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sulfur tetroxide
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sulfur tetroxide

chemical compound
Also known as: sulphur tetroxide
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Quick Summary

Sulfur tetroxide (SO4) is an unstable compound of sulfur and oxygen that melts at approximately 0° C (32° F). It is formed by an electric discharge in a mixture of sulfur dioxide or trioxide and oxygen.1

While sulfur dioxide (SO2) and sulfur trioxide (SO3) are the most significant sulfur oxides, with SO3 being the acid anhydride of sulfuric acid, SO4 is among several other less common oxides of sulfur mentioned, including the monoxide (SO) and sesquioxide (S2O3).12

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2 Britannica Sources
  1. sulfur oxide
  2. oxide - Oxides of sulfur

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