What Are Sulfites And Why Are They In My Wine? Growing up in Oregon I would see the words “Contains Sulfites” on wine bottles and wonder, what in the world is a sulfite and why has it been added? The technical explanation: Sulfites are compounds that contain the sulfite ion SO2. The sulfite ion is the conjugate base of bisulfate. Although the acid itself is elusive, its salts are widely used. The term “sulfites” is an inclusive term for sulfur dioxide (SO2). SO2 is a preservative that is used in winemaking and most food industries because of the antioxidant and antibacterial properties. After doing a little research I discovered that sulfites (preservatives) are added either before the crush or after to prevent spoilage and oxidation (browning). Sulfites protect the wine from not only oxidation, but also bacteria. In other words it keeps your wine from going bad and turning brown. My research sources also tell me that sulfi...
Two friends on an adventure to learn and enjoy great wine. Thought we would share as we go, please come along with us.....LD & D