L-酪氨酸 L-Tyrosine
分子式:C9H11NO3 分子量:181.19
用 途:食品添加剂。也作饮料添加剂和配制人工昆虫饲料。
性 质:产品呈丝光细针状结晶或结晶性粉末。。
60-18-4
检测项目Item | AJI92 | USP26 |
含量Assay | 99.0~101.0% | 98.5~101.5% |
酸度pH | 5.0~6.5 | 5.0~6.5 |
比旋度Specific rotation | [a]D020 | -11.3~-12.1? |
| [a]D025 | -9.8~-11.2? |
溶液的透光度Transmittance(T430) | ≥98.0% |
|
Chloride(Cl) | ≤0.02% | ≤0.04% |
铵盐Ammonium(NH4) | ≤0.02% |
|
Sulfate(SO4) | ≤0.02% | ≤0.04% |
铁盐Iron(Fe) | ≤10ppm | ≤30ppm |
重金属(Pb) | ≤10ppm | ≤15ppm |
Arsenic | ≤1ppm(As2O3) | ≤1.5ppm(As2O3) |
其他氨基酸Other amino acids | Conforms |
|
干燥失重Loss on drying | ≤0.20% | ≤0.30% |
炽灼残渣Residue on ignition | ≤0.10% | ≤0.40% |
有机挥发物Organic volatile impurities |
| Conforms |