Agrochemicals

1,3-Dichloro-5,5-dimethylhydantoin

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Category：Agrochemicals Own Brand：MT /MOQ:100KG /From China/ B2B only.

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Introduction

1,3-Dichloro-5,5-dimethylhydantoin (DCDMH, CAS No. 118-52-5)

1. Basic Information

IUPAC Name: 1,3-Dichloro-5,5-dimethylimidazolidine-2,4-dione
Synonyms:
- DCDMH
- Halane® (commercial name)
CAS Number: 118-52-5
Molecular Formula: C₅H₆Cl₂N₂O₂
Molecular Weight: 197.02 g/mol
Appearance: White crystalline powder
Odor: Strong chlorine-like odor

2. Physical and Chemical Properties

Property	Value
Melting Point	132–135°C (270–275°F)
Solubility (25°C)	– Water: 0.2 g/100 mL
	– Organic solvents: Soluble in acetone, chloroform
Active Chlorine	56–60% (theoretical: 72%)
pH (1% solution)	3.0–5.0 (acidic)

3. Chemical Structure

       Cl  
       |  
  O=C-N-CH₃  
   |   |  
  N   C=O  
   |   |  
  CH₃ Cl

4. Hazards (GHS Classification)

Oxidizing Properties: May intensify fire (H272)
Acute Toxicity:
- Harmful if swallowed (H302)
- Causes severe skin burns (H314)
Environmental: Very toxic to aquatic life (H400)
NFPA Rating: Health 3, Flammability 0, Reactivity 2 (Oxidizer)

5. Storage and Handling

Storage:
- Keep in original containers away from heat/flames
- Store separately from acids, ammonia, and reducing agents
Handling:
- Use chemical-resistant gloves (neoprene/Viton®) + face shield
- Work in well-ventilated areas

6. Applications

Water Treatment:
- Slow-release disinfectant for swimming pools
Bleaching Agent:
- Textile and pulp bleaching
Organic Synthesis:
- Chlorinating agent for pharmaceuticals

Disclaimer:

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