1,4-NAPHTHOQUINONE

WHAT IS 1,4-NAPHTHOQUINONE?

1,4-Naphthoquinone, also known as 1,4-naphthalenedione, naphthalene-1,4-dione and p-naphthoquinone, is the parent compound of the para-naphthoquinone family, with carbonyl groups positioned at the 1 and 4 locations of a naphthalene-derived ring system. One part of the fused framework retains an aromatic ring, while the other contains the quinone functionality responsible for much of the compound’s characteristic reactivity. 

The name naphthalene-1,4-dione provides a direct structural description of the compound also called 1,4-dihydro-1,4-diketonaphthalene. It identifies a ten-carbon framework containing two oxygen atoms as carbonyl functions, rather than a hydrocarbon carrying unrelated oxygen-containing additives.

Para-naphthoquinone, also written as alpha naphthoquinone, is a chemical building block rather than a universal finished-product ingredient. Its usefulness normally depends on incorporation into a controlled process, conversion into another molecule, or evaluation within a defined technical system. The p-naphthoquinone framework can participate in electron-transfer chemistry and react with appropriate nucleophiles. It can also serve as an electron-deficient reaction partner in selected transformations, giving development chemists several routes for changing its structure.

These functions are connected but should not be treated as interchangeable. A material selected for synthetic conversion may need a different specification from one selected for a polymerization-control study or an analytical experiment. The color of para-naphthoquinone is associated with its conjugated molecular structure. Color can support routine appearance inspection, but it cannot establish identity, active concentration, or the absence of other reactive compounds.

For an industrial buyer, the relevant question is whether 1,4-naphthalenedione provides the required performance under actual operating conditions. A familiar chemical name or an attractive purity figure does not replace compatibility, process-development, and quality-control work. A technically useful product page therefore combines molecular identity with practical purchasing criteria. It explains what p-naphthoquinone can contribute, where its limitations arise, and which measurements allow a customer to qualify an offered grade.

Common Product and Chemical Names

- Preferred product name: 1,4-Naphthoquinone
- Systematic structural name: Naphthalene-1,4-dione
- Common chemical synonym: 1,4-Naphthalenedione
- Common positional synonym: Para-naphthoquinone
- Abbreviated positional synonym: p-Naphthoquinone
- Traditional synonym: Alpha-naphthoquinone
- Plain-text alternative: Alpha naphthoquinone
- Historical structural synonym: 1,4-Dihydro-1,4-naphthalenedione
- Historical synonym: 1,4-Dihydro-1,4-diketonaphthalene
- Common technical abbreviation: 1,4-NQ
- Application-dependent abbreviation: NQ
- Chemical family: Naphthoquinones
- Functional chemical class: Quinones
- Positional form addressed here: 1,4-isomer
- Different positional isomer: 1,2-Naphthoquinone
- Related compound, not a synonym: Menadione
- Related compound, not a synonym: Lawsone
- Related compound, not a synonym: Juglone
- Related compound, not a synonym: Anthraquinone

CAS NO, EC / EINECS NO AND INCI NAME

- CAS No.: 130-15-4
- EC No.: 204-977-6
- EINECS No.: 204-977-6
- Molecular formula: C10H6O2
- Molecular weight: Approximately 158.16 g/mol
- MDL number: MFCD00001676
- INCI name: No verified cosmetic INCI designation assigned in this document
- Cosmetic application status: Not established by the identifiers above
- Food application status: Not established by the identifiers above
- Pharmaceutical application status: Requires separate application-specific qualification
- Commercial mixture identity: Additional components must be declared where present
- Documentation priority: Current supplier specification, SDS, and batch-specific COA

PHYSICAL AND CHEMICAL PROPERTIES

- Physical state at ordinary room temperature: Solid
- Common delivery forms: Crystalline powder, crystals, or flakes
- Typical appearance: Yellow to darker-colored material, depending on grade
- Odor: Pungent
- Molecular formula: C10H6O2
- Molecular weight: Approximately 158.16 g/mol
- Common melting region: Approximately 124-126 °C
- Grade-specific melting specification: Confirm with the offered material
- Water solubility: Limited
- Organic-solvent solubility: Solvent-, temperature-, and concentration-dependent
- Reported solvent compatibility: Several organic solvents, including heated alcohol and certain ether or aromatic systems
- Recommended solvent selection: Application-specific evaluation
- Reported density: Approximately 1.4 g/cm3
- Bulk density: Grade-specific; not equivalent to crystal density
- Sublimation behavior: Reported at elevated temperature
- Volatility assessment: Relevant during heating and exposed-solid handling
- Chemical character: Conjugated quinone
- Principal functional groups: Two carbonyl groups
- Electron-transfer behavior: Redox-active
- Reaction behavior: Electrophilic and condition-dependent
- Compatibility concerns: Reducing agents, nucleophiles, reactive formulation components, and incompatible process chemicals
- Combustion behavior: Combustible material; hazardous decomposition fumes possible
- Appearance as a purity test: Insufficient by itself
- pH of dry material: Not meaningful without a defined aqueous test method
- Solution stability: Must be established for the selected solvent and conditions
- Shelf life: Supplier- and grade-specific
- Storage conditions: Follow the current SDS and supplier instructions

CHEMICAL IDENTITY AND POSITIONAL SPECIFICITY

1,4-Naphthoquinone is identified by the positional numbers in its structural name, 1,4-dihydro-1,4-naphthalenedione. They distinguish the para arrangement of carbonyl groups from the different arrangement present in 1,2-naphthoquinone. A supplier quotation using only the word naphthoquinone can therefore be incomplete. The purchase specification should include the full name and CAS number so that the intended isomer cannot be replaced through shorthand or translation.

Structural differences can change reactivity, redox response, stability, and analytical behavior. A positional isomer should not be accepted as equivalent simply because its molecular formula and molecular weight match the requested compound. The same principle applies to substituted derivatives. Introducing a methyl, hydroxyl, halogen, amino, or other group creates a different molecule whose properties need separate assessment.

Menadione is a methyl-substituted naphthoquinone rather than another name for the unsubstituted parent. Lawsone and juglone contain hydroxyl substitution at different positions and likewise require their own purchasing identities. A chemical database entry can help confirm identity but does not define the complete commercial grade. Water content, residual solvent, related compounds, and physical form remain additional specification questions.

For receiving inspection, label identity should agree with the purchase order and COA. A discrepancy should be resolved before the batch enters production or becomes the basis of a comparative laboratory result. Clear identity control reduces avoidable downstream investigation. It is easier to prevent an incorrect substitution than to determine later why a reaction, inhibitor study, or analytical method behaves differently.

MOLECULAR STRUCTURE AND ELECTRON DISTRIBUTION

1,4-Naphthoquinone, also known as alpha-naphthoquinone, contains a fused-ring system with an electron-deficient quinone region. The carbonyl groups and adjacent unsaturation create a conjugated arrangement that influences both electronic absorption and chemical reactivity. The molecule should not be described as simply naphthalene with two inert oxygen atoms. The quinone functionality changes electron distribution and opens reaction pathways that are absent from the parent hydrocarbon.

Electron delocalization helps explain why para-naphthoquinone can act as an electron acceptor under suitable conditions. The actual response depends on the solvent, proton availability, supporting electrolyte, and other species present. A structural formula alone does not provide a universal redox potential. Potentials should be reported with the reference electrode, medium, concentration, and measurement conditions needed to interpret them.

