Properties4-Aminobenzoic acid is soluble in hot water, ethyl ether, ethyl acetate, ethanol and acetic acid, insoluble in water, benzene,petroleum ether.
Index name Industrial grade Pharma gradeAppearance White crystalline powder White or off-white crystalline powder
Melting point,℃ 186~189 186~189
Loss on drying,% ≤0.5 ≤0.2
Assay,% ≥99.0 98.5~101.5
Volatile diazoizable substances,% / ≤0.002
Residue on ignition,% / ≤0.1
Ordinary impurities,% / ≤1
Heavy metals,% / ≤0.002
PABA is used as Dyes and Pharmaceutical Intermediates. It is used to product red M-80, M-10B, reactive red violet X-2R dye and Prepare the production of drug of cyano acid, namely 4-carboxyl benzylamine. PABA can also be used as a sunscreen Agent.