METHYL NAPHTHALENE SULFONIC ACID-FORMALDEHYDE CONDENSATE, SODIUM SALT

CAS Number: 9008-64-4.
EC / List Number: 618-442-3.
Molecular Formula: Polymeric composition; no single discrete molecular formula is assigned to the commercial condensate.
Molecular Weight: Molecular-weight distribution; no universal single molar mass is assigned.
Boiling Point: No verified fixed boiling point for the polymer; a numerical value is not assigned here.
Melting Point: No verified fixed melting point for the commercial condensate; application heat-stability ratings are separate measurements.
Viscosity: Not applicable as a conventional liquid viscosity for dry powder; solution viscosity requires concentration, temperature and method.
Density: A reliable grade-specific numerical value was not verified; powder bulk density and liquid-solution density are different properties.

COMMON PRODUCT AND CHEMICAL NAMES

Methyl naphthalene sulfonic acid-formaldehyde condensate, sodium salt
Methylnaphthalenesulfonic acid-formaldehyde condensate, sodium salt
Sodium methylnaphthalenesulfonate-formaldehyde copolymer
Poly(formaldehyde-co-sodium methylnaphthalenesulfonate)
Naphthalenesulfonic acid, methyl-, sodium salt, polymer with formaldehyde
Naphthalenesulfonic acid, methyl-, sodium salt (1:1), polymer with formaldehyde
Methylnaphthalene sulfonate formaldehyde condensate, sodium salt
Dispersant MF, where the supplier identifies this methyl-substituted condensate chemistry

DESCRIPTION AND CHEMICAL IDENTITY

The supplied name identifies the sodium salt of a formaldehyde condensate based on methylnaphthalene sulfonic acid. The methyl substitution is chemically relevant and should remain part of the identity when requesting product documents or comparing candidate materials.
The CAS number 9008-64-4 is associated with the exact substance name in the official food-contact substance inventory. A matching registry name establishes an identity reference, but it does not specify the polymer distribution, inorganic salt content, moisture, color or application performance of an individual shipment.
Some commercial documentation associates methyl naphthalene condensate products with additional registry identifiers. Such documentation must be reviewed for the offered product rather than used to replace one CAS number automatically with another.

Unsubstituted naphthalene sulfonate-formaldehyde condensates and more broadly described alkyl naphthalene condensates are related materials. They should not be represented as exact synonyms solely because all are aromatic sulfonate dispersants.
In this context, MF refers to a commercial dispersant designation. The abbreviation must not be confused with melamine-formaldehyde resin, which has different chemistry and serves different functions.
Methyl Naphthalene Sulfonic Acid-Formaldehyde Condensate, Sodium Salt is normally evaluated as a formulation auxiliary. It does not supply the chromophore of a disperse dye, the fungicidal activity of a crop-protection active ingredient or the film-forming function of a printing binder.

MOLECULAR STRUCTURE AND DISPERSION MECHANISM

Manufacturing literature describes methylnaphthalene sulfonation, condensation with formaldehyde and neutralization to produce the sodium sulfonate form. Reaction conditions and feedstock composition influence the resulting distribution of structures rather than producing one universally identical small molecule.
The aromatic regions provide a relatively hydrophobic part of Methyl Naphthalene Sulfonic Acid-Formaldehyde Condensate, Sodium Salt. Sulfonate groups provide ionic, water-compatible functionality, with sodium ions serving as counterions.
When a suitable polymer fraction adsorbs onto a particle, sulfonate-bearing segments can contribute negative charge to the particle interface. Repulsion between similarly charged particles can then oppose aggregation and help maintain a more dispersed suspension.
This mechanism requires an appropriate interaction between dispersant and substrate. A good result with one dye, pigment or coal sample does not prove equivalent adsorption onto another material with different surface chemistry.

Dispersion is also different from dissolution. Methyl Naphthalene Sulfonic Acid-Formaldehyde Condensate, Sodium Salt may dissolve in the aqueous phase while the dye or pigment remains present as finely divided solid particles; the formulation can therefore be a stable dispersion without being a molecular solution.
Mechanical energy and chemical stabilization have complementary roles. Milling or mixing separates particles and exposes fresh surface, while an effective dispersant helps stabilize that surface against renewed association.
A lower slurry viscosity can be consistent with reduced particle networking. However, viscosity alone cannot establish particle-size stability, absence of sedimentation or suitability for the final process.
Formulation assessment should therefore connect the proposed mechanism with measurable outcomes. Particle size, filtration residue, rheology, sediment character and end-use performance each provide different information.

