Preservatives & Biocides
REACH
Bromochlorodimethylhydantoin
CAS Number
32718-18-6
EC Number
251-171-5
What is Bromochlorodimethylhydantoin?
Bromochlorodimethylhydantoin (CAS 32718-18-6), commonly known as BCDMH, is a halogen-release biocide used to control microbial growth in water systems and formulated products.
Where is Bromochlorodimethylhydantoin used?
- Water treatment: active disinfectant in cooling towers
- Swimming pools and spa systems: controlled halogen release maintains sanitization without handling risks of liquid chlorine or volatile gases
- Personal care: preservative in rinse-off products such as shampoos and body washes
- Industrial and institutional cleaning: bleaching and sanitizing agent in hard surface disinfectants and laundry formulations
- Healthcare: instrument disinfection and surface sanitization
- It delivers both bromine and chlorine upon dissolution, providing broad-spectrum disinfection across a range of pH conditions.
Commercial specifications
- Purity: 96% to 99% active content depending on application
- Tablet sizes: various for automated feeders
Other Names (Synonyms)
2,4-Imidazolidinedione, bromochloro-5,5-dimethyl-|1,3-Dibromo-5,5-dimethylhydantoin|5-(bromomethyl)-5-(chloromethyl)imidazolidine-2,4-dione|Bromochloro-5,5-dimethylimidazolidine-2,4-dione
What are the physical properties of Bromochlorodimethylhydantoin?
Melting Point 159-163 °C
Appearance Briquette, Powder, Granular
How is Bromochlorodimethylhydantoin 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
H314 Causes severe skin burns and eye damage
H317 May cause an allergic skin reaction
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 Bromochlorodimethylhydantoin?
UN Number 3085
ADR Class 5.1
Packing Group II
WGK (Germany) 2