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L-精氨酸
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更新时间:2016-05-31  |  阅读:1150

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L-精氨酸
L-Arginine
Cas 号: 【74-79-3】 M D L: MFCD00002635
L-精氨酸分子式: C6H14N4O2 分子量: 174.2
别 名: L-蛋白氨基酸,L-胍基戊氨酸,L-2-氨基-胍基戊酸,2-氨基-5-胍基戊酸
(S)-2-Amino-5-guanidinopentanoic acid
(S)-(+)-Arginine
Arg
98% 25g
98% 100g
98% 500g
98% 1kg
性 状: 从水中析出的白色棱形结晶,含2分子结晶水。从乙醇中析出的为无水单斜片状结晶。溶于水,微溶于乙醇。具强碱性,水溶液能从空气中吸收二氧化碳。水中溶解度: 148.7 g/l (20°C)
熔点:223-224 °C
[a]20/D: 27.1° (c=8, 6N HCl)
含2分子结晶水的在105℃失水,230℃时变棕色,244℃时分解。水中zui大吸收波长205nm(logε3.28)。
质量标准: 外观Appearance 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 >98.0 % (以干基计)
干燥损失Loss on drying <0.5 % (1 g, 105°C)
重金属Heavy metals (as Pb) <10 ppm
比旋度Specific rotation [a]20/D +25.8° - +28.5°(c=8, 6 N HCl) 以干基计
痕量分析Trace analysis Type:
SO4 < 200 ppm
Fe < 10 ppm
NH4 < 100 ppm
Cl < 200 ppm
溶解性Appearance of solution (10% in water) 无色透明
(备注:实际检测纯度均在99%以上)
贮 存: 密封干燥避光保存。
用途 一氧化氮合成酶底物,能转换为瓜氨酸和NO。靠一种依赖于NO的机制诱导胰岛素分泌。
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