PHYSICAL AND CHEMICAL PROPERTIES

The information below separates the general polymer identity from published commercial MF-grade examples. It is not a combined specification or a declaration of the properties of all material offered by Ataman Chemicals.
Physical Form: Documented MF commercial material includes brown to dark brown powder. Liquid preparations require their own solids and composition data.
Appearance in Water: Methyl Naphthalene Sulfonic Acid-Formaldehyde Condensate, Sodium Salt is described as water-soluble. Solution appearance and residual insoluble matter should be measured at the concentration relevant to the intended process.
Ionic Character: Anionic, arising principally from sulfonate functionality.
Structural Character: Methyl-substituted aromatic sulfonate condensate with formaldehyde-derived methylene linking groups.
Molecular Composition: A distribution of polymeric species, rather than one defined molecule with a universal formula and exact mass.
Aqueous pH: A published MF-grade example specifies pH 7-9 for a 1% solution. The solution basis belongs with the result, and the actual supplied grade must be checked independently.
Sodium Sulfate: The same published MF-grade example specifies a maximum of 5%. This is an inorganic-salt criterion, not a polymer-purity value.
Water-Insoluble Matter: That example specifies a maximum of 0.05%. The test procedure and sample preparation govern how the residue is determined.
Calcium and Magnesium: That example specifies a maximum of 4000 ppm. Confirm whether the supplier reports these together and on what analytical basis before comparing results.
Application Heat Stability: The example reports grade 4-5 in a test using C.I. Disperse Blue 79 at 130 degrees Celsius. This is a dye-dispersion test result and does not establish the polymer's melting point, decomposition temperature or maximum storage temperature.
Relative Dispersing Performance: Other published MF specifications express dispersing force relative to a reference material. A result such as 95% relative performance must not be relabeled as 95% chemical purity.
Solution Viscosity: No adequately documented universal value is assigned. Concentration, temperature, dissolved salt, polymer distribution and measurement conditions must accompany a numerical result.
Powder Density: No verified universal bulk-density range is assigned. Loose bulk density, tapped bulk density and true material density are distinct quantities.
Liquid Density: A value for an aqueous commercial solution would describe that solution at its stated concentration and temperature, not the dry condensate.
Melting and Boiling Behavior: No supported fixed numerical values are assigned. An ionic polymer should not be described using boiling-point data taken from methylnaphthalene feedstock or formaldehyde.
Residual Formaldehyde: No universal concentration is assigned to this CAS entry. A quantitative statement requires a current grade specification or batch analysis and a defined test method.
Color Contribution: The brown appearance of representative grades makes color carryover relevant to pale shades, white substrates and color-sensitive formulations. Actual impact depends on dose and the complete system.
Foaming: No universal zero-foam claim is made. Mixing, pumping, water quality and other surfactants influence the foam and entrained-air behavior of the finished dispersion.

INTERPRETING GRADE COMPOSITION AND TEST RESULTS

Total solids, organic dispersant content and inorganic salts are separate quantities. Drying a solution measures material remaining under the drying procedure, which can include both polymer and dissolved salts.
A powder's moisture result likewise does not establish the purity of its remaining solids. Two low-moisture grades can still differ in sodium sulfate, polymer distribution, insoluble material and dispersing efficiency.
For this reason, a high-solids claim should be accompanied by a clear description of what is included. Application comparisons are more informative when the addition basis is explicitly stated as product supplied, dry solids or independently determined dispersant content.

A measured aqueous pH applies to the specified preparation. It is not a pH value for a dry solid and does not independently establish eye safety or compatibility with all acidic and alkaline formulations.
Thermal ratings are meaningful only within the named procedure. A scale result with one disperse dye cannot be converted into a guaranteed stability claim for every dye, electrolyte concentration and heating cycle.
The production route can introduce differences in residual starting materials and feedstock-derived constituents. Where a restricted-substance requirement applies, a relevant analytical report is more useful than a broad statement that the chemistry is formaldehyde-free or impurity-free.
Batch consistency should be linked to the customer's actual failure mode. For a mill experiencing specks, insoluble residue and filtration behavior may be more immediately informative than a supplier's general claim of strong dispersibility.

APPLICATIONS IN DYE MANUFACTURING AND GRINDING

Disperse and vat dye preparation are established application areas for Methyl Naphthalene Sulfonic Acid-Formaldehyde Condensate, Sodium Salt. These colorants can require controlled particle size and reliable redispersion to function consistently during subsequent processing.
During wet grinding, particle breakage increases the exposed surface requiring stabilization. An appropriately selected MF grade can help limit reagglomeration, allowing the mechanically generated dispersion to remain useful beyond the milling step.
The relevant endpoint includes the coarse-particle tail as well as the average particle size. A small fraction of persistent agglomerates may cause filtration problems or visible defects even when the average size appears acceptable.

For production control, compare the dispersant with the existing process at matched colorant loading and milling conditions. Record viscosity during processing and examine the dispersion after standing, dilution and the intended thermal cycle.
A reduction in milling time or an increase in achievable solids can be a useful commercial outcome, but neither should be promised from the chemical name alone. The result depends on the dye crystal characteristics, equipment, energy input and additive package.
The required amount is not fixed across all dyes. A grade-specific starting recommendation and a documented trial series provide a defensible basis for selecting the addition level.

APPLICATIONS IN DYE STANDARDIZATION AND REDISPERSION

Manufactured dyes are often adjusted to a defined strength and supplied in forms that must disperse reproducibly in use. Methyl Naphthalene Sulfonic Acid-Formaldehyde Condensate, Sodium Salt can be part of the auxiliary package used to manage dispersion during preparation and reconstitution.
Drying and subsequent storage can change particle association. A satisfactory wet millbase therefore does not by itself prove that the finished powder or granule will redisperse without persistent residue.
Evaluation should follow the intended product through its complete route, including drying where applicable, storage and customer make-up. The water, mixing intensity and concentration used for redispersion should resemble those encountered in practice.
The dispersant's own color and inorganic salts can contribute to the standardized product. They must be considered together with strength adjustment, handling characteristics and acceptable residual matter.
A comparison based only on nominal dispersant percentage can be misleading when products differ in moisture or salts. The final dye preparation should meet its own dispersion, strength and consistency requirements regardless of how similar the raw-material labels appear.

