Partial pressure of oxygen in excess of two atmospheres may produce a variety of central nervous system manifestations including tingling of fingers and toes, visual and hearing disturbances, abnormal sensations, impaired coordination, confusion, muscle twitching, and seizures resembling those of epilepsy. Severe hazards may be present when confusion and impaired judgment lead to operational errors. Burns which result in blistering or deeper tissue freezing should be seen promptly by a physician. To fight fires, Shut off sources of oxygen and fight like conventional fire. Some materials which are noncombustible in air will burn in the presence of oxygen.
Liquid oxygen is pale blue and odorless.
Some materials will burn in pure oxygen which are nonflammable in air. Ventilate area to evaporate and disperse oxygen. Flush area with large quantities of water. Avoid smoking and contact with sources of ignition after exposure to concentration of oxygen higher than the normal atmosphere. Vent oxygen gas to outside location.