更新時間:2016-06-03
L-組氨酸,純度高,品牌質(zhì)量、實驗效果好,我們保持著薄利多銷的宗旨,提供給客戶高標準的生化試劑。
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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: 無色針狀或片狀結(jié)晶。為天然的組氨酸。味甜。對空氣敏感。在227℃時軟化,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,溶于無機酸。
熔點: 282 °C
[a]20/D: 12.4° (c=11,6N HCl)
質(zhì)量標準: 99%:
外觀Appearance 白色結(jié)晶粉末,光照下會有顏色
紅外光譜鑒別Infrared spectrometry 和對照品匹配
含量Assay >99% (以無水物計)
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 ,非動物源,用于細胞培養(yǎng):
來源ORIGIN from non-animal source
外觀Appearance 白色至類白色結(jié)晶粉末
紅外鑒別IDENTIFICATION BY IR 和參考標準*
水溶解試驗solubility in water 無色溶液 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(nèi)毒素Endotoxin ≤ 1 EU/MG
細胞培養(yǎng)測試Cell culture test PASS
貯 存: 密封干燥避光保存。
用途 生化研究。
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