APPLICATIONS IN TEXTILE DYEING

In aqueous processing with sparingly soluble colorants, maintaining a usable dispersion helps deliver colorant through the bath and equipment. An MF grade may be evaluated where agglomeration, deposits or filtration residue are limiting process consistency.
Methyl Naphthalene Sulfonic Acid-Formaldehyde Condensate, Sodium Salt assists the behavior of colorant particles in the bath. Fiber preparation, bath circulation, temperature history and the dye's affinity for the fiber remain separate determinants of the result.
High-temperature polyester dyeing is one relevant evaluation environment. The published 130-degree dye-dispersion rating described above is useful evidence for the tested commercial grade, but the customer's dye mixture and bath chemistry still require confirmation.
Vat dye processing introduces changing chemical and physical conditions during reduction, application and oxidation. An auxiliary suitable for the insoluble dye dispersion must also fit the actual reducing bath, alkali, electrolyte and processing sequence.
Commercial MF literature also mentions additional dye classes and printing operations. The specific function should be identified before use, because water-soluble reactive or acid dyes do not present the same particle-dispersion problem as an insoluble disperse dye.
A generic improvement in levelness, exhaustion or fastness cannot be assumed. These properties must be evaluated on the actual textile using an appropriate reference process.

APPLICATIONS IN PIGMENT DISPERSIONS AND PRINTING

Selected aqueous pigment and printing-color preparations are further screening areas for grades of Methyl Naphthalene Sulfonic Acid-Formaldehyde Condensate, Sodium Salt. The intended role is control of particle distribution and associated flow behavior.
Pigments differ in surface treatment, surface area and interaction with the liquid phase. A dispersant that adsorbs effectively on one pigment can be insufficient, excessive or incompatible with another.
A useful evaluation follows both the pigment concentrate and the completed printing formulation. Addition of binder, thickener, electrolyte, crosslinking agent or other auxiliaries can alter the balance established during pigment grinding.
Measure changes in viscosity and particle size after these additions rather than judging the concentrate alone. Filtration and storage observations can reveal coarse matter or flocculation that is less obvious in a freshly mixed sample.
The dispersant does not replace a binder's film formation or a thickener's control of print-paste structure. Improvements in print sharpness, rubbing resistance, gloss or color development require evidence from the complete formulation.
The color of Methyl Naphthalene Sulfonic Acid-Formaldehyde Condensate, Sodium Salt itself can be a selection constraint in light shades. Low addition level does not remove the need to check background coloration where the application is sensitive.

APPLICATIONS IN PAPER AND PAPERBOARD MANUFACTURE

The exact substance is identified in United States food-contact paper regulations. Under the relevant provision for paper contacting aqueous and fatty foods, its specified role concerns managing pulp absorbency and pitch before the sheet is formed.
This is a defined paper-manufacturing use. It should not be expanded into a general statement that every commercial MF grade is approved for direct food addition, every packaging application or every manufacturing stage.
From a process-development perspective, the auxiliary must fit the furnish and the mill's existing chemical program. Retention aids, sizing chemicals, fillers and dissolved constituents can change how an anionic dispersant behaves.
The practical assessment should include the intended pitch or absorbency outcome together with drainage, deposits and finished-sheet properties. A change that improves one measurement may affect another part of the wet-end system.
For a food-contact enquiry, chemical identity is only one part of qualification. The relevant conditions of use and the documentation for the offered grade and finished paper must also be reviewed.
The separate provision for dry-food paper and paperboard has its own context. A regulation listing is therefore a starting point for assessing the actual use, rather than a universal food-grade designation.

APPLICATIONS IN CROP-PROTECTION FORMULATIONS

Commercial methyl naphthalene condensate dispersants are used as crop-protection co-formulants. Product safety documentation also identifies material associated with CAS 9008-64-4 in a water-dispersible fungicide formulation.
The function is physical formulation support rather than pesticidal activity. In a suitable formulation, dispersant selection can influence how solid active particles separate and remain distributed after contact with water.
For a water-dispersible granule or wettable powder, granule breakdown, wetting, dispersibility and suspension behavior need separate assessment. A dispersant may be one part of a package that also contains wetting agents, binders and fillers.
Aqueous suspension concentrates present another possible grade-selection problem, involving particle stabilization together with viscosity and sediment management. Their requirements should not be inferred directly from performance in a dried formulation.
Compatibility of Methyl Naphthalene Sulfonic Acid-Formaldehyde Condensate, Sodium Salt depends on the active ingredient, particle surface, pH, electrolyte content and other co-formulants. Chemical stability of the active and physical stability of the formulation both matter.
The use of a related commercial product in this sector does not establish authorization of every MF grade in every market. The complete formulation and the specific co-formulant must meet the applicable requirements.

