Parabanic Acid
Title: Parabanic Acid
CAS Registry Number: 120-89-8
CAS Name: Imidazolidinetrione
Additional Names: imidazoletrione; oxalylurea
Molecular Formula: C3H2N2O3
Molecular Weight: 114.06
Percent Composition: C 31.59%, H 1.77%, N 24.56%, O 42.08%
Literature References: Prepd by the condensation of urea with diethyl oxalate in a methanol soln of sodium methoxide: Murray, Org. Synth. 37, 71 (1957).
Properties: Crystals, mp about 230°; also stated as 243° with decomposition. Sublimes at 100°. Soluble in about 20 parts water, in alcohol. Its salts are unstable.
Melting point: mp about 230°; also stated as 243° with decomposition.

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