Sodium Metabisulphite(E223) is powder form and Sulphur Dioxide(E220) is gas form. In the production process of factory E223 turn to be E220, kuiburi issued the document base on first form of Sulphur Dioxide that causes different from other supplier. Finally, E223 & E220 are the same result. When we bring the goods to test, the result will be SO2(gas form).