Sulfamethoxazole
Also known as: Sulphamethoxazole, Sinomin, Gantanol, 3-Sulfanilamido-5-methylisoxazole, 4-Amino-N-(5-methyl-3-isoxazolyl)benzenesulfonamide, N1-(5-methylisoxazol-3-yl)sulfanilamide
Sulfamethoxazole (CAS 723-46-6) is a compound in the Pharma Intermediates category listed in the Jingsj chemical database. It has the molecular formula C10H11N3O3S and a molecular weight of 253.28300 g/mol. Key properties include a melting point of 166 °C, a boiling point of 482.1±55.0 °C at 760 mmHg, a density of 1.5±0.1 g/cm3 and a flash point of 245.4±31.5 °C. It is classified under GHS with signal word Warning and hazard statements H315 — Causes skin irritation, H317 — May cause an allergic skin reaction and H319 — Causes serious eye irritation. No supplier offers are currently listed; request a quote. Record last updated Nov 4, 2026.
- CAS No.
- 723-46-6
- Jingsj CID
- J-42971-0
- Molecular Formula
- C10H11N3O3S
- Molecular Weight
- 253.28300 g/mol
- Category
- Pharma Intermediates
- Last updated
- 11/4/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | 166 °C |
|---|---|
| Boiling Point | 482.1±55.0 °C at 760 mmHg |
| Density | 1.5±0.1 g/cm3 |
| Flash Point | 245.4±31.5 °C |
| Exact Mass | 253.052109 |
| PSA | 106.60000 |
| LogP | 0.89 |
| Vapor Pressure | 0.0±1.2 mmHg at 25°C |
| Refractive Index | 1.641 |
| Stability | Stable, but light sensitive. Incompatible with strong oxidizing agents. |
GHS Safety & Compliance
- H315 — Causes skin irritation
- H317 — May cause an allergic skin reaction
- H319 — Causes serious eye irritation
- H335 — May cause respiratory irritation
Activity & Biological Data
| Additional Information | [1]. http://en.wikipedia.org/wiki/Sulfamethoxazole |
|---|
Customs & Trade Information
| HS Code | 2935003000 |
|---|---|
| Summary | HS:2935003000 4-amino-n-(5-methylisoxazol-3-yl)benzenesulfonamide VAT:17.0% Tax rebate rate:9.0% Supervision conditions:none MFN tariff:6.5% General tariff:35.0% |
Frequently Asked Questions
What is the CAS number of Sulfamethoxazole?
The CAS number of Sulfamethoxazole is 723-46-6.
What are the molecular formula and molecular weight of Sulfamethoxazole?
Sulfamethoxazole has molecular formula C10H11N3O3S and molecular weight 253.28300 g/mol.
Is Sulfamethoxazole hazardous?
Sulfamethoxazole has GHS signal word Warning and hazard statements H315 — Causes skin irritation; H317 — May cause an allergic skin reaction; H319 — Causes serious eye irritation.
What are the upstream and downstream products of Sulfamethoxazole?
For Sulfamethoxazole, Upstream Products: N4-Acetylsulfamethoxazole, 4-Nitrobenzenesulfonyl chloride, N-Acetylsulfanilyl chloride; Downstream Products: N4-Acetylsulfamethoxazole.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "Sulfamethoxazole (CAS 723-46-6)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-42971-0 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.