| Section2 = }} Glyoxal is an organic compound with the formula OCHCHO. This yellow-coloured liquid is the smallest dialdehyde (two aldehyde groups). Production Commercial glyoxal is prepared either by the gas phase oxidation of ethylene glycol in the presence of a silver or copper catalyst or by the liquid phase oxidation of acetaldehyde with nitric acid. Global nameplate capacity is ~220,000 tons, with production rates less, due to over-capacity mostly in Asia. Most production is done via the… (More on Glyoxal)