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Benzoic acid, 4-nitro- is an aromatic nitro carboxylic acid commonly known as 4-nitrobenzoic acid or p-nitrobenzoic acid.
Benzoic acid, 4-nitro- is a white to pale-yellow crystalline solid containing a carboxylic acid group and a nitro group in para positions on a benzene ring.
Benzoic acid, 4-nitro- is primarily used as a chemical intermediate, laboratory reagent, analytical reference material, and building block for pharmaceuticals, dyes, pigments, polymers, functional crystals, and specialty organic compounds.
CAS Number: 62-23-7
EC Number: 200-526-2
Molecular Formula: C₇H₅NO₄
Molecular Weight: 167.12 g/mol
SYNONYMS
4-Nitrobenzoic Acid, p-Nitrobenzoic Acid, para-Nitrobenzoic Acid, Benzoic Acid, 4-nitro-, Benzoic Acid, p-nitro-, 4-Nitrobenzenecarboxylic Acid, p-Nitrobenzenecarboxylic Acid, para-Nitrobenzenecarboxylic Acid, 1-Carboxy-4-nitrobenzene, 4-Carboxynitrobenzene, p-Carboxynitrobenzene, para-Carboxynitrobenzene, Nitrodracylic Acid, 4-Nitrodracylic Acid, p-Nitrodracylic Acid, PNBA, 4-NBA, p-NBA, Nitrobenzoic Acid para-Isomer, para-Substituted Nitrobenzoic Acid, 4-Nitrobenzoate Conjugate Acid, 4-Nitrobenzoic Acid Reagent, 4-Nitrobenzoic Acid Intermediate, 4-Nitrobenzoic Acid Analytical Standard, High-Purity 4-Nitrobenzoic Acid, Technical-Grade 4-Nitrobenzoic Acid, Reagent-Grade 4-Nitrobenzoic Acid, Synthesis-Grade 4-Nitrobenzoic Acid, Crystalline 4-Nitrobenzoic Acid, Nitroaromatic Carboxylic Acid, Aromatic Nitro Acid, para-Nitro Aromatic Acid, 4-Nitrobenzenecarboxylate Parent Acid, 4-Nitrobenzoate Parent Compound, C₇H₅NO₄, HOOCC₆H₄NO₂, CAS 62-23-7, EC 200-526-2, PubChem CID 6108, CHEBI 262350, DTXSID3020966, NSC 7707, NSC-7707, UNII G83NWR61OW, MFCD00007352, OTLNPYWUJOZPPA-UHFFFAOYSA-N, Kyselina p-nitrobenzoova, Acide 4-Nitrobenzoïque, Ácido 4-Nitrobenzoico, 4-Nitrobenzoesäure
APPLICATIONS
Benzoic acid, 4-nitro- serves as a versatile aromatic intermediate in the manufacture of pharmaceuticals, dyes, pigments, and polymer-related materials.
Benzoic acid, 4-nitro- provides a chemically defined para-substituted structure that allows controlled conversion of either the nitro group or carboxylic acid group.
Benzoic acid, 4-nitro- supports production routes requiring high positional-isomer purity and predictable aromatic substitution behavior.
Benzoic acid, 4-nitro- enables preparation of downstream compounds whose performance depends on retaining the para relationship between the two functional groups.
Benzoic acid, 4-nitro- functions as a precursor for preparing 4-aminobenzoic acid through catalytic or chemical reduction of the nitro group.
Benzoic acid, 4-nitro- supports hydrogenation processes in which the nitro group is converted to an amino group while the carboxylic acid functionality is retained.
Benzoic acid, 4-nitro- enables production of high-purity 4-aminobenzoic acid after reduction, acidification, crystallization, and purification.
Benzoic acid, 4-nitro- provides an important intermediate route toward compounds derived from the para-aminobenzoic acid framework.
Benzoic acid, 4-nitro- serves as a starting material for preparing local-anesthetic and pharmaceutical intermediates based on substituted 4-aminobenzoate structures.
