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| ITEM | STANDARD |
| Appearance | Cream white free flowing powder |
| Purity (dry basis, %) | >= 95 |
| Degree of substitution | >= 0.9 |
| pH (1% solution) | 6.0- 8.0 |
| Loss on drying (%) | =< 10 |
| Apparent viscosity | =< 40 |
| API filtrate loss (ml) | =< 16 |
