CAS Registry Number

CAS 331-39-5 — 3,4-Dihydroxycinnamic acid (Caffeic acid)

3,4-Dihydroxycinnamic acid, commonly known as caffeic acid, is a natural phenolic compound found in plants, widely used in pharmaceuticals, cosmetics, and as a dietary supplement for its antioxidant and anti-inflammatory properties. It is also employed in food preservation and as a precursor in chemical synthesis. This white to light yellow crystalline powder has a CAS number of 331-39-5, a molecular formula of (HO)2C6H3CH=CHCO2H, and a molecular weight of 180.16. It can be stored at ambient conditions and carries a signal word of Warning for handling. Molekula supplies 3,4-Dihydroxycinnamic acid from research to bulk quantities with full documentation and ISO 9001:2015 traceability.

Also known as: Caffeic acid