Join the Terminal City Brewing Mailing List!
Enjoy savings, get advance notice on new products and receive exclusive subscriber-only specials as well as joining the Terminal City Brewing Loyalty Points Program!



Tartaric acid is a white crystalline organic acid. It occurs naturally in many plants, particularly grapes and tamarinds, and is one of the main acids found in wine. It is added to other foods to give a sour taste, and is used as an antioxidant. Salts of tartaric acid are known as tartrates. Its salt, potassium bitartrate, commonly known as cream of tartar, develops naturally in the process of winemaking.
As a note: some tartaric acid will drop out of suspension as potassium bitartrate if you are doing any cold stabilization. You might want to re-test total acidity after cold stabilization.