An oxide containing three atoms of oxygen in its molecule or empirical formula.
- Sulfur is converted to sulfur dioxide and sulfur trioxide, and nitrogen compounds are converted to nitrogen oxides.
- The chemical toxicity of inhaled uranium trioxide (uranyl oxide) gas vapor fumes is much worse - about a million times worse - than the radiation from inhalation of any of the other oxides.
- Unstable nitrogen oxides, which we did not measure, including peroxynitrite, nitrogen dioxide, and dinitrogen trioxide, are important mediators of oxidation and nitration reactions in vivo.
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