APPLICATIONS IN COAL-WATER AND OTHER PARTICULATE SLURRIES

Published research has used MF dispersants in coal-water and model particle suspensions. These studies support evaluating the chemistry where particle interactions contribute to difficult flow behavior at substantial solids loading.
In such systems, adsorbed Methyl Naphthalene Sulfonic Acid-Formaldehyde Condensate, Sodium Salt can change the balance of attractive and repulsive interactions. A reduction in particle networking can reduce apparent viscosity or yield stress, but the measured response depends on the material and preparation route.
Research involving a second immiscible liquid showed that both addition order and liquid amount influenced suspension microstructure and rheology. This is evidence that formulation history matters; it is not a general recommendation to add an organic liquid to every slurry.
More recent lignite work examined the relationship between modified coal surfaces and MF adsorption. That research highlights the importance of matching the dispersant to substrate chemistry rather than assuming that all coal samples behave alike.
For an industrial slurry, pumpability should be considered alongside settling, hard sediment formation and restart behavior. A less viscous suspension is not automatically a more storage-stable suspension.
Particle-size distribution, ash content, water absorption and process water should remain controlled when comparing dispersants. Laboratory results for a particular coal or model particle must remain associated with that experimental system.

OTHER DOCUMENTED AND SPECIALIST APPLICATION AREAS

MF commercial literature includes leather-processing auxiliaries and stabilization of selected rubber systems. These should be treated as grade- and process-dependent uses rather than universal suitability claims for all tanning, latex or rubber formulations.
Leather processes involve chemically different stages and auxiliaries. An anionic dispersant must be assessed with the actual tanning or retanning ingredients and with the required penetration, distribution and finished-leather properties.
In a latex-containing system, ionic compatibility is particularly relevant. The finished dispersion must retain its intended stability during addition, dilution and any subsequent processing step.
Mineral-processing research has also investigated this MF chemistry in the separation of graphite and sericite. That is a specialized research application involving particular mineral surfaces and flotation conditions, rather than evidence of a universal flotation response.
Broad uses reported for the entire naphthalene sulfonate condensate family should not automatically be assigned to this methyl-substituted product. Concrete, oilfield, ceramic or other applications require evidence for the actual proposed grade and process.

COMPATIBILITY AND FORMULATION DEVELOPMENT

Water quality is a practical variable because dissolved ions can influence electrostatic stabilization and adsorption. A result obtained in laboratory deionized water should be confirmed with the water used by the plant or end customer.
Cationic additives deserve particular attention when combined with an anionic dispersant such as Methyl Naphthalene Sulfonic Acid-Formaldehyde Condensate, Sodium Salt. Association, turbidity or loss of dispersion stability may occur, so addition sequence and compatibility should be established in the complete mixture.
Nonionic surfactants, other anionic auxiliaries and antifoams can also change the interface. A visually clear blend of the additives alone does not prove that they will behave the same way once solid particles are present.

Electrolyte content includes salts introduced with the dispersant itself as well as those already in the formulation. Changing a high-salt grade to a lower-salt product may require reassessing the overall formulation rather than matching only the mass added.
The first trial should define the problem being solved: coarse residue, excessive milling viscosity, heat-induced agglomeration, poor redispersion or another measurable defect. That definition helps prevent an apparent improvement in one area from concealing deterioration elsewhere.
No universal dosage is assigned here. Use the current recommendation for the proposed grade as a starting point and state the addition basis explicitly.
When comparing candidates, keep solids loading, water, mixing energy and the other auxiliaries consistent. Examine both immediate performance and behavior after the intended processing and storage exposure.

PROCESSING AND SOLUTION PREPARATION

Prepare a stock solution of Methyl Naphthalene Sulfonic Acid-Formaldehyde Condensate, Sodium Salt only at a concentration supported by the grade's technical information and the plant's handling requirements. A concentrated solution can behave differently from the dilute preparation used for a pH test.
Introduce Methyl Naphthalene Sulfonic Acid-Formaldehyde Condensate, Sodium Salt powder under controlled mixing with effective dust control. Observe whether persistent lumps or residue reflect incomplete incorporation, inadequate mixing or material that remains insoluble under the chosen conditions.
A preparation sequence should establish complete incorporation of Methyl Naphthalene Sulfonic Acid-Formaldehyde Condensate, Sodium Salt before its performance is judged. However, the optimum order relative to pigment, dye, binder or other ingredients depends on the process and should be validated rather than prescribed universally.
Filtration may be relevant where coarse residue would damage product quality or equipment performance. The filter must be chosen for the intended process, and retained solids should be investigated when they indicate a recurring formulation problem.
For an aqueous stock, record concentration, preparation date and storage conditions. The dry-powder shelf life cannot be assumed to establish the stability or microbiological suitability of a plant-prepared liquid.
A commercial liquid and a solution made from powder should be compared on composition as well as concentration. Differences in salt, pH adjustment, other ingredients or preservation may affect their equivalence.

COMPARISON WITH RELATED DISPERSANTS

MF and NNO are related aromatic sulfonate condensate dispersants, with methyl substitution being a relevant structural distinction. Trade designations alone do not define their complete polymer distributions or commercial specifications.
Research in a silicone waterless polyester dyeing system found different effects from the two dispersants. In that experiment, MF reduced dye exhaustion while NNO improved it, showing why a structural relationship cannot establish interchangeable performance in a particular medium.
Those findings should remain tied to the studied dye and nonaqueous system. They do not establish that MF invariably reduces exhaustion in ordinary aqueous textile dyeing.
Lignosulfonates and other polymeric dispersants offer different combinations of structure, color, adsorption and salt contribution. Their value must be determined against the customer's application requirements rather than by assuming that one chemical family is always superior.
A replacement decision should consider the full process and final quality, including material consumption, coarse residue, viscosity, thermal response and storage behavior. A lower price per kilogram does not necessarily imply lower cost per acceptable batch.
Equally, a higher relative dispersing-force value is not a universal ranking across unrelated substrates. The reference material, method and actual application determine the significance of the number.

