4-Amino-3-nitrobenzoic acid

4-Amino-3-nitrobenzoic acid (CAS 1588-83-6) is a high-purity nitro-substituted aminobenzoic acid intermediate widely used in pharmaceutical synthesis, organic chemistry research, dye manufacturing, and fine chemical production. This compound features an amino group at the para-position and a nitro group at the meta-position of the benzoic acid structure, making it a versatile building block for the development of complex organic molecules and active pharmaceutical ingredients (APIs). As a key intermediate in reduction reactions, condensation chemistry, and functional group transformations, it exhibits excellent reactivity in catalytic hydrogenation, amide coupling, and electrophilic aromatic substitution pathways. Our product is manufactured under strict quality control standards, ensuring a purity of ≥98%, making it ideal for pharmaceutical manufacturing, medicinal chemistry research, dye synthesis, and scale-up production. This compound is particularly valuable in the synthesis of pharmaceuticals containing aminobenzoic acid scaffolds, photochemical intermediates, and agrochemical precursors. As a reliable benzene derivative intermediate, it serves as an important precursor for constructing nitro-amino functionalized aromatic systems in drug discovery and specialty chemical development programs.

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Product Name	4-Amino-3-nitrobenzoic acid
CAS Number	1588-83-6
Chinese Name	4-氨基-3-硝基苯甲酸
Synonyms	3-Nitro-4-aminobenzoic acid; 4-Amino-3-nitrobenzenecarboxylic acid; Benzoic acid, 4-amino-3-nitro-; 3-Nitro-p-aminobenzoic acid; 4-Carboxy-2-nitroaniline; 2-Nitro-4-aminobenzoic acid; 4-Amino-m-nitrobenzoic acid; ANBA
Chinese Synonyms	3-硝基-4-氨基苯甲酸; 4-氨基-3-硝基苯甲酸; 邻硝基对氨基苯甲酸; 2-硝基-4-氨基苯甲酸; 4-羧基-2-硝基苯胺
Molecular Formula	C₇H₆N₂O₄
Molecular Weight	182.13 g/mol
Purity	≥ 98% (HPLC)
Product Category	Pharmaceutical Intermediates / Benzene Derivatives / Nitrobenzoic Acids
Appearance	Yellow to Orange Crystalline Powder
Melting Point	245-248°C (decomposition, literature)
Storage Conditions	Store in a cool, dry, well-ventilated area away from light and moisture. Keep container tightly closed. Protect from strong oxidizing agents and reducing agents.
Shelf Life	24 months under recommended storage conditions
Packaging	1kg/foil bag, 5kg/drum, 25kg/drum, or customized according to customer requirements
Applications	Pharmaceutical intermediates, organic synthesis, API manufacturing, dye intermediates, photochemical research, nitro reduction reactions, amide coupling, agrochemical intermediates
Reactivity	Suitable for catalytic hydrogenation (nitro to amino), amide bond formation, esterification, electrophilic aromatic substitution, and diazotization reactions