| 項目 Item | 質量標準 Quality Specification |
| 感官要求 Visual | 白色結晶或結晶性粉末，味甜，無結塊，無異味 |
| 肌醇含量 Assay | ≥97% |
| 水分 Loss on drying | ≤0.5% |
| 熾灼殘渣 Residue on ignition | ≤0.1% |
| 熔點 Melting point | 224℃~227 ℃ |
| 氯化物 Chloride | ≤0.005% |
| 硫酸鹽 Sulphate | ≤0.005% |
| 鐵鹽 Calcium | ≤5ppm |
| 鈣 Iron | 合格 Complies |
| 總重金屬 Heavy Metals | ≤5ppm |
| 鉛 Pb | ≤0.5ppm |
| 砷 As | ≤0.5ppm |