QUALITY CONTROL AND SUPPLY CONSIDERATIONS

For a technical enquiry to Ataman Chemicals, identify the intended application, present dispersant and the main process problem. The exact CAS reference and required physical form help distinguish Methyl Naphthalene Sulfonic Acid-Formaldehyde Condensate, Sodium Salt from neighboring condensate chemistries.
Useful grade documentation includes the technical data sheet, current safety data sheet and batch certificate of analysis. Acceptance criteria should reflect both the analytical specification and a representative application test.
For powder, moisture, appearance, insoluble matter and relevant salt measurements can affect handling and formulation consistency. For a liquid preparation, solids, density and viscosity need their own defined methods and temperatures.
Where formaldehyde or another restricted constituent matters, request the relevant result with the analytical method and reporting limit. A polymer's use of formaldehyde in manufacture does not by itself determine the amount of free formaldehyde remaining in a commercial grade.
Keep a retained reference or another suitable comparison basis when qualifying replacement supply. A matching CAS number is valuable but does not demonstrate equal color, heat performance or substrate compatibility.
Packaging, storage life and available commercial forms should be confirmed for the offered grade of Methyl Naphthalene Sulfonic Acid-Formaldehyde Condensate, Sodium Salt. No specific pack size, stock availability, certification or fixed shelf-life guarantee is inferred from the generic chemical name.

STARTING FORMULATION APPROACHES FOR METHYL NAPHTHALENE SULFONIC ACID-FORMALDEHYDE CONDENSATE, SODIUM SALT

The following examples illustrate how Methyl Naphthalene Sulfonic Acid-Formaldehyde Condensate, Sodium Salt can be evaluated during formulation and process development. These starting approaches are not validated commercial recipes, production instructions, or final formulations confirmed to comply with applicable regulations.
The suggested levels are illustrative starting points for preliminary laboratory trials. Also described as sodium methylnaphthalenesulfonate-formaldehyde condensate, this water-soluble anionic dispersant contains aromatic segments and sulfonate groups. Its molecular weight distribution, active content, inorganic salt content, residual formaldehyde, and compatibility with the dispersed solid can significantly influence performance. Laboratory evaluation, performance testing, safety assessment, and applicable regulatory checks are required for each application.
Dispersant dosages below are expressed as active polymer unless otherwise stated. Calculate the supplied quantity from the documented active content and account for introduced water or salts. Total dry residue must not automatically be treated as active dispersant because inorganic salts can contribute to solids. If active content is unavailable, run a separately identified as-supplied comparison and report that basis explicitly.

EXAMPLE 1: METHYL NAPHTHALENE SULFONIC ACID-FORMALDEHYDE CONDENSATE, SODIUM SALT DOSAGE SCREENING IN AN AQUEOUS PIGMENT PASTE

Objective: To determine how the anionic condensate affects pigment wetting, milling viscosity, particle dispersion, and storage stability.

Starting components:

Methyl Naphthalene Sulfonic Acid-Formaldehyde Condensate, Sodium Salt: approximately 0.5%, 1.0%, 2.0%, and 3.0% active polymer based on dry pigment weight

Selected inorganic pigment: approximately 40.0% of the final paste, using the same grade and surface treatment

Compatible nonionic wetting agent: an illustrative fixed level of approximately 0.2% active material in the final paste

Compatible defoamer: a fixed supplier-supported level

Demineralized water and any compatible preservative: sufficient to reach 100%

Paste pH: select one fixed setpoint within approximately 7.5–8.5, suitable for the chosen pigment

Milling equipment, media loading, energy input, and temperature: keep constant

At 40.0% pigment, these dispersant levels correspond to approximately 0.20%, 0.40%, 0.80%, and 1.20% active polymer in the complete paste. These are screening points; optimum demand depends on pigment surface area and chemistry.

Application approach:

Dissolve the sodium methylnaphthalenesulfonate-formaldehyde condensate in part of the water before introducing the pigment.
Add the wetting agent and defoamer according to their incorporation requirements.
Introduce the pigment gradually under controlled agitation and prepare a uniform premix.
Mill each candidate under the same conditions, monitoring temperature and processing viscosity.
Adjust final weight and pH consistently, then measure fineness, particle size distribution, viscosity, and foam.
Evaluate sedimentation, hard settling, and redispersibility after defined storage periods.
Assess compatibility after addition to the intended binder and compare color strength, gloss, and rub-out behavior at equal pigment loading.
Check whether the dispersant's own color affects pale or white products before selecting the dosage.
Control pigment and dispersant dust, use appropriate eye and hand protection, and collect wash water for suitable treatment.

EXAMPLE 2: METHYL NAPHTHALENE SULFONIC ACID-FORMALDEHYDE CONDENSATE, SODIUM SALT RATIO EVALUATION IN A DISPERSE DYE SUSPENSION

Objective: To assess how dispersant-to-dye ratio influences grinding performance, particle stability, filtration behavior, and thermal dispersion stability.

