What is the primary purpose of sulfites in winemaking?

The primary purpose of sulfites in winemaking is to stabilize and preserve the wine. Sulfites, primarily in the form of sulfur dioxide (SO2), play a vital role in protecting wine from oxidation and unwanted microbial activity, such as spoilage and fermentation from undesired yeast or bacteria. By preventing oxidation, sulfites help maintain the wine's freshness, aroma, and flavor over time.

Additionally, sulfites serve as antioxidants, which can prolong the shelf life of the wine and keep it stable during storage and transport. They are particularly effective in managing the effects of various environmental factors, including temperature fluctuations and exposure to air.

While other elements such as acidity, sweetness, and color in wine are important, the core function of sulfites is centered around preservation and stabilization, making them a fundamental component in the winemaking process.