| PHYSICAL APPEARANCE | WHITE TO OFF WHITE CRYSTALINE POWDER FREE FROM ANY LUMPS. |
| ASSAY | 99% MIN. |
| ASH | 0.1% MAX. |
| MELTING POINT | 119 ºC ~123 ºC |
| IRON AS Fe | 0.001% MAX. |
| HEAVY METAL AS Pb (LEAD) | 0.001% MAX. |
| CLARITY OF 0.8% SOLUTION IN HOT WATER AT 600 C | CLEAR LIGHT ORANGE COLOURED FREE FROM ANY SUSPENDED MATTERS. |