CAS Registry Number

CAS 543-27-1 — Isobutyl chloroformate

Isobutyl chloroformate (CAS 543-27-1) is a reactive acyl chloride derivative used primarily as an intermediate in organic synthesis, particularly in peptide coupling and the preparation of carbamates. Its high reactivity makes it valuable in pharmaceutical and fine chemical manufacturing. This compound has a molecular formula of C5H9ClO2 and a molecular weight of 136.58 g/mol. It must be stored at ambient conditions and handled with caution, as it carries a **Danger** signal word due to its corrosive and hazardous properties. Molekula supplies isobutyl chloroformate from research to bulk quantities with full documentation and ISO 9001:2015 traceability.