Sulfur trioxide

chemical compound

Sulfur trioxide (sometimes spelled sulphur trioxide) is a chemical substance made of 1 sulfur and 3 oxygen atoms (SO3). It is very toxic and irritating. It can dissolve violently in water to make sulfuric acid. It is made by oxidation of sulfur dioxide. It contains sulfur in its +6 oxidation state.

Sulfur trioxide
Properties
SO3
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references
change

Sulfur trioxide is mentioned in the Emergency! episode "The Old Engine Cram".