The aromatic portion contributes to the molecule’s hydrophobic character and interactions with organic media. The carbonyl functions add polarity, but they do not make the compound freely soluble in every aqueous formulation. Substitution on the quinone framework can alter these characteristics. Electron-donating and electron-withdrawing groups can change reaction behavior, while larger substituents can affect solubility and physical handling.

For development chemists, the parent structure provides a relatively uncomplicated starting scaffold. It allows a project to introduce functionality deliberately instead of inheriting an unnecessary substituent from a more complex quinone. For buyers, this means that structural simplicity can be an advantage when the intended route specifically begins with the unsubstituted parent. It is not evidence that p-naphthoquinone is less hazardous or automatically easier to process.

REDOX BEHAVIOR AND ITS PRACTICAL SIGNIFICANCE

1,4-Naphthoquinone, abbreviated 1,4-NQ, has quinone functionality that can participate in reduction and oxidation pathways. Depending on conditions, electron transfer can involve intermediates or more extensively reduced forms rather than one universally fixed reaction sequence. Proton availability can affect the observed chemistry. A nonaqueous electrochemical experiment and a buffered aqueous experiment may therefore produce different responses even when both use the same starting material.

Dissolved oxygen can influence the balance among species and subsequent reactions. Oxygen control should be documented when it affects the purpose of an experiment rather than treated as an incidental laboratory detail. Redox activity can be useful in research, catalysis-related development, and polymerization-control investigations. The useful function depends on the complete system and should be connected to a measurable endpoint.

The same electronic behavior can complicate compatibility. Reducing agents, reactive metals, or other redox-active additives may change the parent quinone before it performs the intended role. A formulation containing the original weighed amount is not necessarily a formulation retaining the original chemical species. Analytical work should distinguish initial dosage from concentration remaining after storage or reaction.

For an electrode study, current response can change because of adsorption, follow-up chemistry, or mass transfer. A change in peak intensity should not automatically be interpreted as a change in intrinsic electron-transfer capability. The purchasing implication is straightforward: redox-sensitive work needs a controlled impurity profile and reproducible solution preparation. A general assay may be insufficient where small amounts of related quinones alter the measured response.

ELECTROPHILIC REACTIVITY AND NUCLEOPHILIC INTERACTIONS

1,4-Naphthoquinone has a quinone ring that can react with suitable nucleophiles under appropriately selected conditions. This provides routes to functional derivatives but also creates compatibility concerns in mixtures containing reactive amines, thiols, or other nucleophilic components. A functional group appearing in a formulation does not establish that it will react at a commercially meaningful rate. Concentration, solvent, temperature, protonation, and residence time determine whether an interaction becomes important.

An amine-containing resin component deserves particular attention during early screening. The chemical environment may allow an interaction with the quinone rather than leave it available solely for an intended inhibitor function. Thiol-containing systems introduce another distinct reaction context. A result obtained in a resin without thiols cannot be transferred automatically into a thiol-functional formulation.

The sequence of addition can also matter. A concentrated local contact between quinone and another reactive ingredient may produce a different outcome from slow introduction into a well-mixed dilute medium. For synthetic work, these interactions are potential tools. For additive work, they may consume the compound, create color changes, or alter cure behavior in ways that require investigation.

Compatibility studies should therefore measure more than appearance. Assay, reaction-product profile, viscosity, and the relevant application endpoint help establish whether the starting material remains useful. A technical specification cannot list every possible interacting ingredient. The customer’s formulation and process information are necessary to determine which compatibility questions deserve priority.

COLOR, LIGHT ABSORPTION, AND APPEARANCE CONTROL

1,4-Naphthoquinone, also called 1,4-naphthalenedione, has a conjugated quinone framework that contributes to its visible appearance. Yellow or darker shades can be encountered, and commercial acceptance should follow the offered grade’s defined appearance specification. A darker material is not automatically unsuitable for every industrial purpose. Some commercial grades permit a broader color range than an analytical laboratory or a visually sensitive formulation would accept.

Conversely, a bright yellow appearance does not prove a high quantitative assay. Color can be influenced by impurities, particle size, concentration, solvent, or chemical changes that cannot be separated through visual inspection alone. Solution color should be evaluated under a reproducible method. Solvent identity, path length, concentration, temperature, and the presence of suspended material all influence the observation.

For color-sensitive resins or coatings, the additive’s optical contribution can limit its practical use. A dosage that performs well in an inhibition study may still produce an unacceptable tint in the final article. An analytical UV-visible method can help compare samples, provided specificity is established. Other conjugated impurities may absorb in overlapping regions and make a simple absorbance reading misleading.

Light exposure should be recorded during stability work. A protected stock and a sample stored in a transparent container can develop differently, so the package and exposure conditions belong in the experimental design. Appearance is most useful as one part of a quality system. It provides a quick screen that should be interpreted together with identity, assay, impurities, and performance measurements.

SOLUBILITY AND SOLVENT SELECTION

1,4-Naphthoquinone, also known as para-naphthoquinone, has limited water solubility compared with many water-compatible formulation ingredients. An aqueous process should therefore be designed around measured solubility rather than an assumption that the carbonyl groups guarantee easy dissolution. Organic-solvent selection depends on the application. A solvent suitable for chromatographic sample preparation may be unsuitable for a production resin, an electrochemical experiment, or a customer’s residual-solvent requirements.

Temperature can increase apparent dissolution but also change evaporation and chemical exposure. A solution prepared warm may crystallize after cooling even though it initially appears uniform. A concentrated stock should be checked at the lowest likely storage and transfer temperature. The solution needs to remain suitable during the actual handling period, not only while it is being mixed.

A mixed solvent can behave differently from either pure component. Changes in composition caused by evaporation or dilution may reduce solubility and create deposits in lines or containers. Compatibility includes the solvent’s effect on the customer’s matrix. A carrier that dissolves the quinone well can still change viscosity, cure, film properties, or analytical background.

The preferred carrier is therefore the one qualified for both the active and the process. A useful supplier discussion includes target stock concentration, operating temperature, final dilution, and any solvent restrictions.

DISSOLUTION, DISPERSION, AND PHYSICAL DISTRIBUTION

1,4-Naphthoquinone can be delivered as a solution or a dispersion, which are different delivery formats. A clear molecular solution distributes the dissolved compound differently from a suspension containing solid particles. The distinction matters at low addition levels. A poorly dispersed suspension can deliver uneven local concentrations even when the total weighed amount is correct.

Particle size affects wetting and settling in a dispersion. It can also affect the time needed to dissolve p-naphthoquinone when the surrounding medium has sufficient solvent capacity. A mixing procedure should distinguish physical distribution from chemical stability. Extended stirring may eliminate visible particles while the compound simultaneously reacts with another formulation component.

For powder additions, gradual introduction into a moving compatible phase can support uniformity. The method still needs enclosed handling and suitable exposure controls because the material hazards are not removed by a convenient mixing sequence. A production line should assess whether solids remain in filters, tubing, or dosing vessels. Those residues can reduce the delivered amount and complicate cleaning or waste handling.

Representative sampling is important when a suspension is used. A sample taken from the upper portion of a settled container may not represent the concentration transferred after agitation. The final delivery instruction should specify whether p-naphthoquinone must be fully dissolved or maintained as a controlled dispersion. Leaving that distinction to operator judgment can create substantial batch variation.

