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

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1,3-Dichloro-5,5-dimethyl hydantoin (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 slightly 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.

CAS No.:


Molecular Formula:


Molecular Weight:


Structure Formula:

dibromo dimethyl hydantoin structure formula


AppearanceWhite crystal powder
Effective chlorine68% Min.
Melting Point130-133 deg. C
Drying Loss1.0% Max.
Instant or slow-releasing glanular:8-30, Instant of slow-releasing tablet:20g 200g, etc.


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

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

Packing and Storage:

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

25kg paper bags

Keep it cool and dry. Avoid putting together within jurant for fear of pollution. Validity for one year.


dibromo dimethyl hydantoin, dimethyl hydantoin, dimethylhydantoin.


Contact us if you want to get the latest DCDMH price and download DCDMH SDS/MSDS.