The harm of STPP to ecological environment,as well as properties production and detergent application of its substitute instant dissolved sodium metasilicate powder were introduced in this article.

• 介绍了三聚磷酸钠对生态环境的危害和其代用品速溶粉状偏硅酸钠（无水）的性质、生产方法以及在洗涤剂中的应用。