THERMAL BEHAVIOR AND PROCESS EXPOSURE

1,4-Naphthoquinone has a commonly reported melting region around 124-126 °C, which is a physical reference rather than a general safe-processing limit. Chemical compatibility and exposure can become important well below the melting temperature. Heating can increase dissolution and mass transfer. It can also increase sublimation, vapor-related exposure, solvent evaporation, or the rate of unwanted reactions.

A short heated preparation and a prolonged hot hold are different process conditions. Development records should identify both the maximum temperature and the time spent at each relevant stage. For a resin process, thermal stability must be considered together with the matrix’s reactivity. The behavior of the pure solid does not establish the behavior of a mixture containing monomer, initiator residues, or reactive functional groups.

A closed vessel can introduce pressure and containment requirements. The solvent and the complete mixture determine the engineering assessment, not the quinone melting point alone. Thermal analysis can support development when the method is matched to the question. Screening measurements are useful for comparison but should not be overinterpreted as complete scale-up safety evidence.

Industrial reaction or polymerization work may require calorimetry and a formal process-hazard review. Those requirements follow the actual process and should be established by the responsible engineering team. The appropriate objective is a qualified operating envelope. A product page can explain why temperature matters, but it cannot define one universal envelope for every customer’s chemistry.

WHAT PROBLEMS DOES 1,4-NAPHTHOQUINONE HELP SOLVE?

1,4-Naphthoquinone is selected primarily where a quinone intermediate or a particular electronic and reactive framework is required. It provides an accessible parent structure for developing more specialized molecules. In polymerization-control development, p-naphthoquinone can be investigated for its effect on radical processes. The goal may involve storage behavior, processing delay, or cure adjustment, depending on the matrix.

In synthetic development, 1,4-Naphthoquinone can reduce the need to construct the fused quinone framework from simpler starting materials. A qualified parent scaffold can make route planning more direct when the desired derivative is structurally compatible. In functional-material research, its redox and optical characteristics provide an experimental basis. The benefit is a defined molecular starting point rather than a promise that an unmodified powder will perform as a complete device material.

For analytical work, naphthalene-1,4-dione can serve as a target compound in method development. The required grade depends on whether the experiment needs qualitative identification, quantitative calibration, or trace-impurity discrimination. 1,4-Naphthoquinone does not solve every problem associated with resin instability or reaction inconsistency. Inadequate cooling, contamination, poor mixing, or incorrect initiator control require direct correction.

Likewise, color does not make the parent compound an automatically suitable commercial pigment. Lightfastness, migration, binding, toxicity, and end-use requirements need separate evaluation. The most useful application definition states the problem and a measurable acceptance criterion. This allows supplier selection and laboratory testing to focus on the function that actually matters.

BENEFITS FOR MANUFACTURERS AND DOWNSTREAM USERS

1,4-Naphthoquinone can support reproducible route development for manufacturers seeking a defined quinone intermediate. Consistent identity and impurity control reduce uncertainty when comparing reaction conditions or transferring a process. A well-characterized grade can also improve material balance. Quantitative assay and moisture information allow the chemist to calculate the amount of reactive parent compound rather than assume that every kilogram is fully active.

In additive development, a controlled stock format can improve dosing repeatability. That benefit depends on the stock remaining homogeneous and chemically suitable during its approved handling period. For downstream users, the practical benefit is usually delivered through the finished derivative, resin, coating, or technical product. The contribution of alpha-naphthoquinone should be described in relation to that final system.

A reliable intermediate can help maintain color, cure, or synthesis consistency where those properties are linked to raw-material quality. The relationship should be demonstrated rather than assumed from the chemical name. The molecular advantages include a compact conjugated framework and accessible quinone chemistry. The physical advantages can include a solid form convenient for defined weighing, provided handling hazards and dissolution requirements are addressed.

These advantages are conditional on the process. A colorless end product, a strongly aqueous formulation, or a nucleophile-rich matrix may present reasons to choose another material. Commercial value should therefore be assessed as cost per qualified outcome. Purchase price, yield, testing, solvent use, waste, handling, and batch reproducibility all contribute to the actual economic comparison.

ORGANIC SYNTHESIS AND DERIVATIVE DEVELOPMENT

1,4-Naphthoquinone, also known as naphthalene-1,4-dione, is a versatile starting scaffold for organic synthesis. Its quinone region provides opportunities for transformations that introduce functional groups or alter the ring system. A route beginning with the parent compound can offer flexibility. The development chemist can select the intended modification rather than inherit a substituent that may later need to be removed.

The choice still depends on selectivity and downstream purification. A straightforward-looking transformation can produce positional, substitution, or oxidation-state differences that need analytical control. Reaction planning should consider the fate of both carbonyl groups and the adjacent unsaturation. A reagent interacting with one part of the molecule may also alter another functional region under the chosen conditions.

The synthetic advantage should be measured through yield, impurity profile, isolation, and scale suitability. Conversion under one solvent and concentration does not establish production performance. Moisture and residual impurities can influence reaction behavior. A route sensitive to water or trace metals may need a tighter specification than a general-purpose derivative screen.

Isolation requirements can determine whether a grade is commercially useful. A material with acceptable assay may still introduce an impurity that is difficult to purge from the intended product. A purchasing request should therefore name the downstream chemistry where confidentiality allows. Even a broad description of sensitivity, impurity concerns, and analytical needs can improve grade selection.

DYE, COLORANT, AND CHROMOPHORE INTERMEDIATE APPLICATIONS

1,4-Naphthoquinone belongs to the quinone family, whose structures are relevant to the development of colored organic molecules. The parent 1,4-NQ framework can serve as a starting point for derivatives whose substitution changes optical behavior. The chemical’s own yellow appearance is not sufficient to qualify it as a finished dye. A commercial colorant must meet application-specific requirements for shade, strength, stability, migration, and exposure.

Derivative formation can change absorption and interaction with substrates. Those changes need to be attributed to the final compound rather than described as universal properties of the parent. Textile, polymer, ink, and coating applications present different qualification questions. A molecule suited to an exploratory solution spectrum may not bind effectively or remain stable in a commercial matrix.

Residual parent quinone can matter in the final derivative. The process should establish whether it is an allowed impurity, an optical contributor, or a component requiring tighter removal. A color-development program should use instrumental methods where practical. Consistent concentration, solvent, and measurement conditions make comparisons more meaningful than photographs taken under different lighting.

Light and thermal stability should be evaluated in the actual medium. The surrounding resin or binder can change oxygen access, migration, and the rate of color change. For procurement, the important attributes may include related colored impurities and solution clarity. A broad assay limit can be insufficient if a small impurity changes the final shade.

PHARMACEUTICAL INTERMEDIATE AND MEDICINAL-CHEMISTRY CONTEXT

1,4-Naphthoquinone has a scaffold encountered in medicinal chemistry and pharmaceutical-intermediate development. This indicates its relevance as a building block, not approval of the parent compound as a medicine. Research involving substituted naphthoquinones should be interpreted at the level of the actual molecule tested. A biological result for one derivative cannot establish the same effect for unsubstituted para-naphthoquinone.

A pharmaceutical synthesis project requires an application-specific quality strategy. Identity, related compounds, residual solvents, elemental impurities, and manufacturing traceability may all matter. An intermediate specification should consider impurities that could carry through the route. The most important impurity is not always the largest chromatographic peak after the main component.