Starting approach:

Methyl Naphthalene Sulfonic Acid-Formaldehyde Condensate, Sodium Salt: approximately 25, 50, and 75 parts active polymer per 100 parts dry dye

Selected disperse dye: approximately 20.0% dry dye in the final suspension, with assay and existing auxiliaries documented

Corresponding active dispersant in the final suspension: approximately 5.0%, 10.0%, and 15.0%, respectively

Compatible wetting agent: one fixed supplier-supported level

Compatible defoamer and preservative: fixed levels suitable for the selected system

Demineralized water: sufficient to reach 100%

Suspension pH: one fixed setpoint within approximately 6.5–7.5, compatible with the dye

Milling temperature, energy input, and target particle size: keep consistent

The stated ratios are exploratory starting points for a dye preparation, not universal textile bath dosages. A higher proportion of the condensate may change viscosity, electrolyte loading, and color strength per unit product, so comparisons must also be normalized to equal dye content.

Application approach:

Prepare the aqueous dispersant solution and add the fixed wetting agent.
Incorporate the selected dye gradually, accounting for moisture and any dispersant already present in the supplied dye.
Premix and wet-mill under controlled conditions to a defined fineness.
Measure particle size, viscosity, pH, and filter residue using the same methods for every candidate.
Assess settling and redispersibility during a defined storage study.
Dilute samples to the same dye concentration and evaluate dispersion under a laboratory heating profile relevant to the intended textile process.
Check agglomeration and filtration after heating and cooling; evaluate color performance in an established textile test where appropriate.
Select the dispersant-to-dye ratio that balances grinding, storage, and application requirements.
Control dye dust and process exposure, review residual formaldehyde specifications, and use suitable ventilation and personal protection. Manage colored effluent according to applicable requirements.

EXAMPLE 3: METHYL NAPHTHALENE SULFONIC ACID-FORMALDEHYDE CONDENSATE, SODIUM SALT SCREENING IN AN AGROCHEMICAL SUSPENSION CONCENTRATE

Objective: To examine how the dispersant level affects wet milling, suspensibility after dilution, sediment structure, and redispersibility in a waterborne suspension concentrate.

Starting approach:

Methyl Naphthalene Sulfonic Acid-Formaldehyde Condensate, Sodium Salt: approximately 1.0%, 2.0%, and 3.0% active polymer in the complete concentrate

Selected water-insoluble agrochemical active ingredient: approximately 40.0% active ingredient, with raw material purity corrections

Propylene glycol: approximately 5.0%, kept constant

Compatible nonionic wetting agent: an illustrative fixed level of approximately 0.2% active material

Xanthan gum: an illustrative fixed level of approximately 0.15% active polymer

Compatible defoamer and preservative: fixed supplier-supported levels

Demineralized water and compatible pH adjuster: sufficient to reach 100%

Final pH: a fixed target supported by the active ingredient's stability data

Milling conditions, dilution ratio, test-water hardness, and observation periods: keep constant

Use an active ingredient suitable for aqueous suspension development and verify its chemical stability. This design concerns physical formulation performance; biological efficacy, crop compatibility, operator safety, and regulatory authorization require separate evaluation.

Application approach:

Dissolve the sodium methylnaphthalenesulfonate-formaldehyde condensate in water and incorporate the fixed wetting agent and appropriate defoamer portion.
Add the technical active ingredient gradually under controlled mixing and form a uniform premix.
Wet-mill each candidate under the same controlled conditions, recording temperature and energy input.
Prepare xanthan gum separately with a measured portion of formula water and combine after milling using a consistent method.
Incorporate the remaining ingredients, adjust pH and final weight, and allow the same equilibration period.
Measure particle size distribution, viscosity, wet-sieve residue, and initial dispersion quality.
Evaluate dilution in defined soft and hard waters, including suspensibility, foam, and visible flocculation.
Compare settling, caking, redispersibility, and active ingredient assay during appropriate storage testing.
Select the Methyl Naphthalene Sulfonic Acid-Formaldehyde Condensate, Sodium Salt level only after confirming both physical and chemical performance.
Use suitable containment, ventilation, and protective equipment for the selected active ingredient and dispersant. Collect all residues and washings for appropriate disposal; laboratory trials do not authorize field application.

SAFETY AND EXPOSURE CONTROL

Serious eye damage, category 1 with hazard statement H318, is reported in substance notification information and in product documentation identifying this condensate chemistry. The classification and protective measures on the current safety data sheet for the supplied product must govern workplace handling.
Prevent powder or concentrated solution from contacting the eyes. Use suitable chemical eye protection, appropriate gloves and protective clothing selected for the task and the product documentation.
Control dust at bag opening, charging and transfer points. Where engineering controls are insufficient, use respiratory protection selected through the workplace exposure assessment and applicable safety requirements.
Do not infer low hazard from a near-neutral dilute-solution pH. Eye effects depend on more than acidity, and a polymeric surfactant is not automatically harmless because it is used at low concentration in a formulation.
The hazards of a finished pesticide or another blend must not be assigned wholesale to its dispersant component. Likewise, the dispersant's documentation does not replace assessment of the complete industrial formulation.
No universal flash point, dust-explosion characteristic or nonflammability guarantee is assigned here. Fire precautions must reflect the supplied form, current safety documentation and site conditions.

