Stannous oxide

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Dark brown to black powder. Stannous oxide as a Reducing agent. It is unstable in air converting to stannic oxide. Stannous oxide is used in Ceramic glazes and as a polishing material for Glass.

Synonyms and Related Terms

tin monoxide; tin protoxide; tin (II) oxide


  • Contact causes irritation.
  • Ingestion may cause vomiting and affect central nervous system.
  • Inhalation of fumes may cause metal fume fever.
  • Fisher Scientific: MSDS 08/02/2000

Physical and Chemical Properties

Soluble in acids and alkalis. Insoluble in water, ethanol.

Composition SnO
CAS 21651-19-4
Melting Point 1080 C
Molecular Weight mol. wt. = 134.69

Resources and Citations

  • 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

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