Noun
sulfur trioxide (uncountable)
(inorganic chemistry) A corrosive liquid, SO3, which forms sulfuric acid on contact with water; made commercially by the oxidation of sulfur dioxide.
For example, sulfur trioxide is not produced quantitatively by the combustion of sulfur. Source: Internet
This combustion process produces gaseous sulfur dioxide ( SOmain ) and sulfur trioxide ( SOmain ) which are then used to manufacture "new" sulfuric acid. Source: Internet
Diethyl sulfate and triethyl phosphate are prepared by treating ethanol with sulfur trioxide and phosphorus pentoxide respectively. Source: Internet
The chemicals most often released are chlorine and sulfur trioxide. Source: Internet
This reaction is reversible and the formation of the sulfur trioxide is exothermic. Source: Internet
When they reach temperatures above 300 °C, sulfuric acid begins to decompose into sulfur trioxide and water, both in the gas phase. Source: Internet