| Items | Specification | 
| Appearance | Yellow brownish or brownish powder | 
| PH value | 5.5 ~ 8.5 | 
| Moisture (%) | ≤ 7 | 
| Water insoluble matter (%) | ≤ 0.5 | 
| Reductive matter (%) | ≤ 12 | 
| Calcium and Magnesium content (%) | ≤ 1.0 | 
| Air content (%) | ≤ 3.8 | 
| Lignin sulfonate content (%) | ≥ 55 | 
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