4-Nitrobenzoic Acid — CAS 62-23-7
4-Nitrobenzoic Acid — CAS 62-23-7
4-Nitrobenzoic acid (p-NBA, CAS 62-23-7) is a nitroaromatic carboxylic acid and a widely used chemical intermediate across pharmaceutical, dye, and specialty chemical manufacturing sectors. UAB An Group Export supplies it in technical and synthesis grades, matched to each customer's process and application requirements.
It is used primarily as a synthesis building block for the production of pharmaceutical active ingredients, agrochemicals, dye intermediates, and specialty chemicals through reduction, esterification, amidation, and other functional group transformations. Its combination of an electron-withdrawing nitro group and a carboxylic acid functional group gives it high synthetic versatility across a wide range of downstream chemical transformations.
For qualified industrial buyers, supply is coordinated around grade, purity, volume, packaging, and delivery destination, in line with applicable product and handling regulations. Bulk and commercial orders are both handled — send your requirements and we'll prepare a quote covering supply, packaging, logistics, and delivery.
Key Applications
Pharmaceutical Intermediate SynthesisA widely used building block in pharmaceutical synthesis — the nitro group can be selectively reduced to an amine to give 4-aminobenzoic acid (PABA) and related intermediates, and the carboxylic acid group can be esterified or converted to amides for a range of pharmaceutical scaffold constructions.
Dye & Pigment ManufacturingUsed as an intermediate in the synthesis of azo dyes, disperse dyes, and specialty colorants for textile and industrial applications requiring a nitrobenzoic acid scaffold.
Agrochemical ManufacturingUsed as a building block in the synthesis of select herbicides, fungicides, and other agrochemical active ingredients requiring a nitrobenzoic acid intermediate.
Specialty Chemical SynthesisUsed across a range of organic synthesis applications requiring a bifunctional nitroaromatic carboxylic acid starting material for selective functionalization reactions including reduction, esterification, and condensation.
Analytical ChemistryUsed as a reference standard and reagent in select analytical chemistry and quality control applications.
3-Nitrobenzoic Acid vs. 4-Nitrobenzoic Acid — Which Isomer Do You Need?
4-Nitrobenzoic acid (para, CAS 62-23-7) and 3-nitrobenzoic acid (meta, CAS 121-92-6) are positional isomers with different electronic properties and downstream synthesis applications. The para isomer is preferred where the nitro and carboxylic acid groups need to be in conjugation for maximum electronic activation — the dominant commercial isomer for pharmaceutical and dye intermediate synthesis. The meta isomer is preferred where a non-conjugated substitution pattern is required for specific synthesis pathways or polymer applications. Both are available from UAB An Group Export — specify your required isomer and downstream synthesis application in your quotation request and we will confirm the appropriate grade and supply option.
Supply & Packaging
Supplied according to your required grade and purity, quantity, packaging, and destination. 4-Nitrobenzoic acid is a pale yellow to yellow crystalline solid at room temperature with a melting point of approximately 239–242°C. As a harmful solid with nitroaromatic characteristics, packaging, transport, and handling are arranged according to applicable dangerous-goods requirements, typically in sealed, moisture-proof drums or bags with appropriate hazmat labeling and documentation.
Storage must be in sealed containers away from heat, reducing agents, strong bases, and incompatible materials. Skin contact and inhalation of dust must be avoided — appropriate PPE including chemical-resistant gloves, eye protection, and dust respiratory protection is required during all handling operations.
Product Documentation
Available on request, depending on the specific product and supply arrangement:
Safety Data Sheet (SDS), including nitroaromatic handling and exposure control information
Certificate of Analysis (CoA), including purity, melting point, and color specification
Technical Data Sheet (TDS)
Product specifications
Dangerous goods declaration
Shipping and transport documentation
Compliance statement:
"All orders are subject to business registration verification and end-use declaration prior to confirmation. Buyers are responsible for verifying that the intended end use and market application comply with all applicable regulations, dangerous-goods handling requirements, and occupational health and safety obligations in their jurisdiction. UAB An Group Export reserves the right to request additional end-use declarations or supporting documentation and to decline any order where end use, destination, or buyer information cannot be adequately confirmed."
Request a Quote
Whether you need 4-nitrobenzoic acid for pharmaceutical intermediate synthesis, dye manufacturing, agrochemical production, or another qualified industrial synthesis purpose, provide your requirements and our team will review the available supply options.
For a quotation, please provide: company name and registration → end-use application and downstream product → required grade and purity → quantity → packaging → delivery country/city or port → required delivery timeframe