Item | Standard |
Appearance | crystals or crystalline powder |
Specific rotation[α]20/D (C=1 in NaOH) | +25.8° to +27.0° |
Ammonium (NH4) | Not more than 0.02% |
Sulfate (SO4) | Not more than 0.020% |
Heavy metal(Pb) | Not more than 10ppm |
Loss on drying | Not more than 0.50% |
Residue on ignition(sulfated) | Not more than 0.20% |
Assay | 98.5 to101.0% |
pH | 2.0 to 3.5 |
