Overview
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.
It delivers both bromine and chlorine upon dissolution, providing broad-spectrum disinfection across a range of pH conditions. In water treatment, it is the active disinfectant in cooling towers.
Swimming pools and spa systems utilize this compound where controlled halogen release maintains effective sanitization without the handling risks of liquid chlorine or other volatile gases.
Personal care formulators incorporate it as a preservative in rinse-off products such as shampoos and body washes. Its dual-halogen activity targets bacteria and fungi at low use concentrations.
Industrial and institutional cleaning products use it as a bleaching and sanitizing agent in hard surface disinfectants and laundry formulations to ensure high hygiene standards.
In healthcare settings, it is used in instrument disinfection and surface sanitization applications requiring reliable broad-spectrum efficacy and consistent performance in various environments.
BCDMH is supplied as compressed tablets, granules, and powder to suit different dosing equipment. Standard grades include technical and water treatment grades for industrial use.
Tablet forms are commonly available in various sizes for automated feeders. Purity specifications typically range from 96% to 99% active content depending on the intended application.
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Physical Properties
| Melting Point | 159-163 °C |
| Appearance | Briquette, Powder, Granular |
Safety & Handling
Danger GHS03 GHS05 GHS07 GHS09 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 H318 Causes serious eye damage H400 Very toxic to aquatic life H410 Very toxic to aquatic life with long lasting effects 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. P264 Wash … thoroughly after handling. P270 Do not eat, drink or smoke when using this product. P272 Contaminated work clothing should not be allowed out of the workplace. P273 Avoid release to the environment. P280 Wear protective gloves/protective clothing/eye protection/face protection. P316 Get emergency medical help immediately. P317 Get emergency medical help. P321 Specific treatment (see … on this label). P330 Rinse mouth. P363 Wash contaminated clothing before reuse. P391 Collect spillage. P405 Store locked up. P501 Dispose of contents/container in accordance with local regulations. P264+P265 Wash … thoroughly after handling. P301+P317 Get emergency medical help. P302+P352 IF ON SKIN: Wash with plenty of water. P304+P340 IF INHALED: Remove person to fresh air and keep comfortable for breathing. P333+P317 Get emergency medical help. P362+P364 Take off contaminated clothing and wash it before reuse. P370+P378 Use … for extinction. P301+P330+P331 Rinse mouth. Do NOT induce vomiting. P302+P361+P354 IF ON SKIN: Take off immediately all contaminated clothing. Rinse skin with water/shower. P305+P354+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
Trade & Regulatory
| UN Number | 3085 |
| ADR Class | 5.1 |
| Packing Group | II |
| WGK (Germany) | 2 |
Other Names
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Chemical Properties
- CAS Number
- 32718-18-6
- EC Number
- 251-171-5
- Mol. Weight
- 241.47
- Category
- Heterocyclic Compounds