| CONTENTS | STANDARD: DAB 10 |
| APPERANCE | WHITE OR ALMOST WHITE CRYSTALLINE POWDER |
| IDENTIFICATION | POSITIVE |
| PH | MEETS THE REQUIREMENTS |
| IDENTIFICATION | POSITIVE |
| SULFATE | NOT MORE THAN 0.1% |
| HEAVY METALS | NOT MORE THAN 0.004% |
| RELATED SUBSTANCE | MEETS THE REQUIREMENTS |
| LOSS ON DRYING | 4.9% ~ 5.3% |
| ASSAY | 98.0% ~ 101.0% |