Tartaric Acid is the principal acid in wine grapes. Adding 8/10 of a teaspoon of tartaric acid to each gallon of wine will result in an increase of 0.10%., Food-grade acid for use in wine making, Enhances flavor, inhibits bacteria and preserves wine, Used in pharmaceuticals, cosmetics, industrial products and textiles, Country of origin - United States, Manufacturer name - Midwest Homebrewing and Winemaking Supplies.