Trimethoprim

Trimethoprim
Synergistic antibacterial drugs alone for respiratory tract infections, urinary tract infections
Trimethoprim
Synergistic antibacterial drugs alone for respiratory tract infections, urinary tract infections, gastrointestinal infections and other diseases

The TNN development limited(ISO 9001: 2008), are strong in the field of Pharmaceuticals,
food additives, and fine chemicals for more than 10 years export history.

Appearance
White or yellowish -white powder
white powder
solubility
very slightly soluble in water, slightly solubie in alcohol
meets the requirements
Melting point
199-203 deg.c
200.5 - 201 deg.c
Specific absorbance
max.287 nm: 240-250
245
IR-spectrum
complies with reference spectrum
meets the requirements
Chemical reaction
green fluorescence at 365nm
meets the requirements
Appearance of solution
not more intensely colored than reference solution BY7
less intensely colored than reference solution BY7
Related substances :


HPLC method A :


Impurity F
0.1% max
0.06%
Any impurity single
0.1% max
0.1%
Total impurities
0.2% max
0.2%
HPLC method B :


Any impurity single
0.1% max
0.1%
Total impurities
0.1% max
0.1%
Heavy metals
20ppm max
20ppm
Residual methanol
3000ppm max
below detection limit
Residual DMSO
5000ppm max
below detection limit
Residual acetic acid
5000ppm max
below detection limit
GC impurity K (aniline)
5ppm max
below detection limit
Loss on drying
1.0% max
0.2%
Sulphated ash
0.1% max
0.02%
Assay
98.5-101%
99.7%
Storage:
kept in a light-proof,well-colsed,dry and cool place.

Service we can provide:
1. Mixed container, we can mix different items in one container.
2. Quality control, before shipment, free sample for test. after shipment, keep sample for 3 years
3. Prompt shipment with professional documents
4. Packing as your request, with photo before shipment

Our Advantages:
Full experience of large numbers containers loading in Chinese sea port
fast shipment by reputed shipping line
packing with pallet as buyer's special request
best service after shipment with e mail
cargoes together with container sales seervice available
full experience for Canada & Japan export
cargoes photo before and after loading into container
raw materials from chinese origin