Benzoic acid, 4-nitro- can first be esterified with amino alcohols and then reduced to the corresponding amino-substituted ester.
Benzoic acid, 4-nitro- supports controlled preparation of nitroester intermediates used before catalytic conversion to amino-functional products.
Benzoic acid, 4-nitro- requires pharmaceutical applications to use validated synthesis, purification, impurity-control, and regulatory procedures.
Benzoic acid, 4-nitro- functions as a raw material for preparing lower-alkyl 4-nitrobenzoate esters.
Benzoic acid, 4-nitro- reacts with methanol, ethanol, propanol, and other compatible alcohols under suitable esterification conditions.
Benzoic acid, 4-nitro- enables modification of solubility, melting behavior, reactivity, and chromatographic properties through ester formation.
Benzoic acid, 4-nitro- supports production of intermediates used in organic synthesis, medicinal chemistry, polymer research, and analytical derivatization.
Benzoic acid, 4-nitro- serves as a precursor for preparing diesters and multifunctional aromatic ester intermediates.
Benzoic acid, 4-nitro- can react with glycols, diols, polyols, and multifunctional alcohols under controlled condensation conditions.
Benzoic acid, 4-nitro- contributes rigid aromatic groups and reducible nitro functionality to the resulting ester structures.
Benzoic acid, 4-nitro- enables subsequent conversion of nitro-containing esters into amino-functional monomers and specialty intermediates.
Benzoic acid, 4-nitro- functions as a precursor for preparing 4-nitrobenzoyl chloride.
Benzoic acid, 4-nitro- reacts with suitable chlorinating agents to replace the carboxylic hydroxyl group with a reactive acid-chloride group.
Benzoic acid, 4-nitro- supports production of amides, esters, hydrazides, and other acyl derivatives through the resulting activated intermediate.
Benzoic acid, 4-nitro- requires moisture control because acid chlorides hydrolyze readily and can release corrosive gases.
Benzoic acid, 4-nitro- finds application in the preparation of 4-nitrobenzamide and substituted 4-nitrobenzamides.
Benzoic acid, 4-nitro- enables amidation with ammonia, primary amines, secondary amines, or activated nitrogen-containing compounds.
Benzoic acid, 4-nitro- supports synthesis of intermediates whose nitro group may subsequently be reduced, substituted, or incorporated into fused heterocycles.
Benzoic acid, 4-nitro- contributes a rigid aromatic acyl unit that can influence crystallinity, polarity, and molecular recognition.
Benzoic acid, 4-nitro- serves as a starting material for preparing 4-nitrobenzoic hydrazide and related hydrazide derivatives.
Benzoic acid, 4-nitro- supports conversion to hydrazides through activated ester, acid-chloride, or related acyl-transfer pathways.
Benzoic acid, 4-nitro- enables subsequent condensation of hydrazides with aldehydes and ketones to produce Schiff-base derivatives.
Benzoic acid, 4-nitro- contributes electron-withdrawing nitro functionality to compounds investigated for optical, coordination, and biological properties.
Benzoic acid, 4-nitro- functions as a dyestuff and pigment intermediate in synthesis routes requiring a para-nitro aromatic carboxylic acid.
Benzoic acid, 4-nitro- provides a nitro group that can be reduced to an amino group for diazotization, coupling, and chromophore construction.
Benzoic acid, 4-nitro- provides a carboxyl group that can improve polarity, salt formation, resin interaction, or further derivatization.
Benzoic acid, 4-nitro- supports colorant manufacturing where positional-isomer control influences shade, solubility, and downstream reactivity.
Benzoic acid, 4-nitro- serves as an intermediate for monomeric and polymerizable aromatic materials.
Benzoic acid, 4-nitro- can be converted into esters, amides, amino derivatives, and multifunctional monomers used in polymer research.
Benzoic acid, 4-nitro- contributes aromatic rigidity and electron-withdrawing functionality to suitable polymer building blocks.
Benzoic acid, 4-nitro- enables preparation of materials investigated for thermal performance, degradability, adhesion, and electronic characteristics.
