Safety Reference
Danger
H300Fatal if swallowed
H301Toxic if swallowed
H310
Restricted or banned substances
Substances on this list are banned or restricted under the named regulation. This page is a compliance reference — verify your obligations under applicable law.
CAS 55-98-1
alkylating agent
Busulfan is an active pharmaceutical ingredient used in the manufacture of medications. It is a bifunctional alkylating agent that has been associated with cancer and developmental toxicity according to authoritative sources.
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.
The international HS code for Busulfan (CAS 55-98-1) is 2905.39.
2905.39
2905 39 95
Classification per the EU customs inventory ECICS (2026-07 snapshot, HS 2022). National tariff lines and product form can affect the final classification.
4-methylsulfonyloxybutyl methanesulfonate
COVZYZSDYWQREU-UHFFFAOYSA-N
CS(=O)(=O)OCCCCOS(=O)(=O)C