详情介绍
L-丙氨酸
L-Alanine
Cas 号: 【56-41-7】 M D L: MFCD00064410
L-丙氨酸分子式: C3H7NO2 分子量: 89.1
别 名: L-初油氨基酸,α-氨基丙酸,氨基丙酸
(S)-2-Aminopropionic acid
L-α-Aminopropionic acid
Ala
99% 100g
99% 500g
99% 1kg
性 状: 白色结晶粉末。无气味。有特殊甜味,易溶于水(166.5g/l水,25℃),微溶于乙醇(0.2%/80%冷酒精),不溶于丙酮等有机溶剂。甜度约为蔗糖的70%。200℃以上开始升华,化学性能稳定。5%水溶液的PH值5.5-7.0。天然品存在于羊毛,绢丝等中。
熔点:314-316℃
[a]20/D: 14.5° (c=10,6N HCl)
质量标准: 外观Appearance 白色类白色结晶或结晶粉末
红外光谱鉴别Infrared spectrometry 和对照品匹配
纯度Purity ≥99.0% (以干基计)
干燥损失Loss on drying <0.2 % (105°C, 3 小时)
重金属Heavy metals (as Pb) <10 ppm
pH 5.5 - 7 (2.5% 溶液,25°C)
其它氨基酸Other amino acids <0.5 % (TLC)
比旋度Specific rotation [a]20/D +13.5° - +15.5°(c=10, 6 N HCl) 以干基计
痕量分析Trace analysis :
Fe < 10 PPM
Cl < 200 PPM
NH4 < 200 PPM
SO4 < 200 PPM
透光度Transmittance >95 % (c=10, H2O, 430 nm) 1 cm cell
贮 存: 密封阴凉干燥保存。
用途 生化研究。组织培养。肝功能测定。属于非必需氨基酸,是血液中含量zui多的一种氨基酸,有重要生理作用。
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