General Information:
Origin: China| Items | Standard |
| Characteristics | Pure white Crystalline powder, slightly hygroscopic |
| Solubility | Sparingly soluble in water,freely soluble in ethanol(96%);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% |