Preservatives & Biocides
REACH
3-bromo-1-chloro-5,5-dimethylhydantoin
CAS Number
126-06-7
EC Number
204-766-9
What is 3-bromo-1-chloro-5,5-dimethylhydantoin?
3-Bromo-1-chloro-5,5-dimethylhydantoin (CAS 126-06-7), commonly known as BCDMH, is a halogenated hydantoin compound that functions as a dual-action biocide; it releases both bromine and chlorine upon contact with water.
Where is 3-bromo-1-chloro-5,5-dimethylhydantoin used?
- Water treatment: controlled-release disinfectant and oxidizer in pools, spas, cooling towers and process water systems
- Food processing: sanitizing agent for equipment and surfaces, effective in wash water
- Personal care and cosmetics: preservative and antimicrobial active in rinse-off formulations and industrial cleaning products
- Pulp and paper operations apply it for slime control in process water.
Commercial specifications
- Purity specifications typically at 96% or higher active halogen content
- Packaging from small drum quantities to bulk totes
Other Names (Synonyms)
BCDMH|3-Bromo-1-chloro-5,5-dimethylimidazolidine-2,4-dione|2,4-Imidazolidinedione, 3-bromo-1-chloro-5,5-dimethyl-|3-Bromo-1-chloro-5,5-dimethyl-2,4-imidazolidinedione|Hydantoin, 3-bromo-1-chloro-5,5-dimethyl-|1-Chloro-3-bromo-5,5-dimethylhydantoin
What are the physical properties of 3-bromo-1-chloro-5,5-dimethylhydantoin?
Melting Point 163-164 °C
Boiling Point 232.7±23.0 °C(Predicted)
Density 1.7598 (rough estimate)
Refractive Index 1.6110 (estimate)
How is 3-bromo-1-chloro-5,5-dimethylhydantoin classified and handled safely? Learn More
Danger
GHS03· Oxidizing GHS05· Corrosive GHS07· Irritant GHS09· Environmental Hazard
Hazard Statements
H272 May intensify fire; oxidizer
H302 Harmful if swallowed
H312 Harmful in contact with skin
H314 Causes severe skin burns and eye damage
Precautionary Statements
P210 Keep away from heat, hot surfaces, sparks, open flames and other ignition sources. No smoking.
P220 Keep away from clothing and other combustible materials.
P260 Do not breathe dust/fume/gas/mist/vapours/spray.
P261 Avoid breathing dust/fume/gas/mist/vapours/spray.
Which trade and regulatory codes apply to 3-bromo-1-chloro-5,5-dimethylhydantoin?
UN Number 3085
ADR Class 5.1
Packing Group II
WGK (Germany) 3