Physical Properties of Ozone
Ozone absorbs radiation strongly in the ultraviolet region of the atmospheric spectrum between 220-290 nm. This
protects the Earth and its inhabitants from the harmful ultraviolet radiation of the Sun. Without this protective
layer, more ultraviolet radiation would reach the surface of the Earth and cause damage to plant, animal and
Pure ozone is a blue gas, with a strong irritating smell. When inhaled, it causes headache and nausea. In smaller proportions it smells pleasant.
It is about 1.5 times heavier than air and has a vapor density of 24, corresponding to the formula O3.
It is more soluble than oxygen in water, about 49% by volume at 0°C.
It gets liquefied to a deep blue colour liquid, when cooled in liquid air.
It boils at 161.2 K and solidifies to violet-black crystals, which melt at 80.6 K.
It dissolves readily in turpentine oil and acetic acid.