L-蛋氨酸
分子量:149.21
CAS号:59-51-8
L-蛋氨酸 |
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 |
应符合规定 |
应符合规定 |
应符合规定 |
含量 |
99.0%~101.0% |
99.0%~100.5% |
98.5%~101.5% |
PH |
5.5~6.5 |
5.6~6.1 |
5.66.1 |
透光率 |
--- |
≥98.0% |
--- |
干燥失重 |
≤0.5% |
≤0.20% |
≤0.3% |
炽灼残渣 |
≤0.1% |
≤0.10% |
≤0. 4% |
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% |
砷盐 |
≤1ppm |
≤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 |
应符合规定 |
热源 |
--- |
应符合规定 |
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比旋度 |
+22.5°~ +24.0° |
+23.0° ~ +25.0° |
+22.4º—+24.7º |
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%的水溶液应为无色 |
--- |
--- |
|
溶解度 |
溶于水,极微溶于酒精 |
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