Appearance | White to off-white crystalline powder |
Melting Point | 111℃~116℃ |
Loss on Drying |
2.0% max. |
Lead(Pb) |
10 ppm max. |
Arsenic(As) |
2 ppm max. |
Mercury(Hg) |
1ppm max. |
Cadmium(Cd) |
5 ppm max. |
pH Value(3% aqueous solution) |
3.5~5.5 |
Residual VC |
10 ppm max. |
Assay |
99.0% min. |