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| Item | Specification | |
| Content% | 97% Min | 95% Min |
| NaOH% | 0.5% Max | 1.0% Max |
| Na2CO3% | 0.5% Max | 1.5% Max |
| NaCL% | 0.8%Max | 0.5% Max |
| Na2S | 0.2% Max | 0.1% Max |
| Water% | 1.2% Max | 1.2% Max |