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| test items | standards | test results |
| appearance | light brown powder | conforms |
| lignosulfonate content | 45-60% | 53 |
| solid content | ≥93.0% | 93.3 |
| ph (1% aqueous solution) | 9-10 | 9.5 |
| reducing substance | ≤4% | 3.7 |
| water content | ≤2.97% | 2.5 |
| water insoluble matters | ≤2.0% | 1.2 |
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