ITEM | STANDARD |
Appearance | White to cream colored powder |
Purity (dry basis, %) | >= 98 |
Viscosity (2%, 25℃, mPa.s ) | 800 - 1200 |
Degree of substitution | >= 0.6 |
pH (1% solution) | 6.0- 8.5 |
Loss on drying (%) | =< 10 |
Sulphated ash (%) | 23 - 27 |
Iron | =< 0.02% |
Lead | =< 5 mg/kg |
Arsenic | =< 3 mg/kg |
Mercury | =< 1 mg/kg |
Cadmium | =< 1 mg/kg |
Total heavy metals (as Pb) | =< 15 mg/kg |