1-Bromo-3-chloro-5,5-dimethylhydantoin

1-Bromo-3-chloro-5,5-dimethylhydantoin (BCDMH, CAS 126-06-7) is a halogenated hydantoin compound used as an active biocide and oxidising agent. It is sold under trade names including Agribrom, Halobrom, and Halogene, and carries the EC number 204-766-9. No E-code designation applies to this substance.

In water treatment, BCDMH releases both bromine and chlorine upon contact with water, providing dual-halogen disinfection effective against bacteria, algae, and biofilm in cooling towers and recreational water systems. In personal care formulations, it functions as a preservative and antimicrobial active, and in food-contact surface sanitation it delivers controlled oxidative kill against pathogens.

BCDMH is supplied in technical and industrial grades, typically as tablets, granules, or powder. It is subject to REACH registration requirements within the EU and falls under biocidal product regulations (BPR) for relevant end uses. Buyers should confirm grade specifications and SDS documentation prior to procurement.