Carbinoxamine maleate

Drug ingredient

CAS 3505-38-2

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 listed as active in US commerce, but no company reported it to EPA’s survey for 2019 or 2023. Sites may have made or imported less than the threshold amount, or none.

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

13 FDA-registered drug labelers

Aytu Therapeutics, LLC

Biocomp Pharma, Inc.

BluCrest Pharmaceuticals, LLC

Carwin Pharmaceutical Associates, LLC

Genus Lifesciences Inc.

IPG Pharmaceuticals, inc.

Kongo Chemical Co., Ltd.

Leading Pharma, LLC

MSN Pharmachem Private Limited

Neos Therapeutics, LP

R.L.Fine Chem Private Limited

Symed Labs Limited

TRIPOINT THERAPEUTICS, LLC

Why It Matters

Sectors

Health

Downstream Uses

Appears in 5 drug and cosmetic product listings (FDA).

•RyVent
•Karbinal ER
•Carbinoxamine Maleate Extended-Release Oral Suspension
•Carbinoxamine Maleate
•Carbzah

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

$3.84/gAA BLOCKS

CountryUnited States

Pack$96.00 / 25 g

Purity97%

Vendors3 available

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

2 more vendors

Vendor	Country	$/g	Pack	Purity
Aaron Chemicals LLC	Hong Kong	$4.12	100 g	99%
Fulfilled by Molport	Latvia	$50.00	100 mg	99%

Chemical Identity

CAS3505-38-2

PubChem CID5282409

DTXSIDDTXSID0047828

FormulaC20H23ClN2O5

Mol. Weight406.9 g/mol

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

Data Sources

PubChem · compound 5282409Retrieved 2026-04-07
EPA TSCA InventoryRetrieved 2026-04-24
FDA National Drug Code directoryRetrieved 2026-04-07
US Census international tradeReporting year: 2024 · Retrieved 2026-10-04

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Brief citations

Carbinoxamine maleate (CAS 3505-38-2) https://chemicalindependence.com/chemical/3505-38-2/ PubChem: 5282409. Retrieved 2026-04-07. https://pubchem.ncbi.nlm.nih.gov/compound/5282409 EPA TSCA Inventory: CAS 3505-38-2. Retrieved 2026-04-24. https://www.epa.gov/tsca-inventory 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 3505-38-2. Reporting year: 2024. https://usatrade.census.gov/