Supplier manufacturing controls can be relevant even where p-naphthoquinone is not the final active pharmaceutical ingredient. The customer should determine the documentation and audit requirements appropriate to its quality system. Research-grade labeling is not proof of suitability for pharmaceutical production. It may describe an intended laboratory use without the manufacturing information needed for a commercial route.

1,4-Naphthoquinone should not be presented as a consumer treatment for cancer, infection, or another disease. Laboratory observations and mechanistic interest do not provide that basis. The commercial discussion should remain focused on intermediate supply and qualification. A clear description of the intended synthesis stage helps align the offered grade with the customer’s actual requirements.

AGROCHEMICAL INTERMEDIATE APPLICATIONS

1,4-Naphthoquinone can be relevant as a precursor in agrochemical-related synthetic development. Its value lies in the quinone scaffold and the transformations available from that structure. An intermediate role should be distinguished from direct use as an agricultural active. Authorization, efficacy, residues and application conditions belong to the finished substance and product.

The presence of biological activity in a research experiment does not establish field performance. Laboratory models, exposure levels, and tested organisms can differ substantially from agricultural use. A route-development team should examine selectivity and impurity carryover. Quinone-related impurities may persist into a derivative or change the behavior of later reaction stages.

Industrial grade can be suitable for some routes but insufficient for others. The acceptable specification depends on the downstream purification and final product requirements. Moisture and physical form may affect charging and dissolution at scale. Those operational properties should be considered alongside assay when comparing suppliers.

Occupational controls remain important during intermediate handling. A finished-product authorization does not eliminate the need to manage exposure to the raw parent compound. The purchasing request should identify the role as an intermediate and specify the relevant quality constraints. This avoids conflating raw-material supply with approval of an agricultural formulation.

POLYMERIZATION CONTROL AND RADICAL-PROCESS SCREENING

1,4-Naphthoquinone, also abbreviated 1,4-NQ, is encountered in polymerization-inhibitor and retarder discussions. The distinction between inhibition and retardation depends on the observed behavior of the actual system. An inhibitor may produce a period with strongly suppressed polymerization before activity develops. A retarder may instead reduce the rate without creating the same induction behavior.

The effect of p-naphthoquinone depends on the monomer or resin, temperature, oxygen, radical source, impurities, and other additives. No universal dosage can be assigned responsibly from the chemical name alone. A material that delays one resin can behave differently in another. Acrylic, styrenic, polyester-related, and other systems should not be grouped as if they have identical radical chemistry.

The measured benefit must also be balanced against final cure. Excessive delay, incomplete conversion, color, or interference with the intended curing system can make an otherwise effective additive unsuitable. Oxygen dependence should be established experimentally where it affects the system. It should not be assumed either that all quinone inhibitors require oxygen or that every quinone performs independently of it.

A laboratory induction-time result is not a stand-alone safety guarantee. Safe storage and processing of reactive materials require the complete engineering and operating controls established for the process. Supplier qualification should include consistency in assay and reactive impurities. A small change in another radical-active component can influence a low-dose study even when the main assay remains acceptable.

RESIN, ADHESIVE, AND COATING COMPATIBILITY

1,4-Naphthoquinone, also known as naphthalene-1,4-dione, can interact with functional groups present in resins and adhesives. Compatibility should therefore be assessed p-naphthoquinone is assigned a supporting additive role. A nonreactive carrier study is useful for an early physical screen. It can identify dissolution, tint, settling, or viscosity changes without immediately combining the quinone with an initiator system.

The complete reactive formulation requires a separate evaluation. Amines, thiols, peroxides, metal-containing catalysts, and other components may change naphthalene-1,4-dione’s behavior. Color sensitivity can limit practical loading. A formulation that tolerates tint in an opaque industrial coating may be unsuitable for a transparent adhesive or a light-colored final article.

The carrier solvent can also affect cure and film formation. Its compatibility must be assessed independently from the quinone’s solubility. Analytical recovery helps distinguish physical loss from chemical consumption. Adsorption to fillers, retention in filters, or incomplete extraction can produce an apparent concentration change.

Application testing should include the endpoints relevant to 1,4-Naphthoquinone. Storage, cure, adhesion, hardness, flexibility, and appearance are separate measurements rather than one general stability result. The preferred grade is the one that meets those criteria with reproducible manufacturing. A headline assay alone cannot establish suitability for every resin architecture.

CATALYSIS AND DESULFURIZATION DEVELOPMENT

1,4-Naphthoquinone is associated with desulfurization-catalyst contexts in industrial manufacturer descriptions of naphthoquinone chemistry. The parent material’s role depends on the particular catalyst system and process. A quinone can participate in electron-transfer cycles under suitable conditions. Its effectiveness requires the surrounding reaction environment to regenerate or retain the relevant species.

A published or commercial application category does not define a transferable catalyst recipe. Solvent, gas composition, contact method, temperature, and other components determine the actual process. Catalyst stability is distinct from initial activity. A promising first measurement may be insufficient if the compound is consumed, deposited, or converted into an inactive form during repeated operation.

Solubility and transport can affect performance. The active species must be available where the relevant reaction occurs, whether in a liquid phase, supported architecture, or another defined system. Impurities may affect selectivity or lifetime. A catalyst-development specification can therefore prioritize different attributes from a synthesis-intermediate specification.

Pilot testing should include mass balance and the fate of the quinone. Residual material in 1,4-Naphthoquinone may create quality questions. Technical purchasing should identify the intended catalytic role without implying that the supplied powder is a complete catalyst. The offer should be assessed against the customer’s validated system.

ELECTROCHEMICAL AND ENERGY-MATERIAL RESEARCH

1,4-Naphthoquinone has a redox-active quinone structure that makes it relevant to electrochemical research. It can be investigated as a molecular model, a precursor to modified materials, or a component in a defined experimental architecture. Unsubstituted 1,4-naphthoquinone is not automatically an optimized battery material. Solubility, stability, crossover, conductivity, voltage behavior, and cycling response can limit an unmodified molecule.

Electrochemical data should include the medium and reference system. A potential measured in one solvent cannot be transferred directly into another electrolyte without the necessary interpretation. Supporting electrolyte purity and water content can affect the result. Those components should be controlled alongside the quinone grade when reproducibility is important.

A voltammetric signal may include adsorption or follow-up chemistry. Repeated scans can reveal changes that are not visible in a single measurement. For composite studies, the conductive host and binder contribute significantly to performance. A favorable current response cannot be attributed solely to the quinone loading without appropriate controls.

Derivative development can address limitations of the parent structure. Tethering, substitution, or incorporation into a larger framework creates a different material whose behavior must be assessed separately. The buyer should specify whether the project needs a general research reagent or an impurity-controlled material for quantitative comparison. The required documentation follows the experiment’s sensitivity and purpose.

PHOTOCHEMICAL AND OPTICAL-MATERIAL RESEARCH

1,4-Naphthoquinone has a conjugated framework that also supports investigation of light-related behavior. Optical response should be assessed under defined wavelength, intensity, solvent, and exposure conditions. Light absorption does not establish effective photosensitization in every system. A molecule can absorb radiation without producing the reaction or material effect sought by the developer.

Photochemical experiments need controls for temperature and oxygen. Irradiation can change the sample’s physical conditions as well as its chemical state. A photoinitiator-related concept should distinguish the parent compound from functional derivatives or multicomponent systems. The presence of a quinone scaffold does not identify a complete commercial initiation package.

