Potassium hydrogen tartrate is an acid salt of tartaric acid. It is denoted by the chemical formula KC4H5O6 and has a molecular weight of 188.18. It is made up of 25.53% carbon, 51.01% oxygen, 20.78% potassium, and 2.68% hydrogen, and has a density of 1.95 g/cc. When purified, it is an odorless, white, crystalline powder that has a pleasant acidulous taste. It is used as a leavening agent in baking powders and forms naturally during wine fermentation.
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