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Trimethoprim 738-70-5


Product Name: Trimethoprim
CAS: 738-70-5
MF: C14H18N4O3
MW: 290.32
EINECS: 212-006-2
Melting point: 199-203 °C
Boiling point: 432.41°C (rough estimate)
Density: 1.1648 (rough estimate)
Refractive index: 1.6000 (estimate)
Storage temp: 2-8°C
Solubility DMSO: soluble
Pka: 6.6(at 25℃)
Form: white powder
Color: colorless or white
Water Solubility: <0.1 g/100 mL at 24 ºC
Merck: 14,9709
BRN: 625127


Product Name Trimethoprim
Appearance White powder
Purity 98.5%-101.0%(BP);99.0-101.0%(CP) 
Loss on drying ≤1.0%(BP);≤0.5%(USP、CP)
Related substances  ≤0.2%


Antibacterial drugs, the scope of antibacterial is similar to sulfa drugs, combined with sulfa drugs or antibiotics, can greatly improve the efficacy of drugs.
Used in the production of compound trimethoprim, compound cephalexin trimethoprim, Zengxiaoliansu tablets, compound artemisinin tablets


Store in cold and dry conditions, in a ventilated area away from heating and incompatible materials, sealed and stored


Stable. Incompatible with strong oxidizing agents, acids.

Description of necessary first aid measures

If inhaled, move the patient to fresh air. If you stop breathing, give artificial respiration.
skin contact
Rinse with soap and plenty of water.
eye contact
Flush eyes with water as a preventive measure.
Never feed anything from the mouth to an unconscious person. Rinse your mouth with water.