Benzoic acid, 4-nitro- functions as a carboxylate source in metal-catalyzed allylic C–H acyloxylation reactions.
Benzoic acid, 4-nitro- provides the 4-nitrobenzoate group incorporated into suitable alkene substrates under catalytic reaction conditions.
Benzoic acid, 4-nitro- supports preparation of allylic 4-nitrobenzoate esters that can serve as isolable intermediates.
Benzoic acid, 4-nitro- enables synthetic chemists to introduce an activated aromatic carboxylate group with useful downstream reactivity.
Benzoic acid, 4-nitro- serves as an acidic additive in selected organocatalytic reactions.
Benzoic acid, 4-nitro- can modify catalyst protonation, ion pairing, transition-state organization, and reaction rate.
Benzoic acid, 4-nitro- has been employed with chiral amine catalysts in asymmetric carbon–carbon bond-forming reactions.
Benzoic acid, 4-nitro- requires concentration-specific screening because excessive acidity may reduce selectivity or create competing reactions.
Benzoic acid, 4-nitro- finds application as a reference carboxylic acid in esterification, amidation, hydrogenation, and catalytic-method development.
Benzoic acid, 4-nitro- provides readily monitored functional groups for comparing catalyst activity and selectivity.
Benzoic acid, 4-nitro- supports reaction optimization through chromatographic measurement of conversion, by-products, and isomer purity.
Benzoic acid, 4-nitro- enables assessment of whether reaction conditions preserve the aromatic nitro group or convert it selectively.
Benzoic acid, 4-nitro- serves as a ligand or ligand precursor in metal coordination chemistry.
Benzoic acid, 4-nitro- forms 4-nitrobenzoate anions after deprotonation of the carboxylic acid group.
Benzoic acid, 4-nitro- supports monodentate, bridging, chelating, and extended coordination arrangements depending on the metal and auxiliary ligands.
Benzoic acid, 4-nitro- enables preparation of metal complexes and coordination polymers investigated for structural, magnetic, catalytic, and optical properties.
Benzoic acid, 4-nitro- functions as an organic acid component in proton-transfer salts and cocrystals.
Benzoic acid, 4-nitro- forms hydrogen-bonded structures with pyridines, imidazoles, piperazines, amines, and other proton-accepting molecules.
Benzoic acid, 4-nitro- contributes carboxylic-acid, carboxylate, and nitro oxygen atoms capable of participating in extended intermolecular networks.
Benzoic acid, 4-nitro- supports crystal-engineering studies focused on molecular packing, hydrogen bonding, polymorphism, and supramolecular organization.
Benzoic acid, 4-nitro- serves as a component in research on organic nonlinear-optical and optoelectronic crystals.
Benzoic acid, 4-nitro- contributes an electron-withdrawing nitro group and an ionizable carboxylic-acid group to charge-transfer assemblies.
Benzoic acid, 4-nitro- supports formation of crystalline salts whose optical transmission, harmonic generation, and laser-damage behavior can be studied.
Benzoic acid, 4-nitro- requires each derived crystal to be characterized independently because the parent acid alone does not determine final optical performance.
Benzoic acid, 4-nitro- finds application in polymorph, solvate, and crystallization research.
Benzoic acid, 4-nitro- provides a rigid planar aromatic molecule capable of forming strong carboxylic-acid hydrogen bonds.
Benzoic acid, 4-nitro- supports comparison of nucleation, crystal habit, lattice stability, and solvent-dependent solid forms.
Benzoic acid, 4-nitro- enables validation of computational crystal-structure prediction and experimental solid-form screening.
Benzoic acid, 4-nitro- functions as an analytical reference substance for identifying and quantifying nitroaromatic compounds.
Benzoic acid, 4-nitro- supports calibration of liquid-chromatographic, gas-chromatographic, mass-spectrometric, and spectroscopic methods.
Benzoic acid, 4-nitro- provides documented infrared, mass, ultraviolet, and chromatographic reference data.
