The effectiveness of sulfur dioxide as a preservative lies in its biochemical properties. As an antimicrobial agent, it disrupts the cellular processes of microorganisms, preventing their growth and reproduction. Furthermore, sulfur dioxide acts as an antioxidant, protecting food products from oxidative damage caused by exposure to oxygen, which can alter flavors, colors, and nutritional quality. In dried fruits like apricots and raisins, SO2 maintains their vibrant colors and enhances their overall appeal to consumers.