Items | Standard |
Characteristics | Pure white Crystalline powder, slightly hygroscopic |
Solubility | Sparingly soluble in water,freely soluble in methanol,ethanol(96%);slightly soluble in acetone; practically insoluble in ether. |
Identify | (A)IR-Spectrum (B)Reaction of sodium salt |
Acidity or alkalinity | 6.5-7.5 |
Appearance of solution | Clear Absorption of sodium salt ≤0.05 |
Related Substances | Single impurity max 0.2% total impurity max 0.5% |
Heavy Metals | Max 10ppm |
Loss on drying | Max 0.5% |
Assay | 99.0~101.0% |