Names | |
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IUPAC name
Tin(II) oxide
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Other names
Stannous oxide
Tin monoxide | |
Identifiers | |
3D model (JSmol)
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ECHA InfoCard | 100.040.439 |
EC Number |
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PubChem CID
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RTECS number |
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UNII | |
CompTox Dashboard (EPA)
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Properties | |
SnO | |
Molar mass | 134.709 g/mol |
Appearance | black or red powder when anhydrous, white when hydrated |
Density | 6.45 g/cm3 |
Melting point | 1,080 °C (1,980 °F; 1,350 K)[1] |
insoluble | |
−19.0·10−6 cm3/mol | |
Structure | |
tetragonal | |
Thermochemistry | |
Std molar
entropy (S⦵298) |
56 J·mol−1·K−1[2] |
Std enthalpy of
formation (ΔfH⦵298) |
−285 kJ·mol−1[2] |
Hazards | |
Flash point | Non-flammable |
NIOSH (US health exposure limits): | |
PEL (Permissible)
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none[3] |
REL (Recommended)
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TWA 2 mg/m3[3] |
IDLH (Immediate danger)
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N.D.[3] |
Safety data sheet (SDS) | ICSC 0956 |
Related compounds | |
Other anions
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Tin sulfide Tin selenide Tin telluride |
Other cations
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Carbon monoxide Silicon monoxide Germanium(II) oxide Lead(II) oxide |
Tin dioxide | |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Tin(II) oxide (stannous oxide) is a compound with the formula SnO. It is composed of tin and oxygen where tin has the oxidation state of +2. There are two forms, a stable blue-black form and a metastable red form.