sulphur trioxide

(redirected from sulphur(VI) oxide)

sulphur trioxide

n
(Elements & Compounds) a white corrosive substance existing in three crystalline forms of which the stable (alpha-) form is usually obtained as silky needles. It is produced by the oxidation of sulphur dioxide, and is used in the sulphonation of organic compounds. Formula: SO3. Systematic name: sulphur(VI) oxide
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