Glyoxylic acid monohydrate is a chemical compound with the molecular formula C2H2O3·H2O. It exists as colorless to pale yellow crystals and is soluble in water and ethanol. This compound is used in various industrial applications, including as a chemical intermediate for the synthesis of pharmaceuticals, agrochemicals, and fine chemicals. It also finds use in cosmetic formulations and as a cross-linking agent in certain polymerization processes.