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Linezolid

Drug ingredient

CAS 165800-03-3

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

Molecular structure of 165800-03-3
US productionNot reported
Import value, 2024$6.4B
Top sourceSingapore 36%

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 293499 · basket

These shares come from HS customs code 293499, which covers 575 tracked chemicals in total. They estimate the category's origin mix, not this chemical specifically.

Source Countries
SG 36%SingaporeIE 23%IrelandCN 11%ChinaCH 6%SwitzerlandIN 5%India
42 FDA-registered drug labelers
Alembic Pharmaceuticals Inc.
Alembic Pharmaceuticals Limited
Alivus Life Sciences Limited
American Health Packaging
Ascend Laboratories, LLC
AX Pharmaceutical Corp
Bryant Ranch Prepack
Camber Pharmaceuticals, Inc.
Caplin Steriles Limited
Chartwell RX, LLC
Chromo Laboratories India Private Limited
Coupler LLC
Dr. Reddy's Laboratories Limited
Eugia US LLC
Formosa Laboratories, Inc.
Fresenius Kabi USA, LLC
Hikma Pharmaceuticals USA Inc.
Hospira, Inc.
Hp Halden Pharma AS
Jubilant Biosys limited
Lupin Pharmaceuticals,Inc.
Macleods Pharmaceuticals Limited
Major Pharmaceuticals
Mylan Pharmaceuticals Inc.
Neuland Laboratories Limited
Optimus Drugs Private Limited
Pfizer Asia Manufacturing Pte Ltd
Pharmacia & Upjohn Company LLC
Pharmacia and Upjohn Company LLC
Piramal Critical Care Inc
Professional Compounding Centers of America dba PCCA
REMEDYREPACK INC.
Rising Pharma Holdings, Inc.
Sandoz Inc
Sportpharm, Inc. dba Sportpharm
Sun Pharmaceutical Industries, Inc.
Symed Labs Limited
Uquifa Spain
Viatris Pharmaceuticals LLC
Zhejiang Changhai Pharmaceuticals Co., Ltd.
ZHEJIANG LEPU PHARMACEUTICAL CO., LTD.
Zydus Lifesciences Limited

Why It Matters

Sectors
Health
Downstream Uses

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

  • •Linezolid
  • •Zyvox
FDA Shortage Status
No FDA shortage records

Chemical Identity

CAS165800-03-3
PubChem CID441401
DTXSIDDTXSID5046489
FormulaC16H20FN3O4
Mol. Weight337.35 g/mol
SMILESCC(=O)NCC1CN(C(=O)O1)C2=CC(=C(C=C2)N3CCOCC3)F

Data Sources

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Brief citations

Linezolid (CAS 165800-03-3) https://chemicalindependence.com/chemical/165800-03-3/ PubChem: 441401. Retrieved 2026-04-07. https://pubchem.ncbi.nlm.nih.gov/compound/441401 FDA National Drug Code directory: CAS 165800-03-3. 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 293499 for CAS 165800-03-3. Reporting year: 2024. https://usatrade.census.gov/