... detergent additives Complex sodium di-silicate (CSDS) is a new type of environmental pollution-free phosphate-free detergent additives, which ... sodium silicate or sodium metasilicate, 4A zeolite, it is a second amorphous silica sodium compound, molecular formula as Na2O5Si2 ... metal cleaning agent washing industry Preparation of a new type phosphate-free detergent builder.-Complex Sodium Disilicate