C6H14O6S2
246.3 g/mol
APIDanger
Busulfan
CAS55-98-1EC200-250-2
Category
API
Compound Class
Ester
Primary Use
Pharmaceutical Raw Material
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.
pharmaceutical intermediateresearch compound for myelogenous leukemia studiesinsect sterilant research
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.
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.
Relevant lists:California Proposition 65
CAS 55-98-1
Related Compounds
SimilarStructure SimilarSimilarity 0.74
Butyl methanesulfonate
CAS1912-32-9
alkylating agent
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pharmaceutical raw material
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Naphazoline hydrochloride
CAS550-99-2
pharmaceutical raw material
ReferenceSame Category
Cloprostenol sodium
CAS55028-72-3
pharmaceutical raw material
ReferenceSame Category
Acitretin
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pharmaceutical raw material
Safety Reference
Danger
H300Fatal if swallowed
H301Toxic if swallowed
H310Fatal in contact with skin
H315Causes skin irritation
H319Causes serious eye irritation
H330Fatal if inhaled
H335May cause respiratory irritation
H340May cause genetic defects
H350May cause cancer
H360May damage fertility or the unborn child
H373May cause damage to organs through prolonged or repeated exposure
H371May cause damage to organs
Regulatory Compliance1
- California Proposition 65USRegulation
Customs Tariff Classification
The international HS code for Busulfan (CAS 55-98-1) is 2905.39.
HS code (international, 6-digit)
2905.39
EU CN code (8-digit)
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.
Identifiers
IUPAC Name
4-methylsulfonyloxybutyl methanesulfonate
InChIKey
COVZYZSDYWQREU-UHFFFAOYSA-N
SMILES
CS(=O)(=O)OCCCCOS(=O)(=O)C
Synonyms (71)
- Busulfan (JP18/USP/INN)
- Busulfan, European Pharmacopoeia (EP)
- Busulfano [INN-Spanish]
- Busulfanum [INN-Latin]
- 1,4-Dimesyloxybutane
- 1,4-Dimethanesulfonoxybutane
- 1,4-Dimethylsulfonoxybutane
- 1,4-Dimethylsulfonyloxybutane
- 2041 C. B.
- BUSULFAN FRESENIUS KABI
- BUSULFAN [MART.]
- Bisulfex
- Busilvex
- Bussulfam
- Busulfan (Myleran, Busulfex)
- Busulfan CRS
- Busulfano
- Busulfanum
- Busulfex
- Busulfex IV
- Busulphan
- Busulphane
- Buzulfan
- C.B. 2041
- Citosulfan
- GT 41
- Glyzophrol
- Joacamine
- Leucosulfan
- Mablin
- Methanesulfonic
- Mielevcin
- Mielosan
- Mielucin
- Milecitan
- Mileran
- Misulban
- Misulfan
- Mitosan
- Mitostan
- Myeleukon
- Myeloleukon
- Myelosan
- Myelosanum
- Mylecytan
- Myleran
- Sulfabutin
- Sulphabutin
- Wellcome, Busulfan
- busulfan