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Sulfasalazine

Drug ingredient

CAS 599-79-1

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

Molecular structure of 599-79-1
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
IE 63%IrelandSG 14%SingaporeIN 7%IndiaCN 7%ChinaCH 2%Switzerland
17 FDA-registered drug labelers
A-S Medication Solutions
Aphena Pharma Solutions - Tennessee, LLC
Bryant Ranch Prepack
Cambrex Charles City, Inc
Chartwell RX, LLC.
Cohance Lifesciences Limited
Haupt Pharma Wuelfing GmbH.
LETCO MEDICAL, LLC
Medisca Inc.
Mylan Pharmaceuticals Inc.
Pfizer Laboratories Div Pfizer Inc
REMEDYREPACK INC.
Rising Pharma Holdings, Inc.
Spectrum Laboratory Products, Inc.
Sunrise Pharmaceutical, Inc.
Teva Pharmaceuticals USA, Inc.
VALENS MOLECULES PRIVATE LIMITED

Why It Matters

Sectors
Health
Downstream Uses

Appears in 3 drug and cosmetic product listings (FDA).

  • •Sulfasalazine
  • •Azulfidine
  • •Azulfidine EN-tabs
FDA Shortage Status
No FDA shortage records

Vendor Pricing

$1.20/gFluorochem UK
CountryUnited Kingdom
Pack$30.03 / 25 g
Purity95%
Vendors2 available

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

1 more vendor
VendorCountry$/gPackPurity
Labotest KGGermany$217.805000 mg90%

Chemical Identity

CAS599-79-1
PubChem CID5339
DTXSIDDTXSID0021256
FormulaC18H14N4O5S
Mol. Weight398.4 g/mol
SMILESC1=CC=NC(=C1)NS(=O)(=O)C2=CC=C(C=C2)N=NC3=CC(=C(C=C3)O)C(=O)O

Data Sources

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Brief citations

Sulfasalazine (CAS 599-79-1) https://chemicalindependence.com/chemical/599-79-1/ PubChem: 5339. Retrieved 2026-04-07. https://pubchem.ncbi.nlm.nih.gov/compound/5339 FDA National Drug Code directory: CAS 599-79-1. 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 599-79-1. Reporting year: 2024. https://usatrade.census.gov/