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sodium silicate

sodium silicate, any one of several compounds containing sodium oxide, Na2O, and silica, Si2O, or a mixture of sodium silicates. Sodium orthosilicate is Na4SiO4 (or 2Na2O·SiO2); sodium metasilicate is Na2SiO3 (or Na2O·SiO2); sodium disilicate is Na2Si2O5 (or Na2O·2SiO2); sodium tetrasilicate is Na2Si4O9 (or Na2O·4SiO2). All these compounds are transparent, glassy or crystalline solids that have high melting points (above 800°C) and are water soluble. They are produced chiefly by fusing sand and sodium carbonate in various proportions. The product is commonly known as water glass. The greatest single use of sodium silicates is as a raw material for making silica gel.

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water-glass

water‐glass Sodium silicate; used at one time to preserve eggs, by forming a layer of insoluble calcium silicate around the shell, and so sealing the pores.

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"water-glass." A Dictionary of Food and Nutrition. . Encyclopedia.com. 30 Apr. 2017 <http://www.encyclopedia.com>.

"water-glass." A Dictionary of Food and Nutrition. . Encyclopedia.com. (April 30, 2017). http://www.encyclopedia.com/education/dictionaries-thesauruses-pictures-and-press-releases/water-glass

"water-glass." A Dictionary of Food and Nutrition. . Retrieved April 30, 2017 from Encyclopedia.com: http://www.encyclopedia.com/education/dictionaries-thesauruses-pictures-and-press-releases/water-glass