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Ozone
Ozone-1,3-dipole.pngOzone-3D-space-filling.png   
General
Systematic name Trioxygen
Molecular formula O3
Molar mass 47.998 g/mol
Appearance bluish colored gas
CAS number [10028-15-6]
Properties
Density and phase 2.144 g/l (0 °C), gas
Solubility in water 0.105 g/100 ml (0 °C)
Melting point 75.95 K, −197.2 °C
Boiling point 161.25 K, −111.9 °C
Thermodynamic data
Standard enthalpy
of formation
ΔfH°solid
+142.3 kJ/mol
Standard molar entropy
S°solid
237.7 J.K−1.mol−1
Hazards
EU classification not listed
NFPA 704
Supplementary data page
Structure and
properties
n, εr, etc.
Thermodynamic
data
Phase behaviour
Solid, liquid, gas
Spectral data UV, IR, NMR, MS
Regulatory data Flash point,
RTECS number, etc.
Except where noted otherwise, data are given for
materials in their standard state (at 25 °C, 100 kPa)
Infobox disclaimer and references