About two thirds of the human body and nine tenths of water is oxygen. In the laboratory it can be prepared by the electrolysis of water or by heating potassium chlorate with manganese dioxide as a catalyst. The gas is colorless, odorless, and tasteless. The liquid and solid forms are a pale blue color and are strongly paramagnetic. Pollutants in the atmosphere may have a detrimental effect on this ozone layer.
Undiluted ozone has a bluish color.
Liquid ozone is bluish black and solid ozone is violet-black. Compounds Oxygen, which is very reactive, is a component of hundreds of thousands of organic compounds and combines with most elements. Uses Plants and animals rely on oxygen for respiration. Hospitals frequently prescribe oxygen for patients with respiratory ailments. Isotopes Oxygen has nine isotopes.