Tartaric acid is a white crystalline diprotic organic acid. The compound occurs naturally in many plants, particularly in grapes, bananas, and tamarinds. It is also one of the main acids found in wine.
Tartaric acid can be added to food when a sour taste is desired. It is also used as an antioxidant. Salts of tartaric acid are known as tartarates. The chemical is a dihydroxy derivative of succinic acid.
Tartaric acid is found in cream of tartar and baking powder. The chemical compound is used in silvering mirrors, tanning leather, and in Rochelle Salt. In medical analysis, tartaric acid is used to make solutions for the determination of glucose.
With one week lead-time, TCC ships Tartaric acid in 25kg bags, and 1,000kg supersacks throughout the continental United States.
Tartaric acid is a white solid possessing two alcohol groups and two acid groups. The second and third carbons of the molecule are asymmetrical (these are called chiral centers). The naturally occurring form of tartaric acid is the L-isomer, which rotates light to the left. The D-form of the acid, which rotates plane-polarized light to the right (the D refers to dextro, or right hand direction) is far less common in nature and has almost no practical uses.
In general, where biological molecules have optical isomers, only one of the isomers or forms will be active biologically. The other will be unaffected by the enzymes in living cells. The meso form of the molecule is not affected by polarized light.
The fourth form — the DL mixture, is not a single molecule, but a mixture of equal amounts of D and L isomers. It does not rotate polarized light (like the meso form) because the rotation of light by the D and L forms is equal in amount but opposite in direction. It is possible to separate the DL mixture into the two isomers, each of which does rotate light. In the 1840s, Louis Pasteur determined that each of the two isomers of tartaric acid rotated light in opposite directions, and the meso form was inactive in this respect. He also separated by hand, crystals of the racemic mixture to show that it was made of equal amounts of the D and L forms, making it different than the meso form of tartaric acid.
Tartaric acid is found in cream of tartar, which is used in making candies and frostings for cakes. Tartaric acid is also used in baking powder where it serves as the source of acid that reacts with sodium bicarbonate (baking soda). This reaction produces carbon dioxide gas and lets products “rise,” but it does so without the “yeast” taste that can result from using active yeast cultures as a source of the carbon dioxide gas.
Tartaric acid is used in silvering mirrors, tanning leather, and in the making of Rochelle Salt, which is sometimes used as a laxative. Blue prints are made with ferric tartarte as the source of the blue ink.
In medical analysis, tartaric acid is used to make solutions for the determination of glucose. Common esters of tartaric acid are diethyl tartarate and dibutyl tartrate. Both are made by reacting tartaric acid with the appropriate alcohol, ethanol or n-butanol. In the reaction the Hydrogen of the COOH acid group is replaced with an ethyl group (diethyl tartarate) or butyl group (dibutyl tartarate. These esters are used in manufacturing lacquer and in dyeing textiles.
TCC’s Tartaric acid is available for shipping throughout the continental United States with one (1) week lead time. Please call (401) 360-2800 for details. Tartaric acid is available in 25kg bags and 1,000kg supersacks.
The Chemical Company
44 Southwest Avenue
Post Office Box 436
Jamestown, RI 02835-0436
Robert N. Roach III “Robb”
Cell: (401) 864-3111