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.
Examples of sulfites include: 1  sodium sulfite. 2  sodium bisulfite. 3  sodium metabisulfite. 4  potassium bisulfite. 5  potassium metabisulfite.