Structural Formula Vector Image
Title: Ichthyopterin
CAS Registry Number: 490-58-4
CAS Name: 2-Amino-6-(1,2-dihydroxypropyl)-4,7(1H,8H)-pteridinedione
Additional Names: 6-(1,2-dihydroxypropyl)isoxanthopterine; fluorescyanine
Molecular Formula: C9H11N5O4
Molecular Weight: 253.21
Percent Composition: C 42.69%, H 4.38%, N 27.66%, O 25.27%
Literature References: Found as a chromoprotein in skin and scales of fish. Isoln from minnows: Huttel, Springling, Ann. 554, 69 (1943); from carp: Polonovski et al., Helv. Chim. Acta 29, 1328 (1946). Structure: Kauffmann, Ann. 625, 133 (1959).
Properties: Rosettes of thin needles. Thermostable. uv max (0.1N NaOH): 343, 276, 258, 220 nm; (0.1N HCl): 343, 289, 212 nm. Maximum fluorescence (blue) between 265 and 390 nm at a pH between 5 and 8. Sol in water (0.3 mg/ml), hot ethanol, methanol, and pyridine. Practically insol in organic solvents not miscible with water.
Absorption maximum: uv max (0.1N NaOH): 343, 276, 258, 220 nm; (0.1N HCl): 343, 289, 212 nm
Status: This monograph has been retired and is no longer subject to revision or update.

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