CH3ClO2S
114.55 g/mol
Pharmaceutical IntermediateDanger
Methanesulfonyl chloride
CAS124-63-0EC204-706-1
Category
Pharmaceutical Intermediate
Compound Class
Other
Primary Use
Pharmaceutical Intermediate
Methanesulfonyl chloride is a pale yellow corrosive liquid that is denser than water and insoluble in water. It is very toxic by ingestion, inhalation, or skin absorption.
Chemical intermediate for drug synthesisIntermediate in the production of flame retardants and other chemicalsStabilizer for liquid sulfur trioxide
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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Safety Reference
Danger
H290May be corrosive to metals
H300Fatal if swallowed
H301Toxic if swallowed
H311Toxic in contact with skin
H302Harmful if swallowed
H312Harmful in contact with skin
H314Causes severe skin burns and eye damage
H317May cause an allergic skin reaction
H318Causes serious eye damage
H330Fatal if inhaled
H335May cause respiratory irritation
H412Harmful to aquatic life with long lasting effects
H370Causes damage to organs
Regulatory Compliance1
- CN Catalogue of Hazardous ChemicalsCNRegulation
Customs Tariff Classification
The international HS code for Methanesulfonyl chloride (CAS 124-63-0) is 2904.99.
HS code (international, 6-digit)
2904.99
EU CN code (8-digit)
2904 99 00
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
methanesulfonyl chloride
InChIKey
QARBMVPHQWIHKH-UHFFFAOYSA-N
SMILES
CS(=O)(=O)Cl
Synonyms (44)
- Chloro methyl sulfone
- METHYLSULFONYL CHLORIDE
- MeSO2-Cl
- Mesyl chloride
- Mesylchoride
- Metanesulfonyl chloride
- Methanesulfonic acid chloride
- Methanesulfonyl chloride
- Methanesulfonyl chlorine
- MethanesulfonylChloride-d3
- Methanesulfuryl chloride
- Methanesulphonyl chloride
- Methanesulphonyl cloride
- Methansulfonylchlorid
- Methansulfonylchloride
- Methyl sulfochloride
- Ms-Cl
- mesyl chlorid
- mesylic acid chloride
- methanesufonylchloride
- methanesuiphonyl chloride
- methanesulfonic acid chlorid
- methanesulfonic chloride
- methanesulfonlychloride
- methanesulfonoyl chloride
- methanesulfonyl choride
- methanesulfonyl cloride
- methanesulfonylchlorid
- methanesulforiylchloride
- methanesulonyl chloride
- methanesulphonic chloride
- methanesulphonyl choride
- methansulphonylchloride
- methariesulfonyl chloride
- methylsufonyl chloride
- methylsulfonic chloride
- methylsulfonyl choride
- methylsulphonyl chloride
- methysulfonyl chloride
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