Analytical monitoring can help establish whether the starting material is retained or converted. A change in absorbance may reflect consumption, aggregation, or another species with overlapping optical features. Film and solution studies answer different questions. Matrix rigidity, diffusion, and local environment can change behavior when the compound is transferred into a coating or polymer.

For procurement, trace absorbing impurities may be important. A small contaminant can influence an optical experiment more strongly than its mass fraction suggests. The appropriate claim is an application-specific research opportunity. Commercial suitability requires the final material’s performance and safety to be demonstrated under its intended conditions.

ANALYTICAL METHOD DEVELOPMENT

1,4-Naphthoquinone, also known as 1,4-naphthalenedione, can be measured using methods selected for the matrix and purpose. Chromatography, spectroscopy, and complementary techniques each provide different information. A quantitative method needs specificity for the parent compound. Related quinones or reaction products should not be counted as the same material simply because they contribute a similar detector response.

Chromatographic area purity is not automatically mass assay. Detector response, nonvolatile residues, water, and components not detected by the method can affect the relationship. A method used for raw powder may be unsuitable for a resin sample. Extraction, dilution, filtration, and matrix interference should be qualified for the actual application.

Standard-solution stability matters during calibration. A solution that changes over the analytical sequence can introduce bias even where the instrument itself remains stable. Identity confirmation may require a second technique. Retention time alone can be insufficient when another compound coelutes or when the matrix changes the apparent result.

Method performance should include recovery and precision appropriate to the decision being made. A screening method can be useful without supporting the same release decisions as a validated quantitative method. The supplier should state the method behind a reported assay. This allows the customer to understand what the COA measures and whether additional testing is required.

QUALITY GRADES AND PURITY SELECTION

1,4-Naphthoquinone is supplied under industrial, synthesis, analytical, and other commercial descriptions that indicate intended supply categories. They do not establish one universal specification shared by every supplier using the same label. A synthesis project may prioritize reactive purity and impurity purgeability. An optical experiment may instead need low levels of strongly absorbing related compounds.

A polymerization-control study can be sensitive to traces of other radical-active substances. Those impurities may matter even when the overall assay meets a broad release limit. A moisture-containing grade should be evaluated on its declared basis. If water is included deliberately or permitted by specification, the dosing calculation must account for it.

High chromatographic purity can be useful but incomplete. The purchaser should request quantitative content and relevant nonchromatographic attributes where they affect the process. A higher-priced grade is not automatically the best commercial choice. The right selection meets the actual performance and documentation requirements without paying for attributes that provide no application value.

Second-source qualification should compare identity, assay basis, impurities, moisture, physical form, and solution behavior. Matching CAS numbers is necessary but not sufficient. The approved material code should identify the accepted supplier grade. This prevents a later catalog substitution from bypassing the technical conditions established during development.

MOISTURE, RESIDUAL SOLVENT, AND IMPURITY CONTROL

1,4-Naphthoquinone quality control must account for water content because moisture can influence both calculations and process behavior. A dry-basis assay should not be used as though it describes the entire as-received mass without the appropriate correction. Residual solvent can affect odor, handling, dissolution, or downstream reaction conditions. Its relevance depends on the manufacturing route and the customer’s application.

Related quinones may alter optical or redox measurements. A general assay that groups them together may be inadequate for an experiment requiring the parent compound specifically. Residual starting materials can also matter in synthesis. A component present at a low level may react preferentially and create an impurity difficult to remove later.

Elemental residues deserve attention where catalysis or sensitive analytical work is involved. Their presence should be assessed through an appropriate specification rather than inferred from appearance. Insoluble matter can create filtration losses or equipment deposits. A solution-clarity test at relevant concentration can therefore add practical value to a powder specification.

The impurity strategy should follow risk to the process. It is more useful to identify critical impurities than to request an undifferentiated guarantee that every possible contaminant is absent. A supplier discussion can establish which tests are routine and which require additional analysis. That distinction helps align cost, documentation, and the customer’s actual approval needs.

DOSING BASIS AND MATERIAL-BALANCE CALCULATIONS

1,4-Naphthoquinone dosing calculations should state whether an addition refers to supplied powder or defined active content. Without that distinction, concentration and cost comparisons can be misleading. If a hypothetical material contains 95.0% parent compound on an as-received mass basis, delivering 1.00 g of active requires approximately 1.053 g of supplied material. This calculation is valid only when the assay actually represents the relevant mass content.

A dry-basis result requires separate consideration of water or other excluded mass. The reporting basis must remain consistent through stock preparation and final dilution. Parts per million by weight describes mass concentration. A 100 ppm target corresponds to 100 mg of defined material per kilogram of the final mixture.

That arithmetic does not establish an appropriate inhibitor dose. Selection of a concentration for a reactive process requires the actual system’s performance and safety qualification. Molar calculations use approximately 158.16 g/mol for the parent compound. A 1.00 mmol quantity corresponds to approximately 158.16 mg of pure 1,4-naphthoquinone.

Mass balance should include transfer and sampling losses. At low loading, material retained in a small vessel or dosing line can become a significant fraction of the planned addition. The development record should report both supplied mass and calculated active amount. This makes later grade replacement, analytical comparison, and scale-up review more transparent.

STARTING FORMULAS: PURPOSE AND LIMITATIONS

1,4-Naphthoquinone can be evaluated using the following proposed professional laboratory screening preparations. They illustrate controlled ways to study solution behavior, analytical recovery, optical response, or physical compatibility. They are not manufacturer-validated application recipes. Each requires the selected grade’s documentation, a suitable laboratory risk assessment, and confirmation of compatibility before use.

No example defines a safe inhibitor concentration for storage of a reactive monomer. No composition should be treated as a substitute for validated cooling, contamination control, emergency arrangements, or process engineering. 1,4-Naphthoquinone is hazardous, and solvent hazards remain relevant. Work should use the containment, ventilation, protective equipment, and waste controls established for the actual preparation.

Percentages below are by weight unless another basis is stated explicitly. Solvent quantity is adjusted to achieve the stated final total after accounting for the supplied material’s assay. A chemically compatible stock can still fail physically during storage. Inspect for precipitation and assess concentration over the approved hold period.

An application comparison should include a blank carrier or vehicle. That control helps separate the quinone’s contribution from changes introduced by the solvent or matrix. The examples should be refined around the intended measurement. A preparation suitable for solution spectroscopy is not automatically suitable for synthesis, electrochemistry, or resin production.

STARTING FORMULA FOR A DILUTE ANALYTICAL STOCK

- 1,4-Naphthoquinone, defined active basis: 0.10%
- Qualified analytical solvent: Quantity sufficient to 100.00%
- Initial batch size: Selected according to the analytical method
- Intended purpose: Calibration development or recovery screening
- Required confirmation: Complete dissolution and stock stability

Acetonitrile is one possible analytical solvent to evaluate where it fits the method and laboratory controls. It is not a universal choice, and the target concentration must be confirmed as soluble under the actual storage conditions. Correct the weighed powder amount for the agreed assay basis. Prepare the stock using qualified equipment and label the actual concentration, solvent, source lot, preparation date, and approved hold period.

The proposed composition corresponds to 1 mg defined active per gram of solution. It does not establish an exact molarity without additional information about solution density and preparation basis. Assess the stock at the beginning and end of the planned analytical use period. A clear appearance alone does not prove that the concentration remains unchanged.

Use appropriately prepared blanks and independent dilution checks when the method requires them. A nominal stock concentration should not become a quantitative standard without the necessary characterization.

