|Molar mass||47.98 g mol-1|
|Appearance||Pale, blue gas|
|Density||0.002144 g cm-3 (at 0 °C)|
-192 °C, 81 K, -314 °F
-112 °C, 161 K, -170 °F
|Solubility in water||1.05 g dm-3 (at 0 °C)|
|Refractive index (nD)||1.2226 (liquid)|
|Hybridisation||sp2 for O1|
|Dipole moment||0.53 D|
|Std enthalpy of
|142.67 kJ mol−1|
|238.92 J K−1 mol−1|
|Related compounds||Sulfur dioxide
|Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)|
Ozone is a chemical with the symbol O3. This means one molecule of Ozone is made of 3 Oxygen atoms. Ozone is important to planet Earth as it soaks up or absorbs the dangerous ultraviolet radiation from the Sun, like a kind of sun screen. Without this ozone layer things would not have been able to live on the surface of our planet.
Ozone is toxic if breathed in. It irritates the eyes and respiratory system. For a 15-minute exposure, the concentration in the atmosphere should not exceed 0.4 mg/m3. Ozone is also called trioxygen.