Ozone promptly gives off one of three oxygen atoms to other matters. Ozone blocks and absorbs ultraviolet in the stratosphere due to this property. This absorption ratio is approximately 99%. The harmful effect that ozone have against human body in the atmosphere is attributable to this high reactivity. It unconditionally combines any organic substance on skin to create material that is harmful or even fatal to human body.
This reactivity has not been understood fully. For example, it attacks cells of lung to deteriorate function of respiratory organ. What is more dangerous, it may hurt gene in the cellular nucleus to cause DNA mutation and to develop cancer. Soft tissue such as cornea of the eye is prone to the attack of ozone.
Ozone is highly toxic. If one is exposed to ozone at 1ppm 8 hours a day, it causes bronchitis, fibrosis in the tissue of lung and bronchiolitis. If one is exposed to ozone at 1.25ppm an hour, his/her breathing function deteriorates. If the concentration of ozone rises, it develops pulmonaryedema and bleeding and causes trouble in the gas exchange via the alveolar membrane. The allowed maximum ozone concentration is 0.1ppm for workers who work 8 hours a day.
|Toxicity of ozone|
|Ozone(ppm)||Effect on human body|
|0.1||Generates odor stimulative to nose or throat|
|0.2 ~ 0.5||Eye sight deteriorates after 3 to 6 hour exposure|
|0.5||Evidently stimulates airway and respiratory organ|
|1~2||Causes headache and phlegm. This symptom becomes chronic if exposed repeatedly|
|5~10||Causes rapid pulse and pulmonaryedema|
|15~20||Small animal may die within 2 hours|