| Items | Specification |
|
| Apparence | White Powder or Crystalline |
| APHA (Color, 0.5M NaOH solution) | ≤20 |
| Solubility (Turbidity,0.5M NaOH solution) | Clear |
| Assay (Titration by HCI) | ≥99.5% |
| Infrared Spectrum Complies | Conforms to Structure |
| UV Absorbance 260mm 0.1M aqueous solution | absorbance≤0.03 |
| UV Absorbance 280mm 0.1M aqueous solution | absorbance≤0.03 |
| UV Absorbance 260mm 1.0M aqueous solution | absorbance≤0.05 |
| UV Absorbance 290mm 1.0M aqueous solution | absorbance≤0.05 |
| pH@ 25°C | 10.6~11.6 |
| Loss on drying(105℃ for 3 Hours) Wt% | ≤3.0% |
| Water insoluble | ≤0.03% |
| Heavy Metals Pb | ≤5ppm |
| Iron Fe | ≤5ppm |
| Chloride Cl | ≤5ppm |
| Calcium Ca | ≤10ppm |