STARTING FORMULA FOR UV-VISIBLE SCREENING

- Characterized dilute analytical stock: Quantity required for the selected test concentration
- Spectroscopy-compatible solvent: Quantity sufficient for the final preparation
- Initial test concentration: Selected to remain within the instrument’s useful absorbance range
- Blank: The same solvent and carrier composition
- Intended purpose: Spectrum comparison, not stand-alone purity certification

A preliminary low-concentration series is preferable to choosing one strongly colored solution. The concentration should be adjusted to avoid saturation and excessive sensitivity to stray light. The path length and solvent must remain constant across comparative samples. Record temperature and elapsed time after preparation where stability can affect the spectrum.

If a related impurity absorbs in the same region, total absorbance may not distinguish it from the parent. Chromatographic or other identity information may be needed before interpreting the result quantitatively. The preparation can help compare lots or investigate changes during storage. It should not be described as proving chemical purity solely because the spectrum resembles a reference.

STARTING FORMULA FOR A NONREACTIVE CARRIER COMPATIBILITY SCREEN

- Qualified nonreactive liquid carrier: 99.95%
- 1,4-Naphthoquinone, defined active basis: 0.05%
- Reactive monomer: None
- Initiator or peroxide: None
- Intended purpose: Physical distribution, tint, and storage observation

Select the carrier according to the eventual formulation architecture and the material’s measured solubility. The absence of a reactive monomer simplifies the first screen but does not eliminate chemical or occupational hazards. Prepare a matched carrier blank and compare appearance, settling, concentration, and viscosity. Determine whether the quinone remains dissolved or forms a controlled dispersion.

The exploratory loading is not an inhibitor recommendation. It is a convenient physical-screening composition that must be revised if the carrier cannot maintain a suitable preparation. Inspect samples after storage at relevant temperatures and after controlled cooling from the preparation condition. Crystallization can reveal a practical limitation that was not obvious during initial mixing.

A successful result supports further development only. Transfer into a reactive resin requires a separate assessment of reaction, cure, compatibility, and process safety.

STARTING FORMULA FOR CHROMATOGRAPHIC MATRIX RECOVERY

- Defined blank matrix sample: 1.000 g
- Characterized quinone stock: Amount providing the selected spike level
- Qualified extraction solvent: Amount specified by the developing method
- Unspiked control: Prepared from the same matrix
- Intended purpose: Extraction and measurement recovery

Choose spike levels that represent the expected application range and the method’s decision limits. The stock’s carrier should not change the matrix so much that the recovery sample ceases to represent routine analysis. Prepare unspiked and independently spiked samples using the same extraction procedure. Any filtration or transfer step should be examined for analyte retention.

Recovery differences can arise from extraction, adsorption, chemical consumption, or detector interference. A low result does not identify the cause without appropriate controls. A method developed in this way can support resin, intermediate, or waste-stream analysis. Its qualification should follow the actual matrix and intended use rather than the convenience of the initial blank material.

STARTING FORMULA FOR ELECTROCHEMICAL RESEARCH

- 1,4-Naphthoquinone: 1.00 mmol/L, on defined active basis
- Supporting electrolyte: 0.10 mol/L, selected for the method
- Electrochemical solvent: Quantity sufficient for the final volume
- Reference electrode: Identified and appropriate to the medium
- Intended purpose: Controlled redox characterization

For one liter, the nominal pure-compound requirement is approximately 158.16 mg before assay correction. A smaller preparation should be calculated proportionally and made with the precision appropriate to the experiment. The supporting electrolyte and solvent must be qualified together. A conventional nonaqueous system is a research architecture, not a universal recommendation for every electrode or application.

Record oxygen handling, water content, electrode preparation, temperature, and scan conditions. These parameters can alter the observed response and are necessary for meaningful comparison. The preparation does not establish a commercial energy-storage formulation. Cycling stability, containment, electrolyte compatibility, and performance in a complete device require additional development.

STARTING FORMULA FOR SOLVENT-STABILITY COMPARISON

- 1,4-Naphthoquinone, defined active basis: 0.02%
- Candidate solvent A: Quantity sufficient to 100.00%
- Parallel preparation: The same active loading in candidate solvent B
- Controls: Separate solvent blanks
- Intended purpose: Solubility and chemical-retention comparison

Select solvents using the application’s technical and safety requirements. Comparing two arbitrary solvents provides less value than comparing realistic candidates for the intended process. Prepare samples with controlled light exposure and container contact. Analyze concentration and appearance over the proposed hold period rather than selecting a carrier from initial dissolution alone.

Where evaporation is possible, monitor mass or container closure performance. An apparent concentration increase can reflect solvent loss rather than improved chemical retention. The preferred solvent is the one that meets the combined stability, process, analytical, and handling requirements. A higher initial solubility does not automatically make it the better commercial carrier.

PROCESS DEVELOPMENT AND SCALE-UP

1,4-Naphthoquinone scale-up should preserve the conditions that determine chemical and physical behavior. Matching ingredient percentages while changing mixing, temperature, hold time, or addition sequence can produce a different outcome. Powder handling needs a defined containment approach. The process should minimize unnecessary dispersion and establish how material is charged without exposing operators or contaminating adjacent equipment.

A liquid stock can improve dosing but introduces another manufacturing stage. Its concentration, stability, line compatibility, and allowable hold period should be qualified. Transfer losses deserve attention at low loading. Residue in containers, filters, or tubing can change the delivered concentration and may create cleaning or exposure issues.

Mixing uniformity should be examined at the intended scale. A reactive local concentration can matter even where the eventual average concentration is acceptable. Temperature histories should be recorded, including warm holds and cooling delays. Large equipment often changes those histories compared with a laboratory preparation.

A process change involving reactive monomer or initiator requires appropriate technical review. An additive performance result does not independently establish safe operation of the larger system. The validated instruction should identify the accepted grade, assay basis, carrier, addition procedure, and release checks. This turns a chemical choice into a reproducible manufacturing step.

APPLICATION TESTING AND ACCEPTANCE CRITERIA

1,4-Naphthoquinone application testing should begin with the problem the material is intended to solve. A synthesis intermediate, optical reagent, or polymerization-control candidate requires different acceptance criteria. For synthesis, useful endpoints include conversion, selectivity, impurity profile, isolated yield, and purification effort. A high conversion alone may be commercially inadequate if 1,4-Naphthoquinone is difficult to isolate.

For additive work, storage behavior and final product performance both matter. A material that delays reaction successfully can still create unacceptable color or interfere with later cure. Analytical experiments need controls for matrix and method variation. A measured difference should be larger than the uncertainty relevant to the decision.

Representative raw-material lots help assess robustness. A formulation qualified with one unusually clean sample may not represent routine commercial supply. Package contact and light exposure should be included where they affect the application. The laboratory vial is not always a suitable model for production storage.

Criteria should be set before testing rather than adjusted to fit a favorable result. This supports consistent decisions when suppliers or batches are compared. The final qualification combines performance, handling, quality, and commercial feasibility. No single laboratory result should substitute for the complete application assessment.

SAFETY, OCCUPATIONAL EXPOSURE, AND CONTAINMENT

1,4-Naphthoquinone requires professional handling appropriate to a hazardous quinone. Supplier safety information identifies significant toxicity and irritation concerns, with inhalation particularly important during powder or heated-material operations. The exact classification should be taken from the current SDS for the supplied grade and jurisdiction. Differences among supplier classifications do not justify selecting the least restrictive description.

