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Busulfan

Drug ingredient

CAS 55-98-1

This chemical is an active pharmaceutical ingredient used in FDA-regulated drugs.

Molecular structure of 55-98-1
US productionNot reported
Import value, 2024$82M
Top sourceGermany 18%

This chemical is not on EPA’s Toxic Substances Control Act inventory, the list behind EPA’s production survey.

Why supply is unknown

Production is reported production, not a complete census of factories. Import value and source-country shares describe a shared customs category, not a separate chemical measurement.

Where It Comes From

Customs basis: HS 290539 · basket

These shares come from HS customs code 290539, which covers 48 tracked chemicals in total. They estimate the category's origin mix, not this chemical specifically.

Source Countries
DE 18%GermanyKR 16%South KoreaBR 11%BrazilTW 8%TaiwanMX 7%Mexico
19 FDA-registered drug labelers
Accord Healthcare, Inc
AMERICAN PACIFIC CORPORATION
Amneal Pharmaceuticals LLC
Apicore Pharmaceuticals Private Limited
Armas Pharmaceuticals Inc.
Bamboo US Bidco LCC
Emcure Pharmaceuticals Limited
Eugia US LLC
Excella GmbH & Co KG
Farmabios S.p.A.
Hospira, Inc.
Meitheal Pharmaceuticals Inc.
Mylan Institutional LLC
Otsuka America Pharmaceutical, Inc.
Pharmascience Inc.
PPL Pharma Solutions Riverview LLC
Sagent Pharmaceuticals
SHILPA PHARMA LIFESCIENCES LIMITED
Waylis Therapeutics LLC

Why It Matters

Sectors
Health
Downstream Uses

Appears in 3 drug and cosmetic product listings (FDA).

  • •Busulfex
  • •Busulfan
  • •Myleran
FDA Shortage Status
No Shortage
Shortage History
  • to be discontinued

    Busulfan Injection

    Shortage listed since October 24, 2025

See all current drug shortages

Vendor Pricing

$0.48/gCombi-Blocks, Inc.
CountryUnited States
Pack$240.00 / 500 g
Purity98%
Vendors24 available

Prices reflect listed pack sizes. Small research packs run far above bulk rates.

23 more vendors
VendorCountry$/gPackPurity
A2B Chem LLCUnited States$0.52500 g98%
AA BLOCKSUnited States$0.55500 g95%
AK Scientific SpecializedUnited States$0.61100 g95%
Aaron Chemicals LLCHong Kong$0.67500 g98%
Angene ChemicalChina → Hong Kong$0.77500 g98%
AK Scientific, Inc.United States$0.82100 g98%
Cayman EuropeEstonia$2.54250 g98%
Angene International LimitedUnited States$2.8025 g95%
Sigma-Aldrich (Rush Stock)Germany$3.4225 g—
Sigma-AldrichGermany$3.4225 g—
Fulfilled by MolportLatvia$5.001 g98%
MedChemExpress MCESweden$11.5225 g99.9%
Apexbio Technology LLCUnited States$22.005 g98%
AstaTech, IncUnited States$40.001 g95%
MolnovaChina$56.001 g99%
TargetMol ChemicalsChina → United States$62.001 g99.89%
TargetMol Chemicals USUnited States$90.00500 mg99.89%
MedKoo Biosciences, IncUnited States$90.005 g98%
Labotest KGGermany$453.001000 mg90%
AngeneChina → Hong Kong$4266.6730 mg98%
Key Organics Ltd.United Kingdom$6900.0010 mg97%
TimTec, LLC (back-ordered)United States$32000.0015 mg94%
TimTec, LLCUnited States$90000.002 mg90%

Chemical Identity

CAS55-98-1
PubChem CID2478
DTXSIDDTXSID3020910
FormulaC6H14O6S2
Mol. Weight246.3 g/mol
SMILESCS(=O)(=O)OCCCCOS(=O)(=O)C

Data Sources

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Brief citations

Busulfan (CAS 55-98-1) https://chemicalindependence.com/chemical/55-98-1/ PubChem: 2478. Retrieved 2026-04-07. https://pubchem.ncbi.nlm.nih.gov/compound/2478 FDA National Drug Code directory: CAS 55-98-1. Retrieved 2026-04-25. https://open.fda.gov/data/ndc/ FDA Drug Shortages: CAS 55-98-1. Retrieved 2026-10-04. https://www.accessdata.fda.gov/scripts/drugshortages/ US Census international trade: HS 290539 for CAS 55-98-1. Reporting year: 2024. https://usatrade.census.gov/