| ≥1 piece |
| items of analysis | specifition | result |
| characteristics | white or almost slightly yellow crystals or poder | conform |
| identfication | positive reaction | positive |
| clarity of solution | <=0.03 | 0.02 |
| arsenic | <=3ppm | conform |
| heavy metals | <=10ppm | conform |
| iron | <=2ppm | conform |
| sulphate | <=0.1% | <0.08% |
| specific optical rotation | +20.5---+21.5 | +20.7 |
| assay | 99.0%---100.5% | 99.5% |