Benzoic acid, 4-nitro- requires accurately characterized purity and moisture content when used for quantitative analytical work.
Benzoic acid, 4-nitro- serves as a probe compound in environmental oxidation and advanced water-treatment research.
Benzoic acid, 4-nitro- supports measurement of degradation by ozone, hydrogen peroxide, hydroxyl radicals, and related oxidative systems.
Benzoic acid, 4-nitro- enables researchers to compare pollutant conversion under controlled oxidant concentration and reaction conditions.
Benzoic acid, 4-nitro- requires validated analytical methods to distinguish parent-compound disappearance from complete mineralization.
Benzoic acid, 4-nitro- functions as a substrate in microbial transformation and biodegradation studies involving nitroaromatic compounds.
Benzoic acid, 4-nitro- can undergo biological reduction of the nitro group under suitable anaerobic conditions.
Benzoic acid, 4-nitro- supports investigation of microbial pathways that convert nitroaromatic acids into amino-substituted metabolites.
Benzoic acid, 4-nitro- enables assessment of environmental fate while requiring containment and responsible disposal of experimental material.
Benzoic acid, 4-nitro- finds application in electrochemical and bioelectrochemical materials research.
Benzoic acid, 4-nitro- can be incorporated as a mediator-containing component in composite electrode structures.
Benzoic acid, 4-nitro- supports studies of electron transfer, enzyme immobilization, and oxidation reactions in experimental energy devices.
Benzoic acid, 4-nitro- requires device-specific evaluation because performance depends on the complete electrode, polymer, enzyme, and conductive-material system.
Benzoic acid, 4-nitro- serves as an educational reagent for demonstrating aromatic substitution, nitro-group reduction, carboxylic-acid chemistry, and esterification.
Benzoic acid, 4-nitro- supports laboratory instruction in recrystallization, melting-point measurement, spectroscopy, and chromatographic purity analysis.
Benzoic acid, 4-nitro- provides a clear comparison with benzoic acid and the ortho and meta nitrobenzoic-acid isomers.
Benzoic acid, 4-nitro- requires microscale handling and effective dust control because the solid can irritate the skin, eyes, and respiratory tract.
DESCRIPTION
Benzoic acid, 4-nitro- is the registry-style name for 4-nitrobenzoic acid.
Benzoic acid, 4-nitro- is also known as p-nitrobenzoic acid because its nitro and carboxyl groups occupy para positions on the aromatic ring.
Benzoic acid, 4-nitro- is identified by CAS Number 62-23-7 and EC Number 200-526-2.
Benzoic acid, 4-nitro- has the molecular formula C₇H₅NO₄ and molecular weight 167.12 g/mol.
Structurally, Benzoic acid, 4-nitro- contains a benzene ring substituted by one carboxylic acid group and one nitro group.
The carboxylic acid and nitro substituents are positioned opposite each other at the 1 and 4 positions of the aromatic ring.
The nitro group strongly withdraws electron density from the benzene ring through inductive and resonance effects.
The carboxylic acid group provides acidity, hydrogen-bonding capacity, salt formation, and acyl-derivative chemistry.
Benzoic acid, 4-nitro- is functionally related to benzoic acid and forms 4-nitrobenzoate salts after deprotonation.
The 4-nitrobenzoate anion can interact with metal ions, protonated amines, and hydrogen-bond donors.
The para substitution pattern gives Benzoic acid, 4-nitro- comparatively symmetrical molecular geometry.
This symmetry influences crystal packing, melting behavior, and the formation of ordered supramolecular structures.
Benzoic acid, 4-nitro- normally appears as white to yellow or pale-yellow crystals.
Benzoic acid, 4-nitro- is generally described as odorless.
Benzoic acid, 4-nitro- may develop stronger yellow coloration when contaminated, degraded, or exposed to unsuitable processing conditions.
Commercial grades may differ in assay, color, particle size, moisture, acidity, and positional-isomer content.
Benzoic acid, 4-nitro- has a melting point of approximately 242°C.