FIRST AID MEASURES

Eye Contact with Methyl Naphthalene Sulfonic Acid-Formaldehyde Condensate, Sodium Salt: Begin rinsing immediately with plenty of clean water. Remove contact lenses if present and easy to remove, continue rinsing and obtain urgent medical attention because serious eye injury may occur.
Skin Contact with MF Dispersant: Remove contaminated clothing and wash exposed skin thoroughly with water and soap. Seek medical advice if irritation or other symptoms persist, and clean clothing before reuse.
Inhalation of MF Dispersant Dust: Move the affected person to fresh air and keep them comfortable for breathing. Obtain medical attention for breathing difficulty, persistent symptoms or significant exposure.
Ingestion of MF Dispersant: Rinse the mouth and seek advice from a poison center or medical professional. Do not induce vomiting unless specifically instructed, and do not give anything by mouth to an unconscious person.
Medical Information for MF Dispersant Exposure: Provide the Methyl Naphthalene Sulfonic Acid-Formaldehyde Condensate, Sodium Salt label and current safety data sheet to the treating professional. Explain whether the exposure involved the dispersant alone or a formulation containing additional hazardous ingredients.

HANDLING AND STORAGE

Handling MF Dispersant Powder: Minimize dust generation and use controlled transfer rather than allowing powder to fall unnecessarily through open air. Keep eating and drinking away from the handling area and wash after work.
Handling MF Dispersant Solutions: Avoid splashing during preparation, pumping and sampling. Provide access to suitable eyewash facilities wherever significant eye exposure is possible.
Storage of Methyl Naphthalene Sulfonic Acid-Formaldehyde Condensate, Sodium Salt Powder: Keep the package closed in a dry, protected area and prevent moisture entry. Investigate caking or changes in solution behavior before assuming that affected material remains suitable for a sensitive application.
Storage of MF Dispersant Liquids: Follow the temperature and storage conditions specified for the actual preparation. Do not assign a freezing limit or preservation system from information about a different liquid condensate grade.
Compatibility during MF Dispersant Storage: Keep away from incompatible materials identified in the current safety data sheet and prevent cross-contamination from other plant chemicals. Package integrity and clear product identification should be maintained through internal transfers.
Shelf Life of MF Dispersant: Use the supplier's stated shelf life and storage conditions for the offered product. No universal duration is assigned to all powders, solutions or plant-prepared stocks.

SPILL CONTROL, DISPOSAL AND TRANSPORT

For a powder spill, restrict access and collect the material using a method that limits dust exposure. Do not use compressed air to redistribute the powder through the workplace.
Contain liquid releases and prevent entry into drains or surface waters. Use a cleanup method compatible with the product and take account of other chemicals present in the spill.
Collected material and contaminated packaging require disposal according to their actual composition and applicable local requirements. A dispersant name is not sufficient to determine the waste classification of a contaminated formulation.
Wastewater assessment should consider the complete process discharge, including colorants, salts, organic load and other ingredients. No universal ready-biodegradability or environmental-harmlessness claim is made for unspecified commercial material.
Transport classification must be taken from the current safety data sheet for the supplied grade and relevant mode of transport. No UN number, packing group or blanket non-dangerous-goods statement is assigned here without that documentation.

FREQUENTLY ASKED QUESTIONS

What is Methyl Naphthalene Sulfonic Acid-Formaldehyde Condensate, Sodium Salt?
Methyl Naphthalene Sulfonic Acid-Formaldehyde Condensate, Sodium Salt is an anionic polymeric dispersant based on methyl-substituted naphthalene sulfonate units condensed using formaldehyde and present in sodium salt form.

Which CAS number matches the exact supplied name?
CAS 9008-64-4 is associated with the exact name in the official food-contact substance inventory; the actual product documents should confirm the identity of the offered grade.

Does Methyl Naphthalene Sulfonic Acid-Formaldehyde Condensate, Sodium Salt have one molecular formula and molecular weight?
No single discrete formula or fixed molar mass adequately describes the commercial polymer distribution, and a finite formula for one model structure should not be presented as the composition of every grade.

Is MF the same as melamine-formaldehyde resin?
No. MF is being used here as a commercial dispersant designation for methyl naphthalene sulfonate condensate chemistry, not as the name of a melamine resin.

Is MF automatically interchangeable with NNO?
No. Related aromatic condensates can differ in structure, composition and application response, so replacement requires a comparison in the actual process.

What are the main applications of Methyl Naphthalene Sulfonic Acid-Formaldehyde Condensate, Sodium Salt?
Established areas include dye preparation and selected textile dispersion processes, with additional documented uses or research involving paper manufacture, crop-protection formulations and concentrated particulate slurries.

Does Methyl Naphthalene Sulfonic Acid-Formaldehyde Condensate, Sodium Salt dissolve insoluble dyes completely?
Its own water solubility does not mean that the colorant becomes a molecular solution; the intended result may be a stable suspension of fine dye particles.

What pH can be expected?
One published MF-grade example specifies pH 7-9 in a 1% aqueous solution, but this is a grade-specific result rather than a universal specification for every product.

