Cream of tartar, the potassium acid salt of tartaric acid, a white crystalline powder used as a leavening acid and stabiliser in food and winemaking.
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Potassium bitartrate (potassium hydrogen tartrate, cream of tartar) is a white crystalline powder that is a by-product of winemaking and the acidic potassium salt of tartaric acid. It is sparingly soluble in cold water and mildly acidic.
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