Iothalamic acid

Drug ingredient

CAS 2276-90-6

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

US productionNot reported

Import value, 2024$872M

Top sourceSwitzerland 44%

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 292429 · basket

These shares come from HS customs code 292429, which covers 203 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).

CH 44%SwitzerlandCN 19%ChinaIN 12%IndiaJP 9%JapanIE 6%Ireland

Taiwan
United Kingdom
El Salvador
Colombia
Ukraine
Brazil
Guatemala
Belgium
Netherlands
Turkey
Sweden
Greece
Canada
Israel
New Zealand
Latvia
Lithuania
Finland
Slovakia
Australia
Hong Kong
Czech Republic
Armenia
Poland

1 FDA-registered drug labeler

Justesa Imagen, S.A.U.

Why It Matters

Sectors

Health

Downstream UsesNot recorded

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

$1465.00/gA2B Chem LLC (1 week)

CountryUnited States

Pack$293.00 / 200 mg

PurityNot recorded

Vendors5 available

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

4 more vendors

Vendor	Country	$/g	Pack	Purity
AA BLOCKS (1 week)	United States	$1540.00	200 mg	—
Aaron Chemicals LLC	Hong Kong	$46200.00	5 mg	99.28%
MedChemExpress MCE	Sweden	$151976.00	10 mg	99.73%
Angene International Limited	United States	$195000.00	10 mg	98%

Chemical Identity

CAS2276-90-6

PubChem CID3737

DTXSIDDTXSID5023164

FormulaC11H9I3N2O4

Mol. Weight613.91 g/mol

SMILESCC(=O)NC1=C(C(=C(C(=C1I)C(=O)O)I)C(=O)NC)I

Data Sources

PubChem · compound 3737Retrieved 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

Iothalamic acid (CAS 2276-90-6) https://chemicalindependence.com/chemical/2276-90-6/ PubChem: 3737. Retrieved 2026-04-07. https://pubchem.ncbi.nlm.nih.gov/compound/3737 FDA National Drug Code directory: CAS 2276-90-6. 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 292429 for CAS 2276-90-6. Reporting year: 2024. https://usatrade.census.gov/