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Chlorosulfonyl isocyanate

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Chlorosulfonyl isocyanate molecular structure
Molecular structure

The Sigma-Aldrich catalog lists 5 grades and pack sizes of Chlorosulfonyl isocyanate (CAS 1189-71-5). Pick the code you need and request a quote for price and lead time from Klar Chem.

CAS1189-71-5
Molecular formulaCClNO3S
Molecular weight141.53 g/mol
IUPAC nameN-(oxomethylidene)sulfamoyl chloride
SynonymsSulfuryl chloride isocyanate · Chlorosulphonyl isocyanate · [(CHLOROSULFONYL)IMINO]METHANONE · RefChem:125518 · sulfurisocyanatidic chloride · N-Carbonylsulfamyl chloride
Safety & Hazards (GHS) Danger
Corrosive Corrosive Irritant Irritant Health hazard Health hazard
  • H302 Harmful if swallowed
  • H314 Causes severe skin burns and eye damage
  • H334 May cause allergy or asthma symptoms or breathing difficulties if inhaled

⚠️ For information only (source: EU CLP harmonised classification and ECHA notifications, via PubChem); not a substitute for the official Safety Data Sheet (SDS).

Catalog codes and grades

Brand Product / grade Code
Sigma CHLOROSULFONYL ISOCYANATE 691399-10KG
691399-1KG		 Request Quote
Sigma CHLOROSULFONYL ISOCYANATE, 98% 142662-100G
142662-1KG
142662-25G		 Request Quote

For information only; specifications and availability are confirmed at quotation. Prices are not listed.