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.
Sulfonation of aniline produces p-aminobenzenesulfonic acid or sulfanilic acid, which is a zwitterionic compound with an unusually high melting point. The amide of this compound and related compounds form a large group of sulfa drugs (a type of antibiotic).