4-Nitrobenzoic Acid
4-Nitrobenzoic Acid (CAS: 62-23-7) is an aromatic carboxylic acid supplied as a white to pale yellow crystalline powder.
The para-nitro group withdraws electron density, which activates the ring towards nucleophilic substitution and strengthens the acidity of the carboxyl group, so the compound is a useful substrate for reduction to 4-aminobenzoic acid and for esterification studies.
• Pharmaceutical intermediates: reduced to 4-aminobenzoic acid, a precursor of local anaesthetics and folic acid derivatives.
• Dye and pigment synthesis: an intermediate for azo dyes and photographic coupling compounds.
• Organic synthesis: a standard substrate for studying nucleophilic aromatic substitution and esterification.
• Analytical chemistry: used as a reference acid for titration, pH and spectrometry calibration.
Product Name: 4-Nitrobenzoic Acid
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