Ozone
Ozone
IUPAC name
Trioxygen
Identifiers
CAS number
Properties
Molecular formula
O3
Molar mass
47.998 g·mol−1
Appearance
bluish colored gas
Density
2.144 g·L−1 (0 °C), gas
Melting point
80.7 K, −192.5 °C
Boiling point
161.3 K, −111.9 °C
Solubility in water
0.105 g·100mL−1 (0 °C)
Thermochemistry
Std enthalpy of
formation ΔfHo298
+142.3 kJ·mol−1
Standard molar
entropy So298
237.7 J·K−1.mol−1
Hazards
EU classification
not listed
Except where noted otherwise, data are given for
materials in their standard state
(at 25 °C, 100 kPa)
Infobox disclaimer and references
For other uses, see Ozone (disambiguation).
Ozone or trioxygen (O3) is a triatomic molecule, consisting of three oxygen [...]