sulphur trioxide
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: SO 3: Systematic name: sulphur(VI) oxide
Words Nearby sulphur trioxide
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
How to use sulphur trioxide in a sentence
sulphur trioxide forms thin needle-shaped crystals, arranged in feathery groups.
Poisons: Their Effects and Detection | Alexander Wynter Blythsulphur trioxide is a colorless liquid, which solidifies at about 15° and boils at 46°.
An Elementary Study of Chemistry | William McPhersonSmall quantities of sulphur trioxide (SO3) may also be formed in the combustion of sulphur.
An Elementary Study of Chemistry | William McPhersonsulphur trioxide is formed, and as it issues from the tube it is absorbed in water or dilute sulphuric acid.
An Elementary Study of Chemistry | William McPhersonSuch oxides as sulphur trioxide, nitrogen pentoxide, etc., do not possess acid properties except in combination with water.
Heroes of Science | M. M. Pattison Muir
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