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 chemicals that are commonly used as preservatives for a range of different types of foods and beverages. For example, sulfites are often added to shellfish to prevent discoloring, processed foods to give them a longer shelf-life, and dehydrated fruits and veggies to preserve them.