Nimesulide

Drug ingredient

CAS 51803-78-2

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

US productionNot reported

Import value, 2024$2.0B

Top sourceIreland 63%

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 293590 · basket

These shares come from HS customs code 293590, which covers 182 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 63%IrelandSG 14%SingaporeIN 7%IndiaCN 7%ChinaCH 2%Switzerland

Portugal
Spain
Italy
Austria
Israel
Hungary
Canada
South Korea
Netherlands
Finland
Poland
Indonesia
Ukraine
Mexico
South Africa
Croatia
Greece
Taiwan
Hong Kong

1 FDA-registered drug labeler

OLON S.P.A.

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

$1.04/gAaron Chemicals LLC

CountryHong Kong

Pack$26.00 / 25 g

Purity98%

Vendors24 available

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

23 more vendors

Vendor	Country	$/g	Pack	Purity
Angene Chemical	China → Hong Kong	$1.12	25 g	98%
A2B Chem LLC	United States	$1.51	100 g	98%
Combi-Blocks, Inc.	United States	$1.80	100 g	98%
AA BLOCKS	United States	$1.95	100 g	98%
Ambeed, Inc.	United States	$2.20	25 g	98%
AK Scientific Specialized	United States	$4.27	100 g	95%
AstaTech, Inc	United States	$5.80	25 g	95%
AK Scientific, Inc.	United States	$5.90	100 g	98%
Fulfilled by Molport	Latvia	$6.00	1 g	98%
Angene International Limited	United States	$11.72	25 g	98%
Cayman Europe	Estonia	$13.85	25 g	99%
Fluorochem UK	United Kingdom	$14.30	1 g	98%
Sigma-Aldrich (Rush Stock)	Germany	$20.15	25 g	—
Sigma-Aldrich	Germany	$20.15	25 g	—
MedKoo Biosciences, Inc	United States	$90.00	5 g	98%
Apexbio Technology LLC	United States	$172.00	500 mg	99.82%
Molnova	China	$270.00	200 mg	99%
MedChemExpress MCE	Sweden	$297.66	500 mg	99.89%
TargetMol Chemicals	China → United States	$300.00	200 mg	99.91%
Labotest KG	Germany	$453.00	1000 mg	90%
Otava, Ltd. (2 weeks)	Ukraine	$2724.00	50 mg	90%
Angene	China → Hong Kong	$4266.67	30 mg	98%
Key Organics Ltd.	United Kingdom	$6900.00	10 mg	97%

Chemical Identity

CAS51803-78-2

PubChem CID4495

DTXSIDDTXSID3037250

FormulaC13H12N2O5S

Mol. Weight308.31 g/mol

SMILESCS(=O)(=O)NC1=C(C=C(C=C1)[N+](=O)[O-])OC2=CC=CC=C2

Data Sources

PubChem · compound 4495Retrieved 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

Nimesulide (CAS 51803-78-2) https://chemicalindependence.com/chemical/51803-78-2/ PubChem: 4495. Retrieved 2026-04-07. https://pubchem.ncbi.nlm.nih.gov/compound/4495 FDA National Drug Code directory: CAS 51803-78-2. 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 293590 for CAS 51803-78-2. Reporting year: 2024. https://usatrade.census.gov/