Lead silicate

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A white, crystalline powder that is made by the reaction of Lead acetate and Sodium silicate. Lead silicate is noncombustible and is used in fireproofing fabrics. It is also used as a glaze for ceramics and a pigment in water-based wood primers.

Synonyms and Related Terms

lead metasilicate; lead bisilicate; lead frit; alamosite


  • Toxic by inhalation or ingestion.
  • Noncombustible but may form lead fumes during firing.
  • Skin contact may cause irritation or ulcers.
  • Carcinogen, teratogen, suspected mutagen.
  • EChemi: SDS

Physical and Chemical Properties

Insoluble in most solvents.

Composition PbSiO3
CAS 10099-76-0
Melting Point 710-800 C

Resources and Citations

  • G.S.Brady, Materials Handbook, McGraw-Hill Book Co., New York, 1971 Comment: p. 444
  • Richard S. Lewis, Hawley's Condensed Chemical Dictionary, Van Nostrand Reinhold, New York, 10th ed., 1993
  • Michael McCann, Artist Beware, Watson-Guptill Publications, New York City, 1979
  • Guy Weismantel, Paint Handbook, McGraw-Hill Book Company, New York, 1981

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