Sulfur trioxide

Sulfur trioxide
Properties
Molecular formula	SO3
	Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)

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.

In popular culture

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

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Sulfur trioxide
Properties
Molecular formula	SO₃
Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)