| Item | Requirement | |
| Appearance | Light yellow powder | Light brown powder |
| Lignosulphonate assay | 50% Min. | 50% Min. |
| Inorganic salts (Na2SO4) | 5% Max. | 5% Max. |
| Reduced material | 12% Max. | 15-18% |
| Insoluble matter in water | 1.0% Max. | 1.0% Max. |
| Moisture content | 5.0% Max. | 5.0% Max. |
| As Content | 18% Max. | 18% Max. |
| PH | 4-6 | 4-6 |