Glyoxalic Acid
also called glyoxylic acid, C₂H₂O₃ or CO:OH a dyad compound, containing an aldehyde and an acid radical. Obtained along with glyoxal by oxidation of ethyl-alcohol with nitric acid; also by heating at 140° one part of dichloracetic acid, CHCI COOH with 10 parts of water for 24 hours.
Glyoxalic acid is a thick syrup, which a current of steam. It is a monobasic can be crystallized over H2So4. It is very soluble in water, and can be distilled in a current of steam. It is a monobasic acid, forming crystalline salts called glywater, yields calcium glycollate and cal- alic acid, when boiled with excess of lime verted into oxalic gen it is reduced to glycollic acid. It has also the properties of an aldehyde, reducing ammoniacal solutions of silver calic acid; by nascent hydrosalts, forming a unites with alkaline bisulphites. Glyoxalic acid, when boiled with excess of lime lime, evaporated to a syrup, and ex- the filtered liquid is boiled with milk of monia, glycosine separates as a powder, cool on ice, with a slight excess of am- stance obtained by treating glyoxal, kept GLYOXALINE, in chemistry, a suba metallic min mirror; also cium oxalate. alcoholic solution. tracted with alcohol, and distilling the cool on ice, with a slight excess of ammonia, glycosine separates as a powder, the filtered liquid is boiled with milk of lime, evaporated to a syrup, and extracted with alcohol, and distilling the alcoholic solution.