Anastrozole

Drug ingredient

CAS 120511-73-1

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

US productionNot reported

Import value, 2024$1.4B

Top sourceIreland 33%

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 293399 · basket

These shares come from HS customs code 293399, which covers 518 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).

IE 33%IrelandCN 26%ChinaIN 11%IndiaDE 9%GermanyIT 4%Italy

Taiwan
Poland
Canada
Ivory Coast
Greece
Hungary
Indonesia
Latvia
Belgium
Slovakia
Czech Republic
Austria
Netherlands
Finland
Denmark
Croatia
Australia
South Africa
Sweden
Hong Kong
Malta
Singapore
Lithuania
Malaysia
Oman
Serbia

42 FDA-registered drug labelers

A-S Medication Solutions

Accord Healthcare Inc.

American Health Packaging

ANI Pharmaceuticals, Inc.

Asclemed USA, Inc.

AstraZeneca Pharmaceuticals LP

Aurobindo Pharma Limited

Avet Pharmaceuticals Inc

AvKARE

AvPAK

AX Pharmaceutical Corp

BluePoint Laboratories

Breckenridge Pharmaceutical, Inc.

Bryant Ranch Prepack

Catalent Micron Technologies, Inc.

Chartwell RX, LLC

DARMERICA, LLC

Direct_Rx

Dr.Reddy's Laboratories Limited

Excella GmbH & Co. KG

Hetero Labs Limited

LETCO MEDICAL, LLC

MEDISCA Inc.

Natco Pharma Limited

NuCare Pharmaceuticals, Inc.

PD-Rx Pharmaceuticals, Inc.

Pharma Source Direct, Inc.

Professional Compounding Centers of America

Professional Compounding Centers of America dba PCCA

Proficient Rx LP

Qingdao Biopeptek Co., Ltd.

ScinoPharm Taiwan Ltd.

Sichuan Xieli Pharmaceutical Co., Ltd.

SUN PHARMACEUTICAL INDUSTRIES, INC.

Synthimed Labs Private Limited

Teva Pharmaceuticals USA, Inc.

Upsher-Smith Laboratories, LLC

Yiling Pharmaceutical, Inc.

Zhejiang Haizhou Pharmaceutical Co., Ltd.

Zhejiang Hisun Pharmaceutical Co., Ltd.

Zydus Lifesciences Limited

Zydus Pharmaceuticals USA Inc.

Why It Matters

Sectors

Health

Downstream Uses

Appears in 2 drug and cosmetic product listings (FDA).

•Anastrozole
•Arimidex

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

Chemical Identity

CAS120511-73-1

PubChem CID2187

DTXSIDDTXSID9022607

FormulaC17H19N5

Mol. Weight293.4 g/mol

SMILESCC(C)(C#N)C1=CC(=CC(=C1)CN2C=NC=N2)C(C)(C)C#N

Data Sources

PubChem · compound 2187Retrieved 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

Anastrozole (CAS 120511-73-1) https://chemicalindependence.com/chemical/120511-73-1/ PubChem: 2187. Retrieved 2026-04-07. https://pubchem.ncbi.nlm.nih.gov/compound/2187 FDA National Drug Code directory: CAS 120511-73-1. 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 293399 for CAS 120511-73-1. Reporting year: 2024. https://usatrade.census.gov/