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    • 5. 发明专利
    • Preparation of stable crystal of salt of ceftizoxime
    • 盐酸稳定晶体的制备
    • JPS5726692A
    • 1982-02-12
    • JP10068080
    • 1980-07-22
    • Fujisawa Pharmaceut Co Ltd
    • OONISHI MICHIOIBUKI RINTA
    • C07D501/00A61K9/14A61K31/545A61K31/546A61P31/04C07D501/04C07D501/12C07D501/20
    • C07D501/20
    • PURPOSE: To obtain crystal of a salt of ceftizoxime useful as an injection for preparation in use, having high stability and improved quickly dissolving properties, by mixing an aqueous solution of the salt of ceftizoxime with isopropyl alcohol, filtering separating out crystal and drying it.
      CONSTITUTION: An aqueous solution of a salt (e.g., Na or K) of ceftizomixe shown by the formula and isopropyl alcohol are sterilely filtered and mixed and separating out crystal of dihydrate of ceftizomixe is collected by filtration. The crystal is suspended in isopropyl alcohol to give a suspension, which is dividedly added to vials and dried under vacuum, to give anhydrous crystal. The concentration of the aqueous solution of the salt of ceftizomixe is about 30W50W/V%, and the blending ratio of the aqueous solution and the alcohol is about 1:3. Crystal of the salt of ceftizoxime containing neither admixture nor amorphous crystal is obtained, and reduction in titer of the anhydrous crystal is not observed even by allowing it to stand at 50°C for three months.
      COPYRIGHT: (C)1982,JPO&Japio
    • 目的:通过将头孢唑肟盐的水溶液与异丙醇混合,得到头孢佐肟盐,得到头孢唑肟盐,其结晶为可用作制备用注射剂,具有高稳定性和改善的快速溶解性能,过滤分离出晶体并干燥。 构成:将由式和异丙醇所示的头孢噻肟的盐(例如Na或K)的水溶液无菌过滤并混合,并通过过滤分离出头孢噻肟二水合物的晶体。 将晶体悬浮在异丙醇中,得到悬浮液,将其分批加入小瓶中并在真空下干燥,得到无水晶体。 头孢曲松盐的水溶液浓度约为30-50W / V%,水溶液和醇的混合比为约1:3。 得到不含混合物和无定形晶体的头孢唑肟盐的晶体,即使在50℃下放置三个月也无法观察到无水晶体滴定度的降低。