Does a 130-degree heat-stability rating describe its melting point?
No. The reported rating is an application test with a specified dye and temperature and should not be used as a melting or decomposition temperature.

Does 95% relative dispersing force mean 95% purity?
No. A relative performance test compares behavior with a reference; it does not measure the mass fraction of chemically pure condensate.

Is a universal dosage available for Methyl Naphthalene Sulfonic Acid-Formaldehyde Condensate, Sodium Salt?
No supported universal dosage is assigned here; the recommended starting range must come from the exact grade documentation and be confirmed with the actual substrate and addition basis.

Can it be used in food-contact paper?
The exact substance appears in defined United States paper and paperboard provisions, but the intended use, conditions and offered grade must be assessed rather than described with a blanket food-grade claim.

Does the name prove that free formaldehyde is present at a particular level?
No. Residual free formaldehyde requires a relevant analytical result, and neither a zero value nor a fixed concentration can be inferred from the polymer name.

Can it improve every dyeing process?
No. Published nonaqueous dyeing research demonstrates that MF can affect uptake differently from a related dispersant, so exhaustion, shade and fastness need process-specific assessment.

What safety issue deserves particular attention?
Serious eye damage is documented for this chemistry, making eye protection, controlled handling and immediate rinsing after exposure especially important; follow the supplied product's current safety data sheet.

What information helps with a supply enquiry for Methyl Naphthalene Sulfonic Acid-Formaldehyde Condensate, Sodium Salt?
Provide the application, exact chemical identity, physical form, current process, required quality criteria and expected demand so that the proposed grade can be assessed against relevant documentation and trials.

TECHNICAL SUMMARY

Methyl Naphthalene Sulfonic Acid-Formaldehyde Condensate, Sodium Salt is an aromatic sulfonate polymeric dispersant associated with CAS 9008-64-4 and EC/list number 618-442-3. Its architecture combines methyl-substituted naphthalene regions, sulfonate functionality, sodium counterions and formaldehyde-derived linking groups. Commercial material contains a distribution of polymeric species. Consequently, identity should be described through the named chemistry and product documentation rather than a single small-molecule formula or an assumed exact molecular weight.
The dispersing function of Methyl Naphthalene Sulfonic Acid-Formaldehyde Condensate, Sodium Salt is associated with adsorption onto compatible solid surfaces and the contribution of anionic functionality to interparticle repulsion in water. Mechanical processing produces or separates particles, while suitable interfacial stabilization helps limit their renewed association. The outcome depends on substrate chemistry, available surface, water composition and the other formulation ingredients. Dissolution of the dispersant and dispersion of an insoluble colorant are different events; a satisfactory product may remain a particulate suspension.

Dye manufacture is a major application area, particularly grinding and preparation of disperse and vat dyes. Evaluation should include coarse residue, particle-size distribution, flow behavior and stability through the intended processing route. Dye standardization and redispersion introduce additional requirements because a freshly milled dispersion may behave differently after drying and storage. In textile dyeing, bath stability is only one contributor to performance, alongside fiber preparation, circulation, temperature and colorant affinity. Exhaustion, levelness and fastness therefore require direct assessment.
Selected pigment and printing systems offer further formulation opportunities, but binder and thickener compatibility must be established in the completed mixture. Defined paper-manufacturing uses are recognized for the exact substance under United States food-contact provisions, with conditions that must remain associated with the intended use. Crop-protection co-formulants and research on coal-water slurries provide additional evidence of industrial relevance. These examples do not establish unrestricted suitability in every formulation carrying a similar dispersant designation.
Published MF-grade data illustrate why specification details matter. One example gives pH 7-9 for a 1% solution, sodium sulfate at a maximum of 5%, water-insoluble matter at a maximum of 0.05% and calcium plus magnesium at a maximum of 4000 ppm. Its heat-stability rating refers to a defined disperse-dye test at 130 degrees Celsius. These figures describe that commercial example, not universal acceptance limits or confirmed specifications for material offered by Ataman Chemicals. Relative dispersing performance is also separate from chemical purity.

Methyl Naphthalene Sulfonic Acid-Formaldehyde Condensate, Sodium Salt should also be compared with related condensates on a common addition basis. Differences in moisture, inorganic salts and the test substrate can make equal product masses an unequal comparison. Process water and addition sequence belong in that comparison because a laboratory result obtained under different preparation conditions may not resolve the production problem.
Grade qualification for Methyl Naphthalene Sulfonic Acid-Formaldehyde Condensate, Sodium Salt should connect analytical information with application results. Confirm the identity, form, solids or active-content basis, relevant salts, residue and current safety documentation. Residual formaldehyde claims require a defined analytical result rather than inference from the production chemistry. Serious eye damage is documented for this chemistry, so eye protection and prompt exposure response are essential. Dry powder should be protected from moisture, while liquid preparations require their own storage conditions. Selection is most reliable when current grade documents and controlled trials address a specific customer process and measurable quality requirement.

CONTACT AND TECHNICAL ENQUIRIES

For enquiries about Methyl Naphthalene Sulfonic Acid-Formaldehyde Condensate, Sodium Salt, provide the intended application, required form and relevant analytical or performance criteria. Ataman Chemicals can be contacted to discuss the proposed product and the documentation required for its evaluation.
Ataman Chemicals
Phone: +90 216 577 10 10
Email: info@atamankimya.com