CAS Registry Number

CAS 156-38-7 — 4-Hydroxyphenylacetic acid

4-Hydroxyphenylacetic acid is a phenolic carboxylic acid used in pharmaceutical and biochemical research. It serves as an intermediate in the synthesis of active pharmaceutical ingredients and as a metabolite in metabolic studies. Available in powder form with a purity of ≥98%, it has a CAS number of 156-38-7, molecular formula C8H8O3, and molecular weight of 152.15 g/mol. Stored at ambient temperature, it carries a warning signal word due to potential irritant properties. Molekula supplies 4-Hydroxyphenylacetic acid from research to bulk quantities with full documentation and ISO 9001:2015 traceability.