Uramil
Title: Uramil
CAS Registry Number: 118-78-5
CAS Name: 5-Amino-2,4,6(1H,3H,5H)-pyrimidinetrione
Additional Names: 5-aminobarbituric acid; dialuramide; 5-amino-2,4,6-pyrimidinetriol
Molecular Formula: C4H5N3O3
Molecular Weight: 143.10
Percent Composition: C 33.57%, H 3.52%, N 29.36%, O 33.54%
Literature References: Prepd by boiling alloxantin with ammonium chloride: Wöhler, Liebig, Ann. 26, 241 (1838); by reduction of 5-nitrobarbituric acid with tin and HCl: Hartman, Sheppard, Org. Synth. coll. vol. II, 617 (1943); from barbituric acid, sodium nitrite and sodium hydrosulfite: Koppel, Robins, J. Am. Chem. Soc. 80, 2751 (1958).
Properties: Crystals. Discolors in the air. Does not melt below 400°. Insol in cold water, in ether, chloroform; sparingly sol in hot water; sol in solns of alkali hydroxides, in ammonia and in sulfuric acid. Forms a slightly sol lead salt.

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