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.

在洗衣粉中掺入剂，例如次氮基三酸酯（NTA）或者是四酸酯（EDTA），这些剂于形成水溶性的金属。