1 3-Dichloro-5 5-dimethylhydantoin (DCDMH)

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1 3-Dichloro-5 5-dimethylhydantoin (DCDMH) is also known as dichloro dimethyl hydantoin. It is a white tetrahedral prism crystal powder (industrial products have various specifications such as granular and flake). It has a slight irritating smell of chlorine, which is easy to absorb moisture and is partially hydrolyzed after moisture absorption.

1 3-Dichloro-5 5-dimethyl hydantoin is easily soluble in organic solvents such as chloroform, dichloromethane, carbon tetrachloride, ethylene dichloride, symmetric tetrachloroethane, benzene, and concentrated sulfuric acid. The DCDMH turns brown when heated to the boiling point and burns quickly.

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Molecular Formula:


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Structure Formula:

dibromo dimethyl hydantoin structure formula


Item Index
Appearance White crystal powder
Effective chlorine 68% Min.
Melting Point 130-133 deg. C
Drying Loss 1.0% Max.
Instant or slow-releasing glanular:8-30, Instant of slow-releasing tablet:20g 200g etc.


DCDMH is mainly used as disinfectant and algae killer, killing germ, fungus, virus, algae, liver inflame virus, etc., with high stabilization, high content, bland light odor, slow-release, widely used.

  1. Sterilization for swimming pool and tap water
  2. Sterilization for aquaculture
  3. Sterilization for industrial water
  4. Sterilization of environment for hotels, hospitals, and other public places.

Packing and Storage:

1 3-Dichloro-5 5-dimethylhydantoin is packed in two layers: non-poisonous plastic sealed bag for inside, and paper-plastic multiple bags or cardboard barrel for outside.25Kg net each or by customer’s requirement.

Keep in cool and dry, avoid putting together within jurant for fear of pollution. Validity for one year.


dibromo dimethyl hydantoin, dimethyl hydantoin, dimethylhydantoin


If you want to get the latest DCDMH price and download DCDMH SDS/MSDS, contact us.