Benzoic acid, 4-nitro- decomposes at approximately 350°C rather than providing a simple stable atmospheric boiling point.
Benzoic acid, 4-nitro- can release nitrogen oxides and other irritating or toxic fumes during decomposition or combustion.
High-temperature processing should therefore be carried out only with controlled equipment and suitable ventilation.
Benzoic acid, 4-nitro- has a representative solid density of approximately 1.61 g/cm³.
Benzoic acid, 4-nitro- has very low vapor pressure, reported near 1 Pa at 50°C.
Benzoic acid, 4-nitro- therefore presents a greater airborne-exposure concern as dust than as vapor under normal conditions.
Fine particles can become suspended rapidly during pouring, grinding, pneumatic transfer, or mechanical disturbance.
Benzoic acid, 4-nitro- is poorly soluble in water.
Benzoic acid, 4-nitro- has a reported water solubility near 0.03 g per 100 mL at 25°C.
Benzoic acid, 4-nitro- becomes more water compatible after neutralization with a suitable base to form a 4-nitrobenzoate salt.
Benzoic acid, 4-nitro- solubility also increases in selected polar organic solvents and at elevated temperatures.
Benzoic acid, 4-nitro- has a reported log octanol–water partition coefficient near 1.89.
Benzoic acid, 4-nitro- therefore shows moderate affinity for organic phases while retaining appreciable polarity from its acid and nitro groups.
Ionization of the carboxylic acid significantly changes partitioning, mobility, and water-phase behavior.
Environmental and extraction behavior consequently depend strongly on pH and counterion composition.
Benzoic acid, 4-nitro- has a representative closed-cup flash point near 201°C.
Benzoic acid, 4-nitro- has a reported autoignition temperature near 300°C.
Benzoic acid, 4-nitro- is combustible despite its high melting point and low volatility.
Fire can produce irritating or toxic gases, including nitrogen oxides and carbon-containing decomposition products.
Benzoic acid, 4-nitro- can form an explosive dust–air mixture when finely divided material is dispersed at a suitable concentration.
Dry powder can accumulate electrostatic charge during swirling, pouring, pneumatic transport, and similar operations.
Dust layers can create secondary-explosion hazards if disturbed after an initial ignition event.
Processing equipment should therefore control dust generation, static discharge, ignition sources, and surface accumulation.
Benzoic acid, 4-nitro- reacts with bases to form corresponding 4-nitrobenzoate salts.
Benzoic acid, 4-nitro- reacts with alcohols under suitable catalytic conditions to form 4-nitrobenzoate esters.
Benzoic acid, 4-nitro- can be converted to reactive acyl derivatives and subsequently to amides, hydrazides, and multifunctional products.
Benzoic acid, 4-nitro- undergoes reduction of its nitro group to yield 4-aminobenzoic acid while preserving the carboxyl functionality under selective conditions.
Benzoic acid, 4-nitro- can be manufactured through oxidation of suitable para-nitro aromatic precursors.
Benzoic acid, 4-nitro- has been prepared from 4-nitroacetophenone through oxidative conversion of the side chain.
Benzoic acid, 4-nitro- can also be produced through oxidation processes using 4-nitrotoluene as a precursor or reaction medium.
Direct nitration of benzoic acid is less suitable for selective para-isomer production because the carboxyl group directs nitration predominantly toward the meta position.
Industrial purification of Benzoic acid, 4-nitro- may involve crystallization, filtration, washing, drying, and control of residual solvent.
High-purity production requires separation from other nitrobenzoic-acid isomers and unreacted aromatic precursors.
Color control requires limiting strongly colored oxidation by-products, metal contamination, and thermally degraded material.
Representative sampling requires homogeneous particle distribution and protection from contamination during handling.
Benzoic acid, 4-nitro- can form carboxylic-acid dimers through strong intermolecular hydrogen bonding.
Benzoic acid, 4-nitro- can also form acid–base salts and cocrystals with nitrogen-containing organic bases.
