C2Cl4O2
197.8 g/mol
Industrial ChemicalDanger
Trichloromethyl chloroformate
CAS503-38-8EC207-965-9
Category
Industrial Chemical
Compound Class
Halocarbon
Primary Use
Chemical intermediate and military poison gas
Trichloromethyl chloroformate, commonly known as diphosgene, is an organic compound used as a chemical intermediate and a military poison gas. It is a colorless liquid with a pungent odor, and its structure features an ether linkage and multiple chlorine atoms.
Chemical intermediate for organic synthesisMilitary poison gasSynthesis of isocyanides
Content scope: Information here supports chemical identification and industrial supply, research, and manufacturing contexts. It is not a therapeutic claim, medical advice, or drug-use instructions.
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Related Compounds
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Synthetic intermediate for pharmaceutical or agrochemical research
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CAS504-02-9
Chemical intermediate for synthesis
ReferenceSame Category
2,6-dimethylpiperidine
CAS504-03-0
Industrial chemical intermediate
Safety Reference
Danger
H300Fatal if swallowed
H314Causes severe skin burns and eye damage
H330Fatal if inhaled
Regulatory Compliance1
- CN Catalogue of Hazardous ChemicalsCNRegulation
Customs Tariff Classification
The international HS code for Trichloromethyl chloroformate (CAS 503-38-8) is 2915.90.
HS code (international, 6-digit)
2915.90
EU CN code (8-digit)
2915 90 90
Classification per the EU customs inventory ECICS (2026-07 snapshot, HS 2022). National tariff lines and product form can affect the final classification.
Identifiers
IUPAC Name
trichloromethyl carbonochloridate
InChIKey
HCUYBXPSSCRKRF-UHFFFAOYSA-N
SMILES
C(=O)(OC(Cl)(Cl)Cl)Cl
Synonyms (19)
- Difosgen
- Difosgen [Czech]
- Diphosgen
- Perchloromethyl formate
- Trichloromethyl chloroformate
- di-Phosgene
- trichioromethyl chloroformate
- tricloromethyl chloroformate
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