Tartaric+Acid

Tartaric Acid Tartaric acid is a white crystalline diprotic organicacid. It occurs naturally in many plants, particularly grapes, bananas, and tamarinds; is commonly combined with baking soda to function as a leavening agent in recipes, 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. It is a dihydroxyl derivative of succinicacid. Tartaric acid was first isolated from potassiumtartrate, known to the ancients as tartar, c. 800 by the alchemist Jabir ibnHayyan. The modern process was developed in 1769 by the Swedish chemist Carl [| Wilhelm Scheele]. Tartaric acid played an important role in the discovery of [|chemical chirality]. This property of tartaric acid was first observed in 1832 by [|Jean Baptiste Biot], who observed its ability to rotate polarized light. [|Louis Pasteur] continued this research in 1847 by investigating the shapes of [|ammonium sodium tartrate] crystals, which he found to be chiral. By manually sorting the differently shaped crystals under magnification, Pasteur was the first to produce a pure sample of levotartaric acid. Naturally occurring tartaric acid is chiral, meaning that it has molecules that are non-superimposable on their mirror images. It is a useful raw material in organic chemistry for the synthesis of other chiral molecules. The naturally occurring form of the acid is dextrotartaric acid.