slightly yellow crystalline powder
1-Bromo-3-Chloro-5,5-Dimethylhydantoin (BCDMH) is a bromine-based compound widely used for its disinfectant and biocidal properties.
Moderately toxic by ingestion and skin con-
tact.
This chlorinated and brominated product is employed
in agriculture as a fungicide, for wood preservation.
When used to sanitize pools and spas, releasing both
chlorine and bromine derivatives, it can induce irritant
or allergic contact dermatitis.
The initial threshold screening level (ITSL) for 1-Bromo-3-chloro-5,5-dimethylhydantoin is 2 μg/m3, based on an 8-hour averaging time.
