Specification 

Appearance                 White or yellowish-white powder

Melting point               199-203℃
Specific absorbance     Max 287nm
Any single impurity      ≤0.1%
Total impurities           ≤0.2%
Heavy metals              ≤20ppm
Residual methanol       ≤3000ppm
Residual DMSO            ≤5000ppm
Loss on drying             ≤1.0%
Sulphated ash             ≤0.1%
Assay                         98.5%~101.0%

Application 

An oral broad-spectrum antibacterial drugs, trimethoprim is antibacterial and it is resemble sulfonamide. The antibacterial function will be better along with sulfonamide. It is used to cure breath-path infection, senile chronic bronchitis, bacillary dysentery, urinary tract infection, nephritis, enteritis typhoid, gonorrhea and some specific inflammation.

About Us:

Hebei Zhanyao Biotechnology Co. LTD is established in 2010, which is a fast growing intermediate company located in 

Shijiazhuang, Hebei Province. After ten years of development, Hebei Zhanyao has become a diversified company, not only 

involved in Pharmaceutical Intermediates, but also in the field of agricultural products. Also Have factory for 

plastic&rubbler granule, So far, Hebei Zhanyao has operations in 35 countries, and most of its big customers are from Europe 

and the United States. The quality of hebei Zhanyao products is always the best among Chinese suppliers, with some products of 

99.9+ purity. This is an important reason for customers to choose

High quality with competitive price.

1. Standard bp/usp/ep/enterprise standard.

2. All purity>99%.

3. We are manufacturer and can provide high quality products with factory price.

Fast and safe delivery.

1. Parcel can be sent out in 24 hours after payment tracking number available.

2. Secure and discreet  shipment verious transportation methods for your choice.

3. Customs pass rate >99%.

4. We have our own agent/remailer/distributor who can help us ship our products very fast and safe, and we have stock in there 

for transferring.

We have clients throughout the world.

1. Professional service and rich experience make customers feel at ease, adequate stock and fast delivery meet their desire.

2. Market feedback and goods feedback will be appreciated , meeting customers' requirement is our responsibility.

3. High quality, competitive price, fast delivery, first-class service gain the trust and praise from the customers.