sulfur trioxide

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Related to Sulphur trioxide: sulphur dioxide

sul·fur tri·ox·ide

SO3; forms sulfuric acid, H2SO4, by its reaction with water.
Synonym(s): sulfuric oxide
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Sulphur trioxide (S[O.sub.3]) forms through the atmospheric oxidation of S[O.sub.2] by ozone or by oxygen in a reaction catalysed by dust.
One of the major raw materials required to manufacture sulphonated asphalt is sulphur trioxide (SO3) which is not available in the region.
A kinetic study of sulphur trioxide formation in a pilot scale furnace // Mechanism of Corrosion by Fuel Impurities.
A refinery in Canada failed to inform the proper officials after it released five tons of sulphur trioxide (S[O.sub.3]) that passed over downtown Montreal.