Disodium ethylenediamine tetraacetate is a good sequesterant. 乙二胺四乙酸二鈉是一種優秀的絡合劑。
Reagent pure phosphato-tungstic acid was prepared by reacting sodium tungstate with dis-odium hydrogen phosphate and acidifying with hydrochloric acid. 由鎢酸鈉與磷酸氫二鈉反應，再經鹽酸酸化製得了試劑級的磷鎢酸。
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