What is "mucic acid"

n. (context organic compound English) A dicarboxylic acid, also known as galactaric acid, HOOC-(CHOH)₄-COOH, produced by the oxidation of the milk sugar galactose. A test for the presence of galactose and/or lactose.

n. a solid acid (C6H10O8) found in milk or sugar

Mucic acid, CHO or HOOC-(CHOH)-COOH, (also known as galactaric or meso-galactaric acid) is an aldaric acid obtained by nitric acid oxidation of galactose or galactose-containing compounds such as lactose, dulcite, quercite, and most varieties of gum.