sodium metasilicate

noun sodium meta·sil·i·cate \-ˌme-tə-ˈsi-lə-ˌkāt, -ˈsi-li-kət\

Definition of SODIUM METASILICATE

: a toxic corrosive crystalline salt Na₂SiO₃ used especially as a detergent or as a substitute for phosphates in detergent formulations

circa 1926

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