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 chemical preservatives used in a range of foods including beverages such as wine and beer. They are added to processed foods to increase their shelf-life and even to some medications to keep them stable. Sulfites can trigger allergic reactions in some people, mainly those having asthma.