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Cyclooctatetraene

Compounds
1,3,5,7-Cyclooctatetraene is an unsaturated derivative of cyclooctane, with the formula C₈H₈. It is also known as [8]annulene. This polyunsaturated hydrocarbon is a colorless to light yellow flammable liquid at room temperature. Wikipedia
Molar mass: 104.15 g/mol
Density: 925 kg/m³
Formula: C8H8
3D model (JSmol): Interactive image
Autoignition temperature: 561 °C (1,042 °F; 834 K)
Boiling point: 142 to 143 °C (288 to 289 °F; 415 to 416 K)
NFPA 704 (fire diamond): 3 3 0