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Tetrasodium Salt (EDTA-4Na)
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Qanlity standard |
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項目 |
規(guī)格 |
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含量 |
≥99.5 |
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硫酸鹽(SO4) |
≤0.05 |
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重金屬 |
≤0.001 |
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金屬（鐵） |
≤0.001 |
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螯合值 |
≤220 |
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PH值 |
10.5-11.5 |
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NTA % |
≤0.1 |
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外觀 |
白色晶體粉末 |
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