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mechlorethamine

Drug ingredient

CAS 51-75-2

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

Molecular structure of 51-75-2
US productionNot reported
Import value, 2024$148M
Top sourceChina 34%

This chemical is listed as active in US commerce, but no company reported it to EPA’s survey for 2019 or 2023. Sites may have made or imported less than the threshold amount, or none.

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 292119 · basket

These shares come from HS customs code 292119, which covers 136 tracked chemicals in total. They estimate the category's origin mix, not this chemical specifically.

Source Countries
CN 34%ChinaPH 22%PhilippinesDE 17%GermanyBE 7%BelgiumJP 4%Japan
1 FDA-registered drug labeler
Helsinn Therapeutics (U.S.), Inc.

Why It Matters

Sectors
Health
Downstream Uses

Appears in 1 drug and cosmetic product listings (FDA).

  • •Valchlor
FDA Shortage Status
No FDA shortage records

Chemical Identity

CAS51-75-2
PubChem CID4033
DTXSIDDTXSID2020975
FormulaC5H11Cl2N
Mol. Weight156.05 g/mol
SMILESCN(CCCl)CCCl

Data Sources

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Brief citations

mechlorethamine (CAS 51-75-2) https://chemicalindependence.com/chemical/51-75-2/ PubChem: 4033. Retrieved 2026-04-07. https://pubchem.ncbi.nlm.nih.gov/compound/4033 EPA TSCA Inventory: CAS 51-75-2. Retrieved 2026-04-24. https://www.epa.gov/tsca-inventory FDA National Drug Code directory: bulk match. Retrieved 2026-04-07. https://open.fda.gov/data/ndc/ US Census international trade: HS 292119 for CAS 51-75-2. Reporting year: 2024. https://usatrade.census.gov/