- food
- industrial
- pharma
Sulfamethoxazole
CAS 723-46-6
Also registered as 2 other CAS numbers
144930-01-8 · 129378-89-8
Concern score
Not assessed — no hazard data yet.
Sulfamethoxazole in plain language
Also known as 4-Amino-N-(5-methyl-1,2-oxazol-3-yl)benzene-1-sulfonamide · 4-amino-N-(5-methyl-1,2-oxazol-3-yl)benzenesulfonamide · Smx · Sulphamethoxazole · 3-(p-Aminobenzenesulfonamido)-5-methylisoxazole · 3-Sulfanilamido-5-methylisoxazole
Show all 42 names
4-Amino-N-(5-methyl-3-isoxazolyl)benzenesulfonamide · 4-Amino-N-(5-methyl-3-isoxazolyl)benzensulfonamide · 4-amino-N-(5-methylisoxazol-3-yl)benzenesulfonamide · 5-Methyl-3-sulfanilamidoisoxazole · Azo-gantanol · Benzenesulfonamide, 4-amino-N-(5-methyl-3-isoxazolyl)- · Gamazole · Gantanol · Gantanol-DS · N(sup 1)-(5-METHYL-3-ISOXAZOLYL)SULFANILAMIDE · N1-(5-Methyl-3-isoxazolyl)sulfanilamide · Ro 4-2130 · Radonil · STX-608 · Sinomin · Sulfamethalazole · Sulfamethoxazol · Sulfamethoxizole · Sulfamethylisoxazole · Sulfametoxazol · Sulfisomezole · Urobak · sulfamethoxazolesome selective agars only · Azo gantanol component sulfamethoxazole · Bactrim component sulfamethoxazole · Bactrim ds component sulfamethoxazole · Bactrim pediatric component sulfamethoxazole · Cotrim component sulfamethoxazole · Cotrim d.s. component sulfamethoxazole · Co-trimethoxazole component sulfamethoxazole · Septra component sulfamethoxazole · Sulfamethoprim component sulfamethoxazole · Sulfatrim component sulfamethoxazole · Sulmeprim component sulfamethoxazole · Uroplus component sulfamethoxazole · Sulfamethoxazolum
We don't have a plain-language description for Sulfamethoxazole yet.
Recorded functional uses: Pharmaceutical
- We haven't assessed a concern score for this ingredient yet.
Regulation
No restrictions found. Sulfamethoxazole appears in these published regulatory listings.
- In marketed US drugs
- Found in consumer products
- Pharma
- Food
- Industrial
USEPAcommercial use observedEPA CPDat observed this chemical in 9 composition records across product categories including Laboratory supplies, Food and drug. EPA CPDat classifies this chemical for functional uses including Pharmaceutical.
- EPA CPDat observed this chemical in 9 composition records across product categories including Laboratory supplies, Food and drug. EPA CPDat classifies this chemical for functional uses including Pharmaceutical.Source →
USFDAmarketed drug occurrenceFDA NDC lists this ingredient in 100 active drug products and 105 total products.
- FDA NDC lists this ingredient in 100 active drug products and 105 total products.Source →
USFDAlisted in openFDA substanceopenFDA substance registry classifies this ingredient as chemical.
- openFDA substance registry classifies this ingredient as chemical.Source →
Expert safety opinions
No expert opinion on file for Sulfamethoxazole. These are the independent scientific bodies that assess ingredients like this one; we show an opinion only when a record we hold cites it.
JECFA
Joint FAO/WHO Expert Committee on Food Additives
No JECFA evaluation on file.
EFSA
European Food Safety Authority
No EFSA opinion on file.
Evidence & sources
No graded research studies for Sulfamethoxazole yet. This record is compiled from the published data sources below — registries and regulatory listings, not study findings.
Where this comes from
- Open →
EPA Chemical and Products Database
exposure · updated November 2007
- Open →
EPA DSSTox Identifiers
chemistry · updated 2025-12-29
- Open →
FDA National Drug Code Directory
regulatory · updated 2028-11-30
- Open →
FDA GSRS UNII
registry · updated 2026-02-26
- Open →
openFDA Substance
registry · updated 2026-05-24
- Open →
PubChem Live Enrichment
chemistry · updated 2026-05-17
Suitability
Context-specific fit derived from published classifications and the current ingredient evidence profile.
Food use
Nothing to weigh for this context yet.
We have no published hazard signal for this ingredient, so we cannot say how it behaves in this context — that is missing evidence, not a clean result.
Fragrance avoidance
Nothing to weigh for this context yet.
We have no published hazard signal for this ingredient, so we cannot say how it behaves in this context — that is missing evidence, not a clean result.
Where it has been recorded
How often FDA National Drug Code directory has listed Sulfamethoxazole in a product composition. These are source records, not Greenveil catalog products.
Source records
105
Typical roles
Pharmaceutical