tetraacetate

3, A chelating agent which forms an easily water-soluble metal chelated compound such as nitrilotriacetate (NTA) or ethylene diamine tetraacetate (EDTA) is incorporated in a detergent composition.

在洗衣粉中掺入合剂，例如次氮基三乙酸酯（NTA）或者是乙二胺四乙酸酯（EDTA），合剂于形性的金属合物。