CAS Registry Number

CAS 99-96-7 — 4-Hydroxybenzoic acid

4-Hydroxybenzoic acid is an aromatic carboxylic acid widely used as a precursor in the synthesis of pharmaceuticals, preservatives (e.g., parabens), and agrochemicals. It serves as a key intermediate in organic chemistry for producing esters, dyes, and UV absorbers. This white crystalline solid has a CAS number of 99-96-7, a molecular formula of HOC6H4CO2H, and a molecular weight of 138.12 g/mol. Store at ambient conditions, but handle with caution—it carries a **Danger** signal word due to potential health risks. Molekula supplies 4-hydroxybenzoic acid from research to bulk quantities with full documentation and ISO 9001:2015 traceability.