L-缬氨酸
分子量:117.15
CAS号:72-18-4
L-缬氨酸 |
EP6.0 |
AJI92 |
USP40 |
性状 |
应为白色或类白色的结晶性粉末 |
应为白色结晶或结晶性粉末 |
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鉴别 |
红外光吸收图谱应与对照图谱一致 |
应符合规定 |
应符合规定 |
含量 |
98.5-101.0% |
99.0%~100.5% |
98.5%~101.5% |
PH |
5.5~6.5 |
5.5~6.5 |
5.5~7.0 |
透光率 |
--- |
≥98.0% |
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干燥失重 |
≤0.5% |
≤0.20% |
≤0.3% |
炽灼残渣 |
≤0.1% |
≤0.10% |
≤0.1% |
氯化物 |
≤0.020% |
≤0.020% |
≤0.05% |
重金属 |
≤10ppm |
≤10ppm |
≤15ppm |
铁盐 |
≤10ppm |
≤10ppm |
≤30ppm |
硫酸盐 |
≤0.03% |
≤0.020% |
≤0.03% |
细菌内毒素 |
<20EU/g |
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--- |
砷盐 |
--- |
≤1ppm |
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铵盐 |
≤0.02% |
≤0.02% |
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其他氨基酸 |
应符合规定 |
应符合规定 |
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热源 |
--- |
应符合规定 |
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相关化合物 |
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--- |
应符合规定 |
比旋度 |
﹢26.5°~﹢29.0° |
+27.6°~ +29.0° |
﹢26.6°~﹢28.8° |
溶液澄清度 |
溶液澄清度:2.5%的水溶液应澄清 |
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溶液色级:2.5%的水溶液不应比BY6的参比溶液的颜色更深 |
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|
溶解度 |
溶于水,极微溶于酒精 |
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