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| ITEM | STANDARD |
| Appearance | White to cream colored powder |
| Purity (dry basis, %) | >= 98 |
| Viscosity (1%, 25℃, mPa.s ) | >= 5000 |
| Degree of substitution | 0.6 - 0.9 |
| pH (1% solution) | 6.0- 8.5 |
| Loss on drying (%) | =< 10 |
| Iron | =< 0.02% |