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分子式：C11H12N2O2
分子量：204.23
CAS号：73-22-3
L-色氨酸 | EP6.0 | AJI92 | USP40 |
性状 | 应为白色或类白色结晶性粉末 | 应为白色至淡黄色白色结晶或结晶性末 | --- |
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% | 98.5%~100.5% | 98.5%~101.5% |
PH | --- | 5.4~6.4 | 5.5~7.0 |
透光率 | --- | ≥95.0% | --- |
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 | ≤20ppm | ≤20ppm | ≤30ppm |
硫酸盐 | ≤0.030% | ≤0.020% | ≤0.03% |
砷盐 | ≤1ppm | ≤1ppm | --- |
铵盐 | ≤0.02% | ≤0.02% | --- |
其他氨基酸 | 应符合规定 | 应符合规定 | --- |
热源 | --- | 应符合规定 | --- |
比旋度 | -30.0°～-33.0° | -30.0° ~ -32.5° | -29.4°~ -32.8° |
有机杂质 | --- | --- | 应符合规定 |
溶液澄清度 | 溶液不应比BY6的参比溶液颜色深 | --- | --- |
溶解度 | 少量溶于水，微溶于乙醇(96%)。它溶于无机酸和碱氢氧化物的稀溶液中。 | --- | --- |
