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分子式：C2Na2O4
分子量：134.00
性狀：白色結晶性粉。溶于水，不溶于乙醇。
| Na2C2O4含量不少于 | 99.8% |
| pH值(50g/L溶液，25ºC) | 7.5-8.5 |
| 雜質最高含量(指標以%計) | |
| 澄清度試驗 | 合格 |
| 水不溶物 | 0.005 |
| 干燥失重 | 0.01 |
| 氯化物(Cl) | 0.001 |
| 總氮量(N) | 0.001 |
| 硫化合物(以SO4計) | 0.002 |
| 鉀(K) | 0.005 |
| 鐵(Fe) | 0.0002 |
| 重金屬(以Pb計) | 0.001 |
| 易碳化物質 | 合格 |
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