SYMPTOMS OF EXPOSURE Effects of exposure to high concentrations so as to displace the oxygen in the air necessary for life that causes dizziness, deeper breathing due to air hunger, possible nausea and eventual unconsciousness. It is also employed as an anesthetic when mixed with oxygen. These mixtures are generally 80 molar % N20 and 20 molar % 02. Persons in ill health where such illness would be aggravated by exposure to nitrous oxide should not be allowed to work with or handle this product. | 