The nitro oxygen atoms provide additional hydrogen-bond-accepting sites within the crystal lattice.
These interactions support varied polymorphic, salt, solvate, and coordination structures.
Benzoic acid, 4-nitro- provides both proton-donor and electron-withdrawing functionality.
Benzoic acid, 4-nitro- can modify reaction media through Brønsted acidity and carboxylate formation.
Benzoic acid, 4-nitro- can influence catalytic reactions through ion pairing, metal coordination, or incorporation of the 4-nitrobenzoate group.
Reaction behavior depends on solvent, catalyst, temperature, base concentration, and water content.
Benzoic acid, 4-nitro- is irritating to the skin, eyes, and respiratory tract.
Short-term inhalation exposure to dust may cause coughing and respiratory discomfort.
Skin or eye contact can produce redness and irritation.
Ingestion may cause nausea and vomiting.
Benzoic acid, 4-nitro- has produced reproductive or developmental concerns in animal testing cited in international safety information.
Long-term animal studies have also examined renal and carcinogenic effects.
One chronic study reported some evidence of carcinogenic activity in female rats but not in male rats or mice under the tested conditions.
Current risk assessment should rely on the applicable Safety Data Sheet, exposure limits, and regulatory classification rather than one study alone.
Benzoic acid, 4-nitro- reacts with strong oxidizing agents, reducing agents, and bases.
Contact with potassium hydroxide is specifically associated with an explosion risk in international chemical-safety guidance.
Strong reduction may convert the nitro group into partially reduced intermediates or the corresponding amino compound.
Compatibility testing is essential before Benzoic acid, 4-nitro- is introduced into reactive formulations or synthesis processes.
Benzoic acid, 4-nitro- is generally stable when kept dry, cool, and separated from incompatible materials.
Moisture can affect powder flow, analytical assay, dissolution rate, and salt formation.
Strong heat can cause decomposition and emission of nitrogen-containing fumes.
Contamination with reactive bases, reducing agents, oxidants, or metal-containing residues can alter stability and safety.
Benzoic acid, 4-nitro- quality control commonly includes appearance, identification, assay, melting range, moisture, residue, acidity, and chromatographic purity.
Benzoic acid, 4-nitro- may be analyzed by infrared spectroscopy, mass spectrometry, ultraviolet spectroscopy, and chromatography.
Positional-isomer control is particularly important where the material is used for pharmaceutical, colorant, or monomer synthesis.
The applicable certificate of analysis should define the accepted limits for the intended grade.
PROPERTIES
Chemical Name: Benzoic acid, 4-nitro-
Common Name: 4-Nitrobenzoic acid
Alternative Common Name: p-Nitrobenzoic acid
IUPAC Name: 4-Nitrobenzoic acid
CAS Number: 62-23-7
EC Number: 200-526-2
PubChem CID: 6108
ChEBI Identifier: CHEBI:262350
Molecular Formula: C₇H₅NO₄
Condensed Formula: HOOCC₆H₄NO₂
Molecular Weight: 167.12 g/mol
Exact Molecular Weight: Approximately 167.0219 Da
InChIKey: OTLNPYWUJOZPPA-UHFFFAOYSA-N
Chemical Family: Nitroaromatic carboxylic acids
Functional Groups: Carboxylic acid and aromatic nitro group
Substitution Pattern: Para or 1,4-substitution
Physical State: Crystalline solid
Appearance: White to pale-yellow crystals
Odor: Odorless
Melting Point: Approximately 242°C
Decomposition Temperature: Approximately 350°C
Stable Atmospheric Boiling Point: Not applicable because decomposition occurs on strong heating
Density: Approximately 1.61 g/cm³
Water Solubility at 25°C: Approximately 0.03 g/100 mL
Water-Solubility Classification: Poorly soluble
Vapor Pressure at 50°C: Approximately 1 Pa
Log Pow: Approximately 1.89
Flash Point: Approximately 201°C
Flash-Point Method: Closed cup
Autoignition Temperature: Approximately 300°C
Lower Explosive Limit: Approximately 1.8% by volume for airborne combustible material
Dust-Explosion Potential: Possible when fine powder is dispersed in air
