Tin(II) oxide
| Tin(II) oxide | |
|---|---|
_oxide.JPG)
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| General | |
| Systematic name | Tin(II) oxide |
| Other names | Stannous oxide; tin monoxide |
| Molecular formula | SnO |
| Molar mass | 134.69 g/mol |
| Appearance | white (hydrated) or blue-black (anhydrous) crystalline solid |
| CAS number | CAS number::21651-19-4 |
| Properties | |
| Density | [[Density::6.45 g/cm3]] |
| Solubility in water | Insoluble in water |
| Melting point | Melting point::1080°C (decomposes) |
| Related compounds | |
| Related compounds | SnO2 |
| Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa) Disclaimer and references | |
Tin(II) oxide, also known as stannous oxide or tin monoxide is a chemical compound with the formula SnO. Its molar mass is 134.71 g/mol. It comes in two forms, a pale white hydrated form and a blue-black anhydrous form. The hydrated form can be dehydrated by heating it gently. There is also an unstable red form. Tin(II) oxide is made by reacting an alkali with tin(II) chloride. This makes the hydrate. Tin(II) oxide burns in air when strongly heated, making a green flame and tin dioxide fumes.[1] It is a reducing agent. It is used to make ruby glass, touchscreens, catalysts for esterification[2], and other tin compounds. When heated in a vacuum or an inert atmosphere tin(II) oxide (oxidation state of 2) disproportionates into tin metal (oxidation state of 0) and tin dioxide (oxidation state of 4). The electronic band gap of tin(II) oxide is between 2.5eV and 3eV.[3]
Tin(II) oxide hydrate, a pale white solid
The green flame in the aluminium foil dish is the tin(II) oxide burning
_oxide_hydrate.JPG)
_oxide_burning.JPG)
See also
References
- Compounds of tin by WebElements™ periodic table
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