| L-组氨酸盐酸盐 | CP2020 | EP11 | AJI92 | 
| 含量 | ≥ 99.0% | 98.5-101.0% | 99.0-101.0 | 
| 酸度 | 3.5-4.5 | 3.0-5.0 | 3.5-4.5 | 
| 比旋度[a]D20 | +8.5°-+10.5° | +9.2°-+10.6° | +8.9°-+9.5° | 
| 比旋度[a]D25 | / | / | / | 
| 透光 | ≥ 98.0% | / | ≥98.0% | 
| 溶液外观 | / | clear & colorless ≤BY6 | / | 
| 氯化物 | 16.7%-17.1% | / | 16.66-17.08% | 
| 铵盐 | ≤0.02% | ≤0.02% | ≤0.02% | 
| 硫酸盐 | ≤0.02% | ≤0.03% | ≤0.02% | 
| 铁盐 | ≤10PPM | ≤10PPM | ≤10PPM | 
| 重金属 | ≤10PPM | / | ≤10PPM | 
| 砷盐 | ≤1PPM | / | ≤1PPM | 
| 其他氨基酸 | ≤0.02% | / | conform | 
| 茚三酮活性物质 | / | Each impurities≤ 0.2% Total impurities≤ 0.5%  | / | 
| 干燥失重 | ≤0.02% | 7.0-10.0% | ≤0.20% | 
| 炽灼残渣 | ≤0.10% | ≤0.10% | ≤0.10% | 
| 内毒素 | <6 EU/g | <6 EU/g | <6 EU/g | 
| 总菌 | ≤ 1000 CFU/g | ≤ 1000 CFU/g | ≤ 1000 CFU/g | 
| 霉菌&酵母菌 | ≤ 100 CFU/g | ≤ 100 CFU/g | ≤ 100 CFU/g |