Scientific Opinion on the re-evaluation of sulfur dioxide (E 220), sodium sulfite (E 221), sodium bisulfite (E 222), sodium metabisulfite (E 223), potassium metabisulfite (E 224), mercoledì 15 giugno 2016 calcium sulfite (E 226), calcium bisulfite (E 227) and potassium bisulfite (E 228) as food additives1