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Sulfamethoxazole

Drug ingredient

CAS 723-46-6

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

Molecular structure of 723-46-6
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
48 FDA-registered drug labelers
A-S Medication Solutions
Advanced Rx Pharmacy of Tennessee, LLC
American Health Packaging
Amneal Pharmaceuticals LLC
Amneal Pharmaceuticals of New York LLC
ANI Pharmaceuticals, Inc.
ASCLEMED USA INC.
ATLANTIC BIOLOGICALS CORP.
Aurobindo Pharma Limited
AvKARE
AvPAK
Bryant Ranch Prepack
Cardinal Health 107, LLC
Chartwell Governmental & Specialty RX, LLC.
Chartwell RX, LLC
Cronus Pharma LLC
Denton Pharma, Inc. DBA Northwind Pharmaceuticals
Direct_Rx
Golden State Medical Supply, Inc.
Kesin Pharma
LETCO MEDICAL, LLC
Major Pharmaceuticals
MEDISCA Inc.
NCS HealthCare of KY, LLC dba Vangard Labs
Northwind Health Company, LLC
NuCare Pharmaceuticals, Inc.
PAI Holdings, LLC dba PAI Pharma
PD-Rx Pharmaceuticals, Inc.
Pharmasource Meds, LLC
PharmPak, Inc.
Prasco Laboratories
Preferred Pharmaceuticals Inc.
Professional Compounding Centers of America
Proficient Rx LP
QPharma, Inc.
Quality Care Products LLC
RedPharm Drug, Inc.
REMEDYREPACK INC.
Rising Pharma Holdings, Inc.
Shouguang Fukang Pharmaceutical Co., Ltd.
Somerset Therapeutics, LLC
Sportpharm LLC
ST. MARY'S MEDICAL PARK PHARMACY
Sun Pharmaceutical Industries, Inc
Teva Parenteral Medicines, Inc.
VERITYRX, LLC
Virchow Labs
Vista Pharmaceuticals, Inc.

Why It Matters

Sectors
Health
Downstream Uses

Appears in 7 drug and cosmetic product listings (FDA).

  • •Sulfamethoxazole and Trimethoprim
  • •Sulfatrim
  • •Sulfamethoxazole and Trimethoprim DS
  • •Bactrim DS
  • •Sulfamethox-TMP DS
  • •Bactrim
  • •Sulfameth/Trimeth-DS
FDA Shortage Status
No FDA shortage records

Vendor Pricing

$0.06/gAaron Chemicals LLC
CountryHong Kong
Pack$61.00 / 1 kg
Purity99%
Vendors39 available

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

38 more vendors
VendorCountry$/gPackPurity
Angene ChemicalChina → Hong Kong$0.07500 g95%
AA BLOCKSUnited States$0.081 kg97%
A2B Chem LLCUnited States$0.081 kg97%
Apollo Scientific USUnited Kingdom$0.112.5 kg—
Manchester OrganicsUnited Kingdom$0.131 kg97%
BLD Pharmatech Ltd.China$0.141 kg99%
BLD Pharmatech GmbHGermany$0.14500 g99%
BLD Pharmatech Co., LimitedUnited States$0.151 kg99%
Ambeed, Inc.United States$0.151 kg99%
Combi-Blocks, Inc.United States$0.251 kg98%
Angene International LimitedUnited States$0.31100 g97%
AK Scientific SpecializedUnited States$0.69100 g95%
Fulfilled by MolportLatvia$0.805 g—
AK Scientific, Inc.United States$0.94100 g98%
Cayman EuropeEstonia$1.92100 g98%
Sigma-Aldrich (Rush Stock)Germany$2.27100 g—
Sigma-AldrichGermany$2.27100 g—
MedKoo Biosciences, IncUnited States$2.451 kg98%
AstaTech (2 weeks)United States$3.6825 g95%
MedChemExpress MCESweden$16.2625 g99.91%
InterbioscreenHong Kong$25.5010 g95%
ChemDiv, Inc.United States$60.001 g90%
Princeton BioMolecular Research (BB)United States$92.005 g95%
Apexbio Technology LLCUnited States$146.00500 mg99.68%
MolnovaChina$162.00500 mg99%
TargetMol ChemicalsChina → United States$180.00500 mg99.92%
Vitas M Chemical LimitedHong Kong$360.001 g90%
HTS Biochemie InnovationenGermany$400.001 g95%
Labotest KGGermany$453.001000 mg90%
Maybridge, Ltd.United Kingdom$2414.30100 mg90%
EximedUkraine$2680.0050 mg90%
Otava, Ltd. (2 weeks)Ukraine$2724.0050 mg90%
Key Organics Ltd.United Kingdom$2740.0050 mg90%
Princeton BioMolecular Research (SC)United States$2900.00100 mg90%
Life Chemicals Inc.Ukraine → Canada$3100.00100 mg90%
AngeneChina → Hong Kong$4266.6730 mg99%
TimTec, LLCUnited States$9333.3330 mg90%
AsinexNetherlands$23232.0010 mg90%

Chemical Identity

CAS723-46-6
PubChem CID5329
DTXSIDDTXSID8026064
FormulaC10H11N3O3S
Mol. Weight253.28 g/mol
SMILESCC1=CC(=NO1)NS(=O)(=O)C2=CC=C(C=C2)N

Data Sources

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Brief citations

Sulfamethoxazole (CAS 723-46-6) https://chemicalindependence.com/chemical/723-46-6/ PubChem: 5329. Retrieved 2026-04-07. https://pubchem.ncbi.nlm.nih.gov/compound/5329 EPA TSCA Inventory: CAS 723-46-6. 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 723-46-6. Reporting year: 2024. https://usatrade.census.gov/