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  • 8.14752 - 1,3-Dichloro-5,5-dimethylhydantoine

8.14752 EMD Millipore


1,3-Dichloro-5,5-dimethylhydantoine for synthesis. CAS 118-52-5, pH 4.4 (H₂O) (HSDB)., for synthesis

Synonym: 1,3-Dichloro-5,5-dimethyl-2,4-imidazolidinedione

  • CAS Number 118-52-5

  • Linear Formula C₅H₆Cl₂N₂O₂

  • Molecular Weight 197.02 g/mol

  •  EC Number 204-258-7



Related Categories Biochemicals and Reagents More...
packaging   100 g in Glass bottle (8147520100)
solubility   0.5 g/l (HSDB)
density   1.5 g/cm3 (20 °C) (HSDB)
flash point   174 °C
mp   132 - 134 °C
pH   4.4 (H₂O) (HSDB)
LD 50 oral   LD50 Rat 542 mg/kg
LD 50 dermal   LD50 Rabbit > 20000 mg/kg
shipped in   ambient
storage temp.   Store below +30°C.
specifications   Assay (iodometric): ≥ 98.0 %
  Melting range (lower value): ≥ 130 °C
  Melting range (upper value): ≤ 133 °C
  Identity (IR): passes test

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Safety Information

HS Code 
2933 21 00
Hazard Statement(s) 
H272: May intensify fire; oxidizer.
H302: Harmful if swallowed.
H314: Causes severe skin burns and eye damage.
H410: Very toxic to aquatic life with long lasting effects.
Precautionary Statement(s) 
P221: Take any precaution to avoid mixing with combustibles, heavy-metal compounds, acids and alkalis.
P273: Avoid release to the environment.
P280: Wear protective gloves/ protective clothing/ eye protection/ face protection.
P301 + P330 + P331: IF SWALLOWED: Rinse mouth. Do NOT induce vomiting.
P305 + P351 + P338: IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
P308 + P310: IF exposed or concerned: immediately call a POISON CENTER or doctor/ physician.
Storage class 
5.1B Oxidizing hazardous materials
WGK 2 water endangering
Inorganic peroxides and oxidants as well as bromine and iodine should be rendered harmless by reduction with acidic sodium thiosulfate solution (Cat. No. 106513); container D or E. Slightly soluble oxidants should be collected separately in container E or I.
Hazard Pictogram(s) 
GHS03  GHS03
Hazard Pictogram(s) 
GHS05  GHS05
Hazard Pictogram(s) 
GHS07  GHS07
Hazard Pictogram(s) 
GHS09  GHS09
Hazard Symbols 
Corrosive  Corrosive
Hazard Symbols 
Dangerous for the environment  Dangerous for the environment
Hazard Symbols 
Oxidising  Oxidising
Declaration (railroad and road) ADR, RID 
UN 3085 , 5.1 (8), II
Declaration (transport by air) IATA-DGR 
UN 3085 , 5.1 (8), II
Declaration (transport by sea) IMDG-Code 
UN 3085 , 5.1 (8), II
Categories of danger 
oxidizing, harmful, corrosive
R Phrase 
R 8-22-34-50/53
Contact with combustible material may cause fire.Harmful if swallowed.Causes burns.Very toxic to aquatic organisms, may cause long-term adverse effects in the aquatic environment.
S Phrase 
S 26-36/37/39-45-60-61
In case of contact with eyes, rinse immediately with plenty of water and seek medical advice.Wear suitable protective clothing, gloves and eye/face protection.In case of accident or if you feel unwell, seek medical advice immediately (show the label where possible).This material and its container must be disposed of as hazardous waste.Avoid release to the environment. Refer to special instructions/ Safety data sheets.
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