Closed transfer and effective local extraction can reduce exposure opportunities. Personal protective equipment should support those controls rather than replace them. Skin contact should be prevented through suitable work practices and protective materials. Contaminated gloves, tools, and surfaces can create secondary exposure after the main weighing operation is finished.

Eye protection and splash control are relevant to solution preparation. The solvent’s hazards must be included in the assessment alongside those of the quinone. Heating can increase exposure and introduces additional process considerations. 1,4-Naphthalenedione should not be treated as exposure-free simply because it begins as a solid.

Emergency instructions should follow the current SDS and the facility’s medical and incident procedures. Suspected exposure should receive prompt professional assessment rather than improvised treatment. The material is not appropriate for casual consumer formulation experiments. The laboratory examples in this document assume trained personnel, suitable facilities, and the controls required by the operation.

STORAGE, PACKAGING, AND TRANSPORT

1,4-Naphthoquinone storage conditions should follow the offered grade’s current instructions. Protection from unsuitable heat, light, contamination, and incompatible materials can be important to maintaining quality. Containers should remain properly closed and labeled. Repeated opening should be controlled so that the material’s identity and condition remain traceable.

Do not transfer the powder into an improvised container without checking compatibility and containment. A convenient package may provide inadequate closure or create contamination and exposure problems. Prepared solutions need separate storage instructions. Their solvent, concentration, stability, and container-contact behavior can differ substantially from those of the raw solid.

Label stocks with the source batch and actual concentration basis. Preparation date and approved hold period help prevent an aged solution from being used as though it were freshly characterized. Transport classification and packaging requirements must be confirmed from the current SDS and applicable mode-specific rules. Historical reference information should not replace the shipping assessment for the actual product.

Receiving inspection should include packaging condition and label consistency. Damaged or uncertain material should be isolated for review before sampling or use. Shelf-life or retest decisions need a qualified basis. Retaining the expected color is not sufficient evidence that assay, impurities, or performance remain acceptable.

TDS, SDS, COA, AND SUPPLIER DOCUMENTATION

1,4-Naphthoquinone documentation should include a Technical Data Sheet identifying the grade, physical form, composition basis, and relevant typical properties. Typical information should be distinguished from guaranteed release limits. The Safety Data Sheet supports handling, storage, transport, and emergency planning. Confirm that the product name and composition match the material actually offered.

A batch-specific Certificate of Analysis connects the supplied lot to its reported results. The assay method, water content, appearance, and other agreed attributes should be reviewed against the purchase specification. Additional documents may include origin, manufacturing, regulatory, residual-solvent, or quality-system information. Their availability should be confirmed rather than assumed from a general supplier profile.

A quality-system certificate does not establish the identity or purity of a particular batch. Material-level and batch-level evidence remain necessary. Analytical charts can be useful when impurity detail matters. The customer should understand whether the chart is representative, batch-specific, or supplied only for a particular investigation.

Change notification helps maintain process consistency. Changes in manufacture, granulation, analytical method, or packaging can matter even when the CAS number remains the same. Ataman Kimya should be asked to confirm the documentation associated with the actual quotation. This page does not assert that every certificate or analysis is available for every grade.

TROUBLESHOOTING COMMON TECHNICAL ISSUES

1,4-Naphthoquinone dissolution problems should be investigated by reviewing solvent capacity, temperature, particle behavior, and mixing. Increasing heat should not be the automatic response before chemical stability and exposure are considered. If a stock precipitates after cooling, check the concentration and solvent composition. A warm clear solution may be supersaturated under its later storage conditions.

If color changes, examine chemical reaction, light exposure, impurities, and concentration. Visual change alone does not identify which mechanism is responsible. If an assay decreases in a resin matrix, evaluate extraction recovery and adsorption. The result may reflect analytical preparation rather than complete chemical consumption.

If inhibition performance varies, compare the entire system. Monomer composition, oxygen, initiator contamination, temperature, and other radical-active impurities can dominate the response. If final cure becomes unacceptable, reconsider the additive level and compatibility. A longer induction period is not necessarily a better finished-product outcome.

If supplier replacement changes behavior, compare assay basis, moisture, impurity profile, and physical form. A matching chemical identifier does not establish equivalent process performance. If scale-up differs from the laboratory, examine transfer losses, mixing, temperature history, and addition sequence. Operational differences can explain the result without requiring a new molecular mechanism.

TECHNICAL PURCHASING AND COMMERCIAL COMPARISON

1,4-Naphthoquinone quotation requests should state the material’s intended role. Intermediate synthesis, resin screening, analytical work, and electrochemical research require different grade discussions. Specify the required quantity, physical form, assay basis, and critical impurities. Include carrier restrictions or storage conditions where they affect the application.

For a replacement project, provide the accepted specification and relevant performance criteria. This allows the offered sample to be evaluated against the actual process rather than a generic purity target. Compare cost per delivered qualified material. Water content, assay, packaging, testing, solvent preparation, waste, and transfer losses can all change the effective cost.

Lead time and supply continuity should be confirmed for the actual grade. A catalog listing does not establish current inventory or guaranteed delivery capacity. A sample should be representative of the proposed supply. Otherwise, successful development with a specially selected laboratory sample may not predict routine commercial batches.

Commercial agreements should identify the documents and change notifications expected. Clear terms reduce uncertainty when a later batch or manufacturing change requires review. The preferred supplier is the one whose material and response support the customer’s validated needs. Technical clarity and consistent quality are more useful than unsupported claims of universal superiority.

FREQUENTLY ASKED QUESTIONS ABOUT 1,4-NAPHTHOQUINONE

What is 1,4-Naphthoquinone?
1,4-Naphthoquinone is an aromatic organic compound belonging to the quinone family. Its structure contains two carbonyl groups at the 1 and 4 positions of a naphthalene-derived ring system. The compound is used in chemical synthesis, intermediate development and laboratory research.

What is the CAS number of 1,4-Naphthoquinone?
The CAS Registry Number is 130-15-4. This identifier should be checked against the supplier's specification and batch documentation to distinguish the substance from other naphthoquinone isomers.

What is the molecular formula and molecular weight of 1,4-Naphthoquinone?
The molecular formula is C10H6O2, and the molecular weight is approximately 158.16 g/mol. These values describe the unsubstituted parent compound rather than its chemically modified derivatives.

What is the EC number?
The EC number associated with 1,4-naphthalenedione is 204-977-6. Buyers should confirm the identifier in the applicable regulatory documentation when preparing purchasing or compliance records.

What are the common synonyms of 1,4-Naphthoquinone?
Common names include 1,4-naphthalenedione, alpha-naphthoquinone and p-naphthoquinone. These designations refer to the same parent compound when the chemical structure and CAS identity agree.

Is 1,4-Naphthoquinone the same as 1,2-Naphthoquinone?
No. The two substances are positional isomers with different carbonyl-group arrangements. This difference can affect chemical reactivity, physical properties and suitability for particular synthesis routes.

What is the physical appearance of 1,4-Naphthoquinone?
1,4-Naphthoquinone is generally described as a yellow to yellowish crystalline solid. Appearance can vary with purity, impurities and commercial grade. The supplied batch should meet the agreed appearance specification.

What is the melting point of 1,4-Naphthoquinone?
Reported melting temperatures are commonly around 125°C, although reference values and commercial specifications may vary. A measured melting range should be interpreted alongside the analytical purity and testing method.

