Flag of the United StatesAmerican Chemical Independence

Sulfapyridine

Drug ingredient

CAS 144-83-2

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

Molecular structure of 144-83-2
US productionNot reported
Import value, 2024$2.0B
Top sourceIreland 63%

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 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
IE 63%IrelandSG 14%SingaporeIN 7%IndiaCN 7%ChinaCH 2%Switzerland
3 FDA-registered drug labelers
Archimica S.p.A.
Fagron Inc
VALENS MOLECULES PRIVATE LIMITED

Why It Matters

Sectors
Health
Downstream UsesNot recorded
FDA Shortage Status
No FDA shortage records

Vendor Pricing

$0.25/gAK Scientific, Inc.
CountryUnited States
Pack$250.00 / 1 kg
Purity99%
Vendors36 available

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

35 more vendors
VendorCountry$/gPackPurity
Combi-Blocks, Inc.United States$0.251 kg98%
ChemsceneUnited States$0.251 kg—
BLD Pharmatech GmbHGermany$0.261 kg98%
BLD Pharmatech Ltd.China$0.261 kg98%
A2B Chem LLCUnited States$0.271 kg98%
AA BLOCKSUnited States$0.281 kg98%
AstaTech, IncUnited States$0.32250 g95%
Aaron Chemicals LLCHong Kong$0.34500 g98%
Angene ChemicalChina → Hong Kong$0.37500 g98%
Apollo Scientific USUnited Kingdom$0.41100 g98%
Manchester OrganicsUnited Kingdom$0.45250 g95%
BLD Pharmatech Co., LimitedUnited States$0.50100 g98%
Ambeed, Inc.United States$0.50100 g98%
AK Scientific SpecializedUnited States$0.51100 g98%
Angene International LimitedUnited States$0.53500 g99%
Fluorochem EUGermany$2.185 g98%
Sigma-Aldrich (Rush Stock)Germany$3.21100 g99%
Sigma-AldrichGermany$3.21100 g99%
MedKoo Biosciences, IncUnited States$3.75200 g98%
Cayman EuropeEstonia$3.8650 g98%
MedChemExpress MCESweden$6.2910 g99.85%
Apexbio Technology LLCUnited States$15.205 g99.49%
ChemDiv, Inc.United States$36.005 g90%
MolnovaChina$45.001 g99%
SpecsNetherlands$181.265 g90%
Labotest KGGermany$217.805000 mg90%
Vitas M Chemical LimitedHong Kong$310.001 g90%
Otava, Ltd.Ukraine$2280.0050 mg95%
Otava, Ltd. (2 weeks)Ukraine$2724.0050 mg95%
Princeton BioMolecular Research (SC)United States$2900.00100 mg90%
AngeneChina → Hong Kong$4266.6730 mg98%
Key Organics Ltd.United Kingdom$6900.0010 mg97%
A2B Chem LLC (2 weeks)United States$26080.0050 mg—
AA BLOCKS (2 weeks)United States$27460.0050 mg—
TimTec, LLC (back-ordered)United States$32000.0015 mg94%

Chemical Identity

CAS144-83-2
PubChem CID5336
DTXSIDDTXSID3026067
FormulaC11H11N3O2S
Mol. Weight249.29 g/mol
SMILESC1=CC=NC(=C1)NS(=O)(=O)C2=CC=C(C=C2)N

Data Sources

← Back to Dashboard← Back to Health

Brief citations

Sulfapyridine (CAS 144-83-2) https://chemicalindependence.com/chemical/144-83-2/ PubChem: 5336. Retrieved 2026-04-07. https://pubchem.ncbi.nlm.nih.gov/compound/5336 EPA TSCA Inventory: CAS 144-83-2. 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 293590 for CAS 144-83-2. Reporting year: 2024. https://usatrade.census.gov/