描述
Widely distributed in nature as a fermentation product from starch, molasses, potatoes etc. "Natural" lactic acid is produced commercially by fermentation of beet/cane sugar or glucose. No commercial lactic acid is dairy-based. Synthetic lactic acid is a racemic mixture of the L- and D-forms. Among the oldest known preservatives used to preserve milk products and a broad range of traditional fermented vegetables. The modern use of lactic acid as a food additive covers several functions: flavouring, acidity control, preservation. Due to its mild flavour, lactic acid can be used in high concentrationsand is also in brewing, manuf. of cheese and confectionery
Lactic acid is chiral and has two optical isomers. One is known as L-(+)-lactic acid or (S)-lactic acid and the other, its mirror image, is D-(-)-lactic acid or (R)-lactic acid. L-(+)-Lactic acid is the biologically important isomer. Lactic acid is found in many foods, some of which are sunflower, apple, common grape, and borage.
InChI标识符
InChI=1S/C3H6O3/c1-2(4)3(5)6/h2,4H,1H3,(H,5,6)