What Preservative Is 220? Understanding Sulphur Dioxide
                                
                                
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                                    4 min read                                
                            
                                Sulphites, which include preservative 220 (sulphur dioxide), are used in food production and have been used for centuries, dating back to Roman times for winemaking. Preservative 220 is a widely used food additive known for its antimicrobial properties and ability to prevent oxidation.