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Names | |||
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Systematic IUPAC name | |||
Other names
Octasulfur
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Identifiers | |||
3D model (JSmol)
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ChEBI | |||
ChEMBL | |||
ChemSpider | |||
2973 | |||
MeSH | Cyclooctasulfur | ||
PubChem CID
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UNII | |||
CompTox Dashboard (EPA)
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Properties | |||
S8 | |||
Molar mass | 256.48 g·mol−1 | ||
Appearance | Vivid, yellow, translucent crystals | ||
Density | 2.07 g/cm3 | ||
Melting point | 119 °C; 246 °F; 392 K | ||
Boiling point | 444.6 °C; 832.4 °F; 717.8 K | ||
log P | 6.117 | ||
Thermochemistry | |||
Std molar
entropy (S⦵298) |
32 J·mol−1·K−1[3] | ||
Std enthalpy of
formation (ΔfH⦵298) |
0 kJ/mol[3] | ||
Related compounds | |||
Related compounds
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Hexathiane | ||
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Octasulfur is an inorganic substance with the chemical formula S8. It is an odourless and tasteless yellow solid, and is a major industrial chemical. It is the most common allotrope of sulfur and occurs widely in nature.[4]