6306. Murexide
Nomenclature
CAS number: 3051-09-0
5-[(Hexahydro-2,4,6-trioxo-5-pyrimidinyl)imino]-2,4,6(1H,3H,5H)-pyrimidinetrione ammonium salt
(1:1); 5,5′-nitrilodibarbituric acid monoammonium salt; acid ammonium purpurate; ammonium purpurate. C8H8N6O6; mol wt 284.19.
C 33.81%, H 2.84%, N 29.57%, O 33.78%.
Description and references
Prepn from alloxan + NH3: Hartley, J. Chem. Soc. 87, 1791 (1905); Schwartz, Handritschk, DD 17589 (1959), C.A. 55, 3630a (1961); from alloxantin + ammonium acetate: Davidson, J. Am. Chem. Soc. 58, 1821 (1936). Structure: Hartley, J. Chem. Soc. 87, 1796 (1905); Winslow, J. Am. Chem. Soc. 61, 2089 (1939); Schreiber, Mitt. Dtsch. Pharm. Ges. 28, 20 (1958).
Properties
Purple-red crystals with green metallic luster. Absorption max in water: 520 nm. Sparingly sol in cold water, more in hot water; practically insol in alcohol, ether. The H2O soln is deep purple and the aq NaOH soln is deep blue.Derivative
Monohydrate.Nomenclature
CAS number: 6032-80-0
C8H8N6O6.H2O; mol wt 302.20.
C 31.80%, H 3.34%, N 27.81%, O 37.06%.
Description and references
Crystal structure: R. L. Martin et al., J. Chem. Soc. Dalton Trans. 1977, 1336.