dexchlorpheniramine maleate

Drug ingredient

CAS 2438-32-6

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

US productionNot reported

Import value, 2024$1.3B

Top sourceChina 32%

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 293339 · basket

These shares come from HS customs code 293339, which covers 397 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).

CN 32%ChinaIN 15%IndiaDE 10%GermanyBE 9%BelgiumCH 8%Switzerland

Taiwan
Ukraine
Sweden
Argentina
Canada
Finland
Malta
Israel
Netherlands
Denmark
United Arab Emirates
Mexico
Brunei
Slovakia
Australia
South Africa
Poland
Latvia
Lithuania
Estonia
Slovenia
Czech Republic
Croatia
Hong Kong

9 FDA-registered drug labelers

BluCrest Pharmaceuticals LLC

CARWIN PHARMACEUTICAL ASSOCIATES, LLC

EDWARDS PHARMACEUTICALS, INC.

GM Pharmaceuticals, INC

Keshava Organics Pvt Ltd

Kongo Chemical Co., Ltd.

Spectrum Laboratory Products, Inc.

Supriya Lifescience Limited

Westminster Pharmaceuticals, LLC

Why It Matters

Sectors

Health

Downstream Uses

Appears in 6 drug and cosmetic product listings (FDA).

•Vanacof
•VanaCof 2
•Corphena
•Rymed
•WesTussin DM
•Ryclora

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

$0.21/gAaron Chemicals LLC

CountryHong Kong

Pack$107.00 / 500 g

Purity99%

Vendors4 available

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

3 more vendors

Vendor	Country	$/g	Pack	Purity
AA BLOCKS	United States	$0.35	500 g	99%
Vitas M Chemical Limited	Hong Kong	$225.00	1 g	90%
Princeton BioMolecular Research (SC)	United States	$2900.00	100 mg	90%

Chemical Identity

CAS2438-32-6

PubChem CID5281070

DTXSIDDTXSID001017216

FormulaC20H23ClN2O4

Mol. Weight390.9 g/mol

SMILESCN(C)CCC(C1=CC=C(C=C1)Cl)C2=CC=CC=N2.C(=CC(=O)O)C(=O)O

Data Sources

PubChem · compound 5281070Retrieved 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

dexchlorpheniramine maleate (CAS 2438-32-6) https://chemicalindependence.com/chemical/2438-32-6/ PubChem: 5281070. Retrieved 2026-04-07. https://pubchem.ncbi.nlm.nih.gov/compound/5281070 FDA National Drug Code directory: CAS 2438-32-6. 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 293339 for CAS 2438-32-6. Reporting year: 2024. https://usatrade.census.gov/