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.
Sulfites are substances that used as food additives and preservatives to maintain food color and prolong shelf-life, prevent the growth of micro-organisms, and maintain the potency of certain medications. Sulfites are used keep potatoes white and lettuce green, and are also used in the production of some food packaging materials (e.g. cellophane).