Title: Maleamic Acid

CAS Registry Number: 557-24-4

CAS Name: (Z)-4-Amino-4-oxo-2-butenoic acid

Additional Names: maleic acid monoamide

Molecular Formula: C4H5NO3

Molecular Weight: 115.09

Percent Composition: C 41.74%, H 4.38%, N 12.17%, O 41.70%

Literature References: Prepd by passing ammonia into a mixture of maleic anhydride and an inert solvent such as xylene, dioxane, etc.: Robinson, Humburger, US 2459964 (1949 to Beck, Koller).

Properties: Crystals from alcohol, mp 172-173°. Also reported as mp 178-180° (dec). Very sol in water, hot alcohol. Practically insol in ether, chloroform, benzene.

Melting point: mp 172-173°; mp 178-180° (dec)