Benzoyl peroxide

Benzoyl peroxide (CAS 94-36-0) is an organic peroxide compound belonging to the oxidizers and peroxides category, commercially available under trade names including Lucidol, Persadox, Benoxyl, and Oxylite. It carries no assigned E-code and is identified under EC number 202-327-6 with the molecular formula C14H10O4.

In polymer manufacturing, benzoyl peroxide acts as a free-radical initiator, decomposing under heat to generate radicals that trigger chain-growth polymerization and crosslinking of resins such as polyester and silicone. In pharmaceutical and cosmetic formulations, it functions as an antimicrobial agent by releasing reactive oxygen species that disrupt bacterial cell membranes, making it a standard active in acne treatment products.

Benzoyl peroxide is supplied in technical, pharmaceutical (Ph.Eur.), and food-contact grades, with REACH compliance documentation available. It is handled as a wetted or diluted material to meet transport safety requirements under ADR classifications. Standard packaging formats include fiber drums and polyethylene-lined containers.