Sodium Silicate

Sodium silicate appears as a powdered or flaked solid substance. Strong irritant to skin, eyes, and mucous membranes. May be toxic by ingestion. Concentrated aqueous solutions used as a glue. Sodium silicate is an inorganic sodium salt having silicate as the counterion. It contains a silicate ion.


Molar Weight122.063 g/mol
Melting Point1089 °C
FormsPowder, Liquid (clear)

Uses and Applications

Key applications

  • Water treatment
  • Ceramics
  • Corrosion inhibitor and anti-scaling agent
  • Adhesives and Sealants
  • Oil and Gas
  • Textile handling
  • Detergent
  • Paint and Coatings
  • Emulsifying agent
  • Zinc ore / mining


  • Food
  • Water Treatment
  • Coatings & Construction
  • Mining
  • Cleaning
  • Pulp & Paper

Synonyms: Sodium metasilicate, SODIUM SILICATE, Waterglass, Water glass, Sodium siliconate, Sodium polysilicate, Disodium metasilicate, Sodium sesquisilicate, Sodium silicate glass, Sodium silicate solution, Sodium water glass, Britesil, Crystamet, Orthosil

Chemical Formula: Na2SiO3

CAS Number: 1344-09-8