Product Overview
Sulfonamide is a broad class of antibacterial and antimicrobial APIs, widely used in the treatment of bacterial infections and as key intermediates in the synthesis of oral tablets, capsules, and injectable formulations.
As a trusted Sulfonamide API manufacturer in China, we supply pharmaceutical-grade Sulfonamide produced under strict GMP-compliant processes, ensuring consistent quality, regulatory compliance, and reliable global supply.
Our Sulfonamide API is trusted by generic drug manufacturers, contract manufacturers, and pharmaceutical distributors, offering stable, cost-effective, and compliant sourcing solutions for international markets.

Technical Specifications
| Item | Specification |
|---|---|
| Product Name | Sulfonamide |
| CAS Number | 63-74-1 |
| Molecular Formula | C₆H₈N₂O₂S |
| Molecular Weight | 172.2 g/mol |
| Appearance | White or off-white crystalline powder |
| Assay | ≥ 99.0% (HPLC) |
| Identification | Conforms to USP / EP / BP |
| Loss on Drying | ≤ 0.5% |
| Residual Solvents | Compliant with ICH Q3C |
| Heavy Metals | Meets pharmacopeial limits |
| Packaging | 1 kg / 5 kg / 25 kg fiber drum or aluminum foil bag |
| Storage | Store in a cool, dry place, protected from light |
Key Applications
- Antibacterial and antimicrobial drug formulations
- Oral tablets, capsules, and injectable preparations
- Pharmaceutical R&D and intermediate synthesis
- Veterinary medicine applications