Electrostatic-Charging Potential: Possible during dry powder handling
Combustibility: Combustible
Primary Function: Organic synthesis intermediate
Additional Functions: Analytical reference, carboxylate source, ligand precursor, acidic additive, and crystal-engineering reagent
Primary Industrial Applications: Pharmaceuticals, dyes, pigments, specialty organic chemicals, and polymer intermediates
Primary Laboratory Applications: Organic synthesis, catalysis, analytical chemistry, coordination chemistry, and materials research
Acid–Base Behavior: Forms 4-nitrobenzoate salts with bases
Reduction Product: 4-Aminobenzoic acid under suitable selective conditions
Esterification Products: Alkyl and multifunctional 4-nitrobenzoate esters
Amidation Products: 4-Nitrobenzamide and substituted 4-nitrobenzamides
Hazard Classification Summary: Causes skin and eye irritation and may cause respiratory irritation
Short-Term Inhalation Effect: Coughing and respiratory irritation
Short-Term Skin Effect: Redness and irritation
Short-Term Eye Effect: Redness and irritation
Ingestion Effects: Nausea and vomiting
Repeated-Exposure Concern: Possible reproductive or developmental toxicity based on animal data
Chemical Stability: Stable under recommended storage conditions
Incompatible Materials: Strong oxidizing agents, reducing agents, bases, and potassium hydroxide
Hazardous Decomposition Products: Nitrogen oxides, carbon oxides, smoke, and irritating or toxic fumes
Recommended Storage: Cool, dry, well-ventilated, and separated from incompatible materials
Current Data Requirement: Confirm purity specifications, hazard classification, occupational requirements, transport status, and shelf life from the current grade-specific documentation.
FIRST AID
Inhalation:
Move the affected person immediately to fresh air.
Keep the person at rest in a position comfortable for breathing.
Avoid further exposure to Benzoic acid, 4-nitro- dust, smoke, or thermal-decomposition fumes.
Obtain medical attention if coughing, respiratory irritation, breathing discomfort, headache, or other symptoms develop or persist.
Skin Contact:
Remove contaminated clothing and footwear.
Rinse the affected skin with plenty of water.
Wash the skin thoroughly with soap and water.
Obtain medical attention if redness, pain, irritation, or other symptoms persist.
Wash contaminated clothing thoroughly before reuse.
Eye Contact:
Rinse the eyes immediately with plenty of clean, gently flowing water.
Hold the eyelids open to ensure complete irrigation.
Remove contact lenses when present and easy to do, then continue rinsing.
Continue rinsing for at least several minutes.
Obtain medical attention if redness, pain, tearing, blurred vision, or irritation persists.
Ingestion:
Rinse the mouth thoroughly with water.
Do not induce vomiting unless directed by qualified medical personnel.
Never give anything by mouth to an unconscious or convulsing person.
Obtain medical attention because nausea and vomiting may occur.
Provide the current Benzoic acid, 4-nitro- Safety Data Sheet to medical personnel.
Note to Physicians:
No substance-specific antidote should be assumed.
Provide supportive care and treat according to the patient’s symptoms and clinical condition.
Assess the eyes, skin, respiratory tract, and gastrointestinal system following significant exposure.
Consider possible exposure to decomposition products when the incident involved fire or excessive heating.
Use the current grade-specific Safety Data Sheet and poison-center guidance as the primary medical references.
HANDLING AND STORAGE
Handling:
Handle Benzoic acid, 4-nitro- in accordance with good industrial-hygiene and chemical-safety practices.
Review the current technical specification and Safety Data Sheet before opening or processing the material.
Avoid unnecessary contact with the skin, eyes, and clothing.
Do not breathe dust, smoke, or thermal-decomposition fumes.
Use enclosed charging, weighing, transfer, and sampling systems wherever practicable.
Avoid pouring, grinding, sweeping, or pneumatic-transfer methods that generate uncontrolled dust.