Is 1,4-Naphthoquinone soluble in water?
The compound has limited water solubility and should not be assumed to dissolve readily in aqueous formulations. Its practical behavior depends on temperature, concentration and the complete chemical system.

Which organic solvents can dissolve 1,4-Naphthoquinone?
1,4-Naphthalenedione can dissolve in selected organic solvents, including acetone and certain alcohols. Solvent selection should be supported by practical solubility and compatibility testing at the intended working concentration.

What are the main industrial applications?
The aromatic quinone is used primarily as an intermediate and reagent in organic chemical synthesis. It is also relevant to the preparation and investigation of substituted naphthoquinones and other specialty compounds. The appropriate commercial grade depends on the downstream process.

Is 1,4-Naphthoquinone used in dye chemistry?
The naphthoquinone structure is relevant to the chemistry of colored organic compounds and certain dye-related intermediates. This does not mean that every commercial grade is approved or suitable for direct use as a colorant.

Is 1,4-Naphthoquinone used in pharmaceutical research?
Naphthoquinone structures are investigated in medicinal chemistry and biological research. Research interest does not establish that the parent substance is an approved pharmaceutical active or suitable for direct therapeutic use.

Can 1,4-Naphthoquinone be used directly in cosmetics?
Direct cosmetic suitability should not be inferred from its use as a chemical intermediate. Safety, purity, regulatory status and the intended exposure conditions require separate assessment before any proposed cosmetic application.

What makes 1,4-Naphthoquinone chemically reactive?
The conjugated quinone system can participate in electron-transfer processes and reactions with suitable nucleophiles. Its behavior depends on the reaction medium, substituents, temperature and other process conditions.

Is 1,4-Naphthoquinone an oxidizing agent?
The quinone structure can participate in oxidation-reduction chemistry. Its redox behavior should not be confused with a universal oxidizing performance claim or a transport hazard classification.

Can 1,4-Naphthoquinone undergo reduction?
Yes. The quinone group can undergo chemical reduction to corresponding reduced forms under suitable reaction conditions. Reaction selectivity and product stability depend on the selected reagents and process environment.

Does 1,4-Naphthoquinone react with amines?
The electrophilic quinone structure can react with certain amines under suitable conditions. The outcome depends on the amine structure, solvent, concentration and reaction conditions.

Is 1,4-Naphthoquinone sensitive to light or heat?
Stability should be evaluated according to the commercial grade and intended storage or processing conditions. Protection from unnecessary heat and light exposure may be appropriate where recommended by the supplier.

How should 1,4-Naphthoquinone be stored?
Store the material in properly closed, compatible containers under the conditions stated in the current Safety Data Sheet. Temperature, light exposure, moisture and chemical incompatibilities should be considered when establishing warehouse procedures.

What precautions are necessary during handling?
Appropriate ventilation, dust control, protective gloves and eye protection should be selected through a workplace risk assessment. Personnel should avoid unnecessary inhalation, ingestion and skin or eye contact. The applicable SDS governs product-specific handling and emergency procedures.

Is 1,4-Naphthoquinone hazardous?
The compound presents chemical handling hazards and should not be treated as a harmless laboratory solid. Its applicable hazard classifications and precautionary statements must be taken from the current SDS for the supplied material.

Can 1,4-Naphthoquinone be released into wastewater?
Uncontrolled release into drains, soil or surface water should be avoided. Wastewater discharge and disposal must comply with applicable environmental regulations and the material's hazard information.

How should chemical waste containing 1,4-Naphthoquinone be disposed of?
Waste should be collected in suitable, clearly identified containers and handled through an authorized disposal route. The disposal method depends on the waste composition, contamination and local regulatory requirements.

What purity should be selected for industrial synthesis?
The required purity depends on reaction sensitivity, impurity tolerance and downstream purification requirements. A higher nominal assay does not automatically provide better process performance if relevant impurities are not controlled.

Why is the impurity profile important?
Minor components can affect reaction selectivity, product color, purification efficiency and final-product quality. Buyers should identify any process-critical impurities and agree on suitable analytical limits.

Which analytical methods can be used for quality control?
Chromatographic methods such as HPLC or GC may be applicable when supported by validated or suitably qualified methods. Identity testing and complementary physical measurements can also form part of the specification.

Does chromatographic purity equal total assay?
Not necessarily. Chromatographic area percentage and mass-based assay can describe different aspects of material quality. Moisture, nonvolatile impurities and method response factors may affect their interpretation.

What documents should buyers request?
Begin with the agreed product specification, current Technical Data Sheet, Safety Data Sheet and batch-specific Certificate of Analysis. Additional origin, traceability and regulatory documents may be required for the intended application.

What should the Certificate of Analysis include?
The COA should identify the product and batch and report results against the agreed quality specification. Relevant parameters may include assay, appearance, impurity limits and other grade-specific acceptance criteria.

Can different suppliers' grades be substituted directly?
Matching CAS numbers do not guarantee equivalent commercial quality or process behavior. Compare assay, impurity profile, analytical methods, physical characteristics and relevant storage conditions before approving a replacement.

What should be checked during a supplier change?
Review chemical identity, grade, purity, critical impurities, batch documentation, packaging and storage requirements. Laboratory qualification and process compatibility testing should be completed where the material affects product quality.

How should commercial quotations be compared?
Compare offers according to usable assay, agreed specifications, packaging, order quantity, documentation and delivery conditions. Price per kilogram alone may not reflect the actual cost of using the material in production.

What information is needed when requesting a quotation?
Provide the intended application, required purity, approximate quantity, packaging preference, delivery destination and necessary documentation. Sharing the existing specification can help clarify whether a proposed alternative meets the technical requirements.

1,4-NAPHTHOQUINONE SUPPLY FROM ATAMAN KIMYA 

1,4-Naphthoquinone can be requested through Ataman Kimya by companies seeking material for industrial synthesis, chemical intermediate production, polymerisation control research or laboratory applications. When requesting 1,4-Naphthoquinone, buyers should specify the intended application, required quantity, physical form, purity level and critical quality parameters. Providing information about reaction conditions, solvent compatibility and impurity sensitivity can help determine whether the offered grade is suitable for the intended process.

Naphthalene-1,4-dione, also referred to as para-naphthoquinone or alpha-naphthoquinone, should be evaluated according to its chemical identity, assay, impurity profile and relevant technical specifications. Buyers should request the current Technical Data Sheet (TDS), Safety Data Sheet (SDS), batch-specific Certificate of Analysis (COA), packaging information, storage requirements and available sample options. These documents support product identification, quality verification and technical comparison before a purchasing decision is made.

When evaluating an alternative supplier, the offered p-naphthoquinone grade should be compared with the existing material under equivalent laboratory or manufacturing conditions. Differences in moisture content, related compounds, dissolution behavior, color impact and application performance may affect processing efficiency and final-product consistency. Purchasing decisions should therefore consider the total qualified cost of use, including testing, solvent consumption, waste management, production yield and supply reliability.

Companies interested in sourcing 1,4-naphthalenedione through Ataman Kimya can submit their required specifications, estimated order volume, packaging preferences, delivery destination and documentation requirements to request a commercial quotation. Product availability, lead times, certificates and technical support should be confirmed for the specific offer rather than assumed. A clear technical specification, representative sample evaluation and transparent commercial terms provide a reliable basis for selecting the appropriate aromatic quinone grade.