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              產品中心您現在的位置:首頁 > 產品展示 > sigma試劑 > 生化試劑 > L-半胱氨酸

              L-半胱氨酸

              更新時間:2016-06-11

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              L-半胱氨酸
              L-Cysteine
              Cas 號: 【52-90-4 】 M D L: MFCD00064306
              L-半胱氨酸分子式: C3H7NO2S;HSCH2CH(NH2)CO2H 分子量: 121.16
              別 名: L-半膀胱氨基酸,L-2-氨基-3-巰基丙酸
              (R)-2-Amino-3-mercaptopropionic acid
              99% 25g
              99% 100g
              99% 500g
              性 狀: 無色結晶。其中性或微堿性水溶液能被空氣氧化成胱氨酸,酸性溶液較為穩定。水中溶解度:280 g/L (25°C),溶于醇,不溶于苯、丙酮、乙酸乙酯、二硫化碳。有刺激
              [α]20D 8.8 ° (C=8.00, 1mol/L HCl)
              質量標準: 99%,來源,動物毛發:
              外觀Appearance 白色或無色結晶
              紅外光譜鑒別Infrared spectrometry 和對照品匹配
              純度Purity >99.0 %(碘量滴定)
              水溶解試驗Solubility in Water 溶液透明
              干燥失重Loss on drying <0.5 % (105°C, 3 hrs)
              重金屬Heavy metals (as Pb) <10 ppm
              比旋度Specific rotation [a]20/D +8.2° ~ +9.4°(c=5, 2 N HCl)
              Cl < 300 ppm
              SO4 < 200 ppm
              NH4 < 500 ppm
              pH 4.5 - 6 (2.5% 水溶液)
              來源Origin 動物毛發
              品級Grade 非動物源,用于細胞培養
              (≥98%, from non-animal source, suitable for cell culture)
              外觀Appearance 白色結晶粉末
              紅外光譜鑒別Infrared spectrometry Conforms
              干燥損失Loss on Drying ≤0.50 %
              灼燒殘渣Residue on ignition (Ash) ≤0.05 %
              內毒素Endotoxin Level ≤1 EU/mg
              細胞培養測試Cell Culture Test Pass
              比旋光度Specific rotation [a]20/D 8.0 - 9.5 ° (C = 8 in 1 M HCl)
              氯Chloride ≤0.04 %
              鐵Iron ≤10.0 ppm
              重金屬Heavy metals ≤10.0 ppm
              銨Ammonium ≤300.0 ppm
              砷Arsenic ≤1 ppm
              茚三酮陽性物質Ninhydrin positive substances (each) ≤0.5 %
              含量Assay 98.0 - 101.0 %
              水溶解試驗Solubility in water at 20 °C 280 g/l
              pH 4.5 - 6
              來源Origin 發酵
              貯 存: 密封干燥避光保存。
              用途 生化及營養研究,制備組織培養基。醫藥上用作肝炎、肝中毒、銻劑中毒、放射性藥物中毒等的解毒劑。
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