| ≥1 piece |
| ITEM | STANDARD |
| CHARACTERISTIC | WHITE CRYSTAL POWDERS |
| IDENTIFICATION | PASS TEST |
| APPEARANCE OF SOLUTION | PASS TEST |
| ALKALINITY | PASS TEST |
| LOSS ON DRYING | 11.00-13.00% |
| HEAVY METALS | NOT MORE THAN 5PPM |
| OXALATES | NOT MORE THAN 100PPM |
| CHLORIDES | NOT MORE THAN 50PPM |
| SULPHATES | NOT MORE THAN 150PPM |
| PH VALUE (5% AQUEOUS SOLUTION) | 7.5-9.0 |
| PURITY | 99.00-100.50% |
| READILY CARBONISABLE SUBSTANCES | PASS TEST |
| PYROGENS | PASS TEST |
| ARSENIC | NOT MORE THAN 1PPM |
| LEAD | NOT MORE THAN 1PPM |
| MERCURY | NOT MORE THAN 1PPM |