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Top Quality Medical Grade 99% Purity Trimethoprim CAS 738-70-5
Trimethoprim is a bacteriostatic antibiotic used mainly in the prophylaxis and treatment of urinary tract infections.Target: DHFRTrimethoprim (TMP), an inhibitor of dihydrofolate reductase, decreases the level of tetrahydrofolate supplying one-carbon units for biosynthesis of nucleotides, proteins, and panthotenate. TMP caused induction of DnaK, DnaJ, GroEL, ClpB, and IbpA/B Hsps. Among these Hsps, IbpA/B were most efficiently induced by TMP and coaggregated with the insoluble proteins [1]. Trimethoprim binds to dihydrofolate reductase and inhibits the reduction of dihydrofolic acid (DHF) to tetrahydrofolic acid (THF). THF is an essential precursor in the thymidine synthesis pathway and interference with this pathway inhibits bacterial DNA synthesis. Trimethoprim's affinity for bacterial dihydrofolate reductase is several thousand times greater than its affinity for human dihydrofolate reductase. Sulfamethoxazole inhibits dihydropteroate synthetase, an enzyme involved further upstream in the same pathway. Trimethoprim and sulfamethoxazole are commonly used in combination due to their synergistic effects. This drug combination also reduces the development of resistance that is seen when either drug is used alone.
English name: trimethoprim
English alias: trimethoprim crystalline;5 - (three, four, five - trimethoxybenzyl) pyrimidine - 2, 4 - diyldiamine;Antibiotic synergist
CAS number: 738-70-5 [1]
EINECS no. : 212-006-2
Molecular formula: C14H18N4O3
Molecular weight: 290.32
| Density | 1.3±0.1 g/cm3 |
| Boiling Point | 405.2±55.0 °C at 760 mmHg |
| Melting Point | 199-203 °C |
| Molecular Formula | C14H18N4O3 |
| Molecular Weight | 290.318 |
| Flash Point | 198.8±31.5 °C |
| Exact Mass | 290.137878 |
| PSA | 105.51000 |
| LogP | 0.38 |
| Vapour Pressure | 0.0±0.9 mmHg at 25°C |
| Index of Refraction | 1.600 |
| Storage condition | 2-8°C |
| Stability | Stable. Incompatible with strong oxidizing agents, acids. |
Xi'an Biohorlden Industry&Trade Co.,Ltd is a national key high-tech enterprise,which mainly specializes in the R&D, operation and production of pharmaceuticals,and intermediates.Our company is situated in E&T development zone,xi'an city shaanxi,it is easy of access. Our company has independent R&D center,raw material synthesis workshop, has advanced quality instruments and equipmentm,several product patents there are 15 experts in our research team.We insist in innovation and produce high quality products.
1.Are you a manufacturer or trade company?
We are a professional manufacturer.
2.What's your payment terms?
Standard terms: T/T in advance and Western Union.
Also L/C at sight is acceptable for large amount.
3.What's your shipping time?
We have a large stock, which means we can deliver the goods to you immediately.
4.How do you ensure the quality of your products?
Strict QC with 6 steps testing from raw material purchase to finished product.
5.How do you ship the order normally?
For large qty order,ship the goods by sea.
For small qty order, by air or express. We supply optional express for you, including DHL,FEDEX,UPS,TXT,EMS,and so on.
6.What's your loading port?
Usually Shanghai, Qingdao, Tianjin, Guangzhou.
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