Sodium Metasilicate Pentahydrate
CAS NO.:  10213-79-3

EINECS NO.: 229-912-9

FORMULA: Na₂ SiO₃•5H₂O

MOL WT.: 212.74

UN NO.: 3253

IMD NO.: 8

H.S.CODE: 2839.1900

SYNONYMS:  Metso Beads, Silicic acid, disodium salt; Sodium-m-Silicate;

Orthosil; Disodium metasilicate; Disodium Monosilicate; Waterglass; Disodium trioxosilicate;

PHYSICAL STATE: white granule
 

APPLICATIONS: Detergents and soap, textile processing , pulp and paper, elastomers, disinfection agents, coatings, agriculture, ceramic industry.

GENERAL DESCRIPTION OF SODIUM SILICATE

Sodium silicate, also called water glass or Soluble Glass, is any one of several compounds containing sodium oxide, Na₂O, and silica, Si₂O, or a mixture of sodium silicates varying ratios of SiO₂ to Na₂O, solids contents, and viscosity. Sodium Orthosilicate is Na₄SiO₄; Sodium Metasilicate is Na₂SiO₃; Sodium Disilicate is Na₂Si₂O₅; Sodium Tetrasilicate is Na₂Si₄O₉. All these compounds are colorless, transparent, glasslike substance available commercially as a powder or as a transparent, viscous solution in water.They 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.The solutions are strongly alkaline.They are produced chiefly by fusing sand and sodium carbonate in various proportions. The use of sodium silicates is as a raw material for making silica gel. Also used as a detergent; as a cement for glass, pottery, and stoneware; for fireproofing paper, wood, cement, and other substances; for fixing pigments in paintings and cloth printing; and for preserving eggs.
 

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