sodium silicate

noun Chemistry.
any of several clear, white, or greenish water-soluble compounds of formulas varying in ratio from Na 2 O⋅3.75SiO 2 to 2Na 2 O⋅SiO 2 : used chiefly in dyeing, printing, and fireproofing textiles and in the manufacture of paper products and cement.
Also called liquid glass, water glass. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
sodium silicate
1.  See water glass Also called: soluble glass a substance having the general formula, Na2O.xSiO2, where x varies between 3 and 5, existing as an amorphous powder or present in a usually viscous aqueous solution
2.  any sodium salt of orthosilicic acid or metasilicic acid

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Encyclopedia Britannica

sodium silicate

crystal-likecrystal-like lumps that range from colourless to white or grayish white and resemble glass but can be dissolved in water to form a syrupy liquid. Some forms are slightly soluble, and some are almost insoluble; they are best dissolved by heating with water under pressure. A little water dissolves water glass more readily than much water does. The solutions are strongly alkaline. The chemical formulas Na2SiO3, Na6Si2O7, and Na2Si3O7 describe the composition of various forms of water glass.

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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Example sentences
It can be encouraged to do this with substances such as sodium silicate in a process called deflocculation.
It also caused demand for a little known and little used mineral compound called sodium silicate.
PQ manufactures sodium silicate and sodium silicate derivatives worldwide.
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