Title: 1H-Purine
CAS Registry Number: 120-73-0
Additional Names: 7H-Imidazo[4,5-d]pyrimidine
Molecular Formula: C5H4N4
Molecular Weight: 120.11
Percent Composition: C 50.00%, H 3.36%, N 46.65%
Literature References: Prepd by heating 4,5-diaminopyrimidine with anhydr formic acid in a current of carbon dioxide: Isay, Ber. 39, 251 (1906); by boiling 2,6-diiodopurine with zinc dust and water under carbon dioxide: Fischer, ibid. 31, 2551, 2564 (1898).
Properties: Needles from toluene or alcohol, mp 216-217° (partial sublimation on rapid heating). Freely sol in water, hot alcohol. Slightly sol in hot ethyl acetate, acetone. Practically insol in ether, chloroform. Aq solns are neutral to litmus. Forms salts with acids and bases.
Melting point: mp 216-217° (partial sublimation on rapid heating)

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