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| 订货编号 | 产品名称 | 规格 | 包装 | 价格 | 操作 |
|---|---|---|---|---|---|
| X495677-x | 利福霉素S | 咨询规格 | 咨询包装 | 咨询价格 |
化学性质
危险属性
质量标准
采购询价
1. 分子结构:利福霉素S的分子式为C43H67NO13,分子量为829.02。它是一种含有苯并呋喃环结构的大环内酯类抗生素。
2. 酸性环境:利福霉素S在酸性环境中稳定,但在碱性环境中容易分解。因此,它通常以盐酸盐的形式使用,以确保其稳定性和药效。
3. 光敏性:利福霉素S对光敏感,容易被紫外线照射而降解。因此,在使用和储存时应避免暴露在阳光下或强光照射下。
4. 溶解性:利福霉素S在水中溶解度较低,一般需要用有机溶剂进行溶解。它的溶解度随温度的升高而增加,但过高的温度也会导致其分解。
5. pH稳定性:利福霉素S在pH值为6-8的范围内最稳定,而在酸性或碱性环境下容易分解。因此,在使用时应尽量保持适宜的pH值范围。
6. 化学反应:利福霉素S可以与一些化学物质发生反应,如氧化剂、还原剂和某些金属离子等。这些反应可能会影响其药效和稳
| RTECS号 | KD1925000 |
|---|---|
| 海关编码 | 2941.90.1050 |
| 毒性 | LD50 in mice (mg/kg): 122 i.v.; 258 i.p.; 3000 orally (Sensi, 1964) |
危险运输编码:
危险品标志:
安全标识:
危险标识:
Gram-positive bacteria
Reactive oxygen species (ROS)
The inhibition of bacterial growth by Rifamycin SV is due to the production of active species of oxygen resulting from the oxidation-reduction cycle of Rifamycin SV in the cells. The aerobic oxidation of Rifamycin SV to Rifamycin S is induced by metal ions, such as Mn 2+ , Cu 2+ , and Co 2+ . The most effective metal ion is Mn 2+ .
Rat liver sub-mitochondrial particles also generated hydroxyl radical in the presence of NADH and Rifamycin S. NADH dehydrogenase (complex I) as the major component involved in the reduction of Rifamycin S. Compared to NADPH, NADH is almost as effective (Rifamycin S) in catalyzing the interactions of these antibiotics with rat liver microsomes. Rifamycin S is shown to be readily reduced to Rifamycin SV, the corresponding hydroquinone by Fe(II). Rifamycin S forms a detectable Fe(II)-(Rifamycin S)3 complex. The Fe:ATP induced lipid peroxidation is completely inhibited by Rifamycin S. Rifamycin S can interact with rat liver microsomes to undergo redox-cycling, with the subsequent production of hydroxyl radicals when iron complexes are present.
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