Cyproterone acetate

Drug ingredient

CAS 427-51-0

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

US productionNot reported

Import value, 2024$154M

Top sourceItaly 60%

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 293729 · basket

These shares come from HS customs code 293729, which covers 57 tracked chemicals in total. They estimate the category's origin mix, not this chemical specifically.

Source Countries

Country of origin for US imports, from Census customs data (2024).

IT 60%ItalyES 14%SpainCN 11%ChinaDE 6%GermanyAT 2%Austria

Netherlands
Australia
Malaysia
Portugal
United Kingdom
Japan
Malta
Canada
Israel
Singapore
New Zealand
Poland
Ukraine
Belgium
Sweden

1 FDA-registered drug labeler

Farmabios S.p.A.

Why It Matters

Sectors

Health

Downstream UsesNot recorded

FDA Shortage Status

Whether any manufacturer currently reports this drug as in shortage on the FDA Drug Shortages database. "Active Shortage" means at least one presentation has status "current."

No FDA shortage records

Vendor Pricing

$13.00/gAaron Chemicals LLC

CountryHong Kong

Pack$65.00 / 5 g

Purity98%

Vendors22 available

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

21 more vendors

Vendor	Country	$/g	Pack	Purity
Angene Chemical	China → Hong Kong	$14.20	5 g	98%
A2B Chem LLC	United States	$34.12	25 g	97%
AA BLOCKS	United States	$44.76	25 g	97%
AK Scientific, Inc.	United States	$94.00	1 g	97%
Angene International Limited	United States	$180.00	1 g	97%
TargetMol Chemicals	China → United States	$216.00	250 mg	99.83%
Apexbio Technology LLC	United States	$264.00	250 mg	99.88%
Molnova	China	$300.00	100 mg	99%
MedChemExpress MCE	Sweden	$300.08	500 mg	99.9%
TargetMol Chemicals EU	Austria	$330.00	100 mg	99.83%
Labotest KG	Germany	$453.00	1000 mg	90%
Cayman Europe	Estonia	$537.88	1 g	98%
AK Scientific Specialized	United States	$680.00	100 mg	98%
CliniSciences GmbH	Switzerland	$727.56	250 mg	99%
Axon Medchem	Netherlands	$1440.00	50 mg	100%
MedKoo Biosciences, Inc	United States	$1500.00	500 mg	98%
Otava, Ltd. (2 weeks)	Ukraine	$2724.00	50 mg	90%
Sigma-Aldrich (Rush Stock)	Germany	$2965.12	250 mg	98%
Sigma-Aldrich	Germany	$2965.12	250 mg	98%
Angene	China → Hong Kong	$4266.67	30 mg	98%
Key Organics Ltd.	United Kingdom	$6900.00	10 mg	97%

Chemical Identity

CAS427-51-0

PubChem CID9880

DTXSIDDTXSID5020366

FormulaC24H29ClO4

Mol. Weight416.9 g/mol

SMILESCC(=O)C1(CCC2C1(CCC3C2C=C(C4=CC(=O)C5CC5C34C)Cl)C)OC(=O)C

Data Sources

PubChem · compound 9880Retrieved 2026-04-07
FDA National Drug Code directoryRetrieved 2026-04-25
FDA National Drug Code directoryRetrieved 2026-04-07
US Census international tradeReporting year: 2024 · Retrieved 2026-10-04

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Brief citations

Cyproterone acetate (CAS 427-51-0) https://chemicalindependence.com/chemical/427-51-0/ PubChem: 9880. Retrieved 2026-04-07. https://pubchem.ncbi.nlm.nih.gov/compound/9880 FDA National Drug Code directory: CAS 427-51-0. Retrieved 2026-04-25. https://open.fda.gov/data/ndc/ FDA National Drug Code directory: bulk match. Retrieved 2026-04-07. https://open.fda.gov/data/ndc/ US Census international trade: HS 293729 for CAS 427-51-0. Reporting year: 2024. https://usatrade.census.gov/