Clemastine fumarate

Drug ingredient

CAS 14976-57-9

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

7 FDA-registered drug labelers

AX Pharmaceutical Corp

Chartwell RX, LLC

Genus Lifesciences

IPG Pharmaceuticals, Inc.

NURAY CHEMICALS PRIVATE LIMITED

Sekisui Medical Co., Ltd.

STHREE CHEMICALS PRIVATE LIMITED

Why It Matters

Sectors

Health

Downstream Uses

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

•Clemsza
•Clemastine Fumarate

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

CAS14976-57-9

PubChem CID5281069

DTXSIDDTXSID6047785

FormulaC25H30ClNO5

Mol. Weight460 g/mol

SMILESCC(C1=CC=CC=C1)(C2=CC=C(C=C2)Cl)OCCC3CCCN3C.C(=CC(=O)O)C(=O)O

Data Sources

PubChem · compound 5281069Retrieved 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

Clemastine fumarate (CAS 14976-57-9) https://chemicalindependence.com/chemical/14976-57-9/ PubChem: 5281069. Retrieved 2026-04-07. https://pubchem.ncbi.nlm.nih.gov/compound/5281069 FDA National Drug Code directory: CAS 14976-57-9. 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 14976-57-9. Reporting year: 2024. https://usatrade.census.gov/