Does it have sulfur in it?

If, for some reason, there were no sulfur in the world at any time: there would be no sulfa drugs there would be no steel as H2SO4 is an important chemical in steel manufacure fertilizer production...

Technically speaking, sulfur (note that it does NOT begin with a capital unless it is the first word in a sentence) is correct. 'Sulfur' is the international chemical term recommended by IUPAC...

33% because sulphur dioxyde is composed of two oxygen atoms and one of sulphur.

Oxygen is always 2-, so to balance the molecule SO2 the sulphur here must be 4+.

Sulfur.