
Pharmaceutical-grade Sulfadimidine (sulfamethazine, CAS 57-68-1), 99.0–101.0%, supplied wholesale by Zyntex to licensed producers. Sulfonamide API for veterinary powders, water solutions, boluses and trimethoprim combinations. CoA and SDS.
Sulfadimidine (C12H14N4O2S), known as sulfamethazine in the United States, is a white or yellowish-white crystalline powder that is very slightly soluble in water. For water-soluble products, producers convert it into the sodium salt.
Veterinary producers use it in oral powders, drinking water solutions, boluses and injectables for cattle, pigs, sheep and poultry, often combined with Trimethoprim. It is also used against coccidiosis in poultry, sometimes alongside Amprolium Hydrochloride. Maximum residue limits in food from treated animals must be respected, which is why withdrawal periods are part of every product authorization.
It belongs to the sulfonamide family together with Sulfadiazine, Sulfaguanidine and Sulfanilamide. Zyntex supplies it only to companies licensed for pharmaceutical or veterinary use.
Main application areas:
🐄 Livestock Products
API for powders, boluses and injectables for cattle, pigs and sheep.
🐔 Poultry
API for drinking water medication.
🔗 Combination Products
Combined with trimethoprim.
🔬 Generic Development
Development and reference material.
| Parameter | Standard Value |
|---|---|
| Product Name | Sulfadimidine (Sulfamethazine) |
| CAS Number | 57-68-1 |
| Molecular Formula / Weight | C12H14N4O2S / 278.33 g/mol |
| Assay / Purity (HPLC) | 99.0% to 101.0% (Dry Basis) |
| Appearance | White or yellowish-white crystalline powder |
| Melting Point | 197°C to 200°C |
| Solubility | Very slightly soluble in water; soluble in acetone; slightly soluble in ethanol |
| Documents | CoA and SDS with every lot |
⚠️ Safety & Handling: Pharmacologically active substance that may cause allergic reactions, especially in people sensitive to sulfonamides. Avoid inhalation of dust and contact with skin; wear gloves, eye protection and dust protection. Store in tightly closed, light-resistant containers. Always consult the Safety Data Sheet (SDS) for full classification and handling instructions.
Is it the same as sulfamethazine?
Yes. Sulfadimidine is the international name and sulfamethazine the US name for the same API.
Do you supply the sodium salt?
Sulfadimidine sodium for water-soluble products can be quoted on request.
How can I get a price and documents?
Prices depend on quantity, packaging and destination. Contact us with your required volume to receive a quotation together with the CoA and SDS.