Title: Rufigