Mucic acid
Mucic acid, C6H10O8 or HOOC-(CHOH)4-COOH (galactaric acid 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. == Properties == Mucic acid forms a crystalline powder, which melts at 210–230 °C. It is insoluble in alcohol, and nearly insoluble in cold water.