By substituting one carboxymethyl group in the molecule of EDTA with a long chain alkyl,a polyfunctional surfactant having both surfactivity and ability of chelating metal ions was obtained.

• 以长链烷基替代EDTA分子中的一个乙酸基,使其改性为既具表面活性又有络合金属离子能力的多功能表面活性剂。