Specification
Appearance | White or yellowish powder | White powder |
Identification | Infrared identification: The infrared absorption spectrum of the sample should be consister with that of the reference substance | Conform |
Assay(HPLC,dry basis) | ≥98.0% | 99.1% |
Active matter | ≥45.0% | 54.2% |
Water | ≤11.0% | 10.1% |
pH(3% aqueous solution) | 9.0-10.0 | 9.2 |
Clarity and color of solution(3% aqueous solution) | Clear and almost colourless | Conform |
Free phosphoric acid | ≤0.5% | <0.5% |
Chloride | ≤0.035% | <0.035% |