Dictionary entry overview: What does isle mean? â¢ ISLE (noun) The noun ISLE has 1 sense: 1. a small island Familiarity information: ISLE used as a noun is very rare.
The sulfate ion is SO42- The sulfite ion is SO32- and is more basic that sulfate.
Finally, sulfur is a chemical element that is used in the production of countless pharmaceutical and commercial chemicals and is present in (and responsible for the names of) sulfa drugs, sulfite preservatives, and sulfates.