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L-色氨酸
中文名称：L-色氨酸
CAS NO.：73-22-3
中文别名：L-2-氨基-3-吲哚基丙酸; ( /-)-2-氨基-3-(3-吲哚基)丙酸; L-2-氨基-3-吲哚基-1-丙酸; L-氨基吲哚丙酸; L-色氨基酸; L-胰化蛋白氨基酸; L-2-氨基-3-吲哚基-丙酸; L-色胺酸
英文名称：L-Tryptophan
密度： 1.34
熔点： 280-285°C
比旋光度： -31.1° (c=1, H20)
水溶性： 11.4 g/L (25°C)
沸点：447.9°C at 760 mmHg
闪点：224.7°C
蒸汽压：8.3E-09mmHg at 25°C
产品规格
| L-色氨酸 | USP32 | AJI92 | CP2015 | EP8 |
| 含量 | 98.5-101.5% | 99.0-100.5% | ≥99.0% | 98.5-101.0% |
| 酸度 | 5.5-7.0 | 5.4-6.4 | 5.4-6.4 | / |
| 比旋度[a]D20 | / | -30.5°--32.5° | -30.0°--32.5° | -30.0°--33.0° |
| 比旋度[a]D25 | -29.4°--32.8° | / | / | / |
| 透光 | / | ≥95.0% | ≥95.0% | clear & colorless ≤BY6 |
| 氯化物 | ≤0.05% | ≤0.02% | ≤0.02% | ≤0.02% |
| 铵盐 | / | ≤0.02% | ≤0.02% | ≤0.02% |
| 硫酸盐 | ≤0.03% | ≤0.02% | ≤0.02% | ≤0.03% |
| 铁盐 | ≤30PPM | ≤20PPM | ≤20PPM | ≤20PPM |
| 重金属 | ≤15PPM | ≤10PPM | ≤10PPM | ≤10PPM |
| 砷盐 | / | ≤1PPM | ≤1PPM | / |
| 其他氨基酸 | / | conform | ≤0.50% | Impurity A≤10ppm Sum of impurities with a retention time less than that of Tryptophan <100ppm Sum of impurities with a retention time great than that of Tryptophan and up to 1.8 time of N-acetyltryptophan <300ppm |
| 茚三酮活性物质 | / | / | / | conform |
| 干燥失重 | ≤0.30% | ≤0.20% | ≤0.20% | ≤0.50% |
| 炽灼残渣 | ≤0.10% | ≤0.10% | ≤0.10% | ≤0.10% |
| 有机挥发物 | / | / | / | / |
| 内毒素 | / | / | <50eu/g | / |
