sulphur dioxide


General English


  • E220, a pungent and irritating gas which dissolves in water to form sulphurous acid or its salts the sulphites, hydrogen sulphites and metabisulphites, all of which liberate the gas in solution. It is one of the most common preservatives used in foods.


  • a chemical used to inhibit natural microorganisms from spoiling the wine during the winemaking process