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                              L-組氨酸

                              更新時(shí)間:2016-06-03

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                              L-組氨酸
                              L-Histidine
                              Cas 號: 【71-00-1】 M D L: MFCD00064315
                              L-組氨酸分子式: C6H9N3O2 分子量: 155.16
                              別 名: (S)-2-氨基-3-(4-咪唑基)丙酸
                              (S)-2-Amino-3-(4-imidazolyl)propionic acid
                              His
                              L-2-Amino-3-(4-imidazolyl)propionic acid
                              99% 5g
                              99% 25g
                              99% 100g
                              99% 500g
                              性 狀: 無(wú)色針狀或片狀結晶。為天然的組氨酸。味甜。對空氣敏感。在227℃時(shí)軟化,287℃分解。水中溶解度為41.6 g/l (25°C),極微溶于乙醇,不溶于乙丙酮等有機溶劑,溶于無(wú)機酸。
                              熔點(diǎn): 282 °C
                              [a]20/D: 12.4° (c=11,6N HCl)
                              質(zhì)量標準: 99%:
                              外觀(guān)Appearance 白色結晶粉末,光照下會(huì )有顏色
                              紅外光譜鑒別Infrared spectrometry 和對照品匹配
                              含量Assay >99% (以無(wú)水物計)
                              干燥失重Loss on drying <0.2 % (105°C, 3 hrs)
                              重金屬Heavy metals (as Pb) <10 ppm
                              比旋度Specific rotation [a]20/D +12° ~ +12.8°(c=11, 6 N HCl)
                              NH4 < 100 ppm
                              Cl < 100 ppm
                              SO4 < 100 ppm
                              Fe < 10 ppm
                              透光率Transmittance >98 % (c=5, H2O, 430 nm) 1 cm cell
                              pH 7 - 8.5 (2% 水溶液)
                              其它氨基酸Foreign amino acids <0.3 % (TLC)
                              EP, USP ,非動(dòng)物源,用于細胞培養:
                              來(lái)源ORIGIN from non-animal source
                              外觀(guān)Appearance 白色至類(lèi)白色結晶粉末
                              紅外鑒別IDENTIFICATION BY IR 和參考標準*
                              水溶解試驗solubility in water 無(wú)色溶液 0.5G/10ML水
                              比旋光度Specific rotation [a]20/D +12.0°~ +12.8°(20°C /EP)
                              +12.6 ~ +14.0 DEG (25°C /USP)
                              C = 11 , 6M HCL
                              氯Chloride ≤0.020%
                              銨Ammonium ≤0.02%
                              鐵Iron ≤ PPM
                              重金屬Heavy metals ≤10 PPM
                              砷Arsenic ≤ 1 PPM
                              干燥損失Loss on drying ≤0.20%
                              灼燒殘渣Residue on ignition ≤0.10%
                              茚三酮陽(yáng)性物質(zhì)Ninhydrin-positive Substances(OTHER AMINO ACIDS)
                              CONFORMS
                              溶劑殘渣Residual solvents MEETS THE REQUIREMENTS
                              PH TEST 7.0 ~ 8.5 (2% IN WATER)
                              含量ASSAY (DRY BASIS) 98.5 ~ 101.0%
                              內毒素Endotoxin ≤ 1 EU/MG
                              細胞培養測試Cell culture test PASS
                              貯 存: 密封干燥避光保存。
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