Use clean, dry, and chemically compatible equipment.
Keep Benzoic acid, 4-nitro- away from open flames, sparks, static discharge, and hot surfaces.
Prevent accumulation of powder on floors, beams, ledges, machinery, and ventilation equipment.
Wash the hands, face, and exposed skin thoroughly after handling.
Do not eat, drink, or smoke in areas where Benzoic acid, 4-nitro- is handled.
Keep containers tightly closed when the material is not being sampled or transferred.
Ventilation:
Provide effective general ventilation in storage and processing areas.
Use local exhaust ventilation at weighing stations, charging points, mills, mixers, reactors, dryers, and packaging equipment.
Capture dust at its source rather than allowing it to spread through the workplace.
Use dust-collection equipment suitable for combustible particulate material.
Prevent recirculation of contaminated air unless it has been adequately filtered.
Provide additional ventilation when Benzoic acid, 4-nitro- is heated or processed in confined equipment.
Use suitable particulate respiratory protection when engineering controls cannot adequately limit exposure.
Select respiratory equipment through a documented occupational-exposure assessment.
Inspect and maintain ventilation systems regularly to prevent dust accumulation.
Storage:
Store Benzoic acid, 4-nitro- in tightly closed and correctly labeled containers.
Keep the material in a cool, dry, and well-ventilated location.
Protect Benzoic acid, 4-nitro- from heat, flames, sparks, moisture, contamination, and physical damage.
Keep Benzoic acid, 4-nitro- separated from strong oxidizing agents, reducing agents, bases, and incompatible chemicals.
Provide strict segregation from potassium hydroxide because hazardous reaction or explosion may occur.
Keep the material separated from food, beverages, animal feed, medicines, and personal items.
Prevent water, dirt, metal residues, alkalis, reductants, and oxidants from entering opened containers.
Carefully reseal partially used containers immediately after sampling or transfer.
Use first-in, first-out stock rotation within the applicable shelf life.
Inspect stored material for damaged packaging, discoloration, caking, contamination, or moisture uptake before use.
Spill and Leak Procedures:
Restrict access to the affected area.
Remove unnecessary and unprotected personnel.
Eliminate ignition sources when this can be done safely.
Avoid dry sweeping or compressed-air cleaning that disperses dust.
Provide effective ventilation before beginning recovery operations.
Wear suitable gloves, protective clothing, eye protection, and particulate respiratory protection.
Prevent Benzoic acid, 4-nitro- from entering drains, sewers, soil, groundwater, or surface water.
Carefully collect spilled material using a suitable vacuum system or low-dust mechanical method.
Sweep material gently into covered and correctly labeled containers when vacuum recovery is unavailable.
Avoid contact between recovered material and incompatible bases, oxidants, or reducing agents.
Clean the affected area without creating airborne dust.
Dispose of recovered material and contaminated cleaning residues through an authorized waste-management route.
Handling Precautions:
Wear chemical-resistant protective gloves.
Use safety spectacles with side protection or tightly fitting chemical goggles.
Wear a face shield in addition to goggles where solution splashing or heavy dust exposure is reasonably foreseeable.
Use protective clothing and closed chemical-resistant footwear.
Provide accessible eyewash and emergency-shower equipment near major handling areas.
Use a particulate-filter respirator adapted to the airborne concentration when respiratory protection is required.
Ground and bond conductive equipment where electrostatic or combustible-dust hazards have been identified.
Inspect containers, seals, valves, transfer equipment, ventilation systems, and dust collectors before use.
Do not mix Benzoic acid, 4-nitro- with potassium hydroxide, strong oxidants, strong reducing agents, or unfamiliar bases without a documented compatibility assessment.
Avoid uncontrolled heating because decomposition produces nitrogen oxides and other hazardous fumes.
Prevent environmental release during handling, cleaning, transport, and waste disposal.
Review the current Benzoic acid, 4-nitro- technical specification, Safety Data Sheet, certificate of analysis, occupational requirements, and applicable regulations before use.
