Tin(II) oxide

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Tin(II) oxide
PbO structure.png
Tin(II) oxide.jpg
Tin(II) oxide hydrate (2).JPG
IUPAC name Tin(II) oxide
Other names Stannous oxide, tin monoxide
CAS number 21651-19-4
PubChem 88989
EC number 244-499-5
RTECS number XQ3700000
Molecular formula SnO
Molar mass 134.709 g/mol
Appearance black or red powder when anhydrous, white when hydrated
Density 6.45 g/cm3
Melting point

1080 °C, 1353 K, 1976 °F

Solubility in water insoluble
−19.0·10−6 cm3/mol
Crystal structure tetragonal
Std enthalpy of
−285 kJ·mol−1[1]
Standard molar
56 J·mol−1·K−1[1]
Flash point Non-flammable
Related compounds
Other anions Tin sulfide
Tin selenide
Tin telluride
Other cations Carbon monoxide
Silicon monoxide
Germanium(II) oxide
Lead(II) oxide
Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)

Tin(II) oxide, also known as stannous oxide, is a chemical compound. Its chemical formula is SnO. It has tin in an oxidation state of +2. It also has oxide ions in it.

Properties[change | change source]

It is normally a blue-black solid. It can be red but the red form is more unstable. It burns in air with a green flame to make tin(IV) oxide. It is a reducing agent. It is rarer than tin(IV) oxide. It dissolves in acids to make a colorless solution.

Preparation[change | change source]

It can be made by reacting sulfuric acid with tin and reacting the tin(II) sulfate made with sodium hydroxide to make the tin(II) oxide hydrate. This is heated to get the tin(II) oxide.

Uses[change | change source]

It is used in touchscreens. It is used to make a glass with gold in it called ruby glass.

Related pages[change | change source]

References[change | change source]

  1. 1.0 1.1 Zumdahl, Steven S. (2009). Chemical Principles 6th Ed. Houghton Mifflin Company. p. A23. ISBN 0-618-94690-X.