| Appearance | White to pale yellow powder |
| Assay | 98.50% max. |
| Loss on Drying | 20% max. |
| Heavy metals(Pb) |
0.001% max. |
| Arsenic |
0.0002% max. |
| pH Value(3% aqueous solution) |
7.0-8.5 |
| Color of solution(APHA) | 70max |
| Free ascorbic acid | 0.5%max. |
| Specific Optical Rotaion | +43°~ +50° |
| Free Phosphoric acid | 1% max. |
| Chloride | 0.35%max. |
| Total aerobic counts | 1,000CFU/g max. |