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Diethylstilbestrol

Drug ingredient

CAS 56-53-1

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

Molecular structure of 56-53-1
US productionNot reported
Import value, 2024$72M
Top sourceIndia 30%

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 290729 · basket

These shares come from HS customs code 290729, which covers 82 tracked chemicals in total. They estimate the category's origin mix, not this chemical specifically.

Source Countries
IN 30%IndiaDE 19%GermanyCN 16%ChinaJP 11%JapanIT 7%Italy
2 FDA-registered drug labelers
DARMERICA, LLC
Deseret Biologicals, Inc.

Why It Matters

Sectors
Health
Downstream Uses

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

  • •Household Detox
FDA Shortage Status
No FDA shortage records

Chemical Identity

CAS56-53-1
PubChem CID448537
DTXSIDDTXSID3020465
FormulaC18H20O2
Mol. Weight268.3 g/mol
SMILESCCC(=C(CC)C1=CC=C(C=C1)O)C2=CC=C(C=C2)O

Data Sources

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Brief citations

Diethylstilbestrol (CAS 56-53-1) https://chemicalindependence.com/chemical/56-53-1/ PubChem: 448537. Retrieved 2026-04-07. https://pubchem.ncbi.nlm.nih.gov/compound/448537 EPA TSCA Inventory: CAS 56-53-1. 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 290729 for CAS 56-53-1. Reporting year: 2024. https://usatrade.census.gov/