Dr. Aude Watrelot, Jennie Savits, & Maureen Moroney | 2022
Sulfur dioxide (SO2) is an essential additive in winemaking. This chemical largely is used as a food and wine preservative for its antimicrobial and antioxidant properties. It inhibits, and in some cases kills, some yeast and bacteria. SO2 also protects grape must and wine from oxidation by enzymatic and chemical reactions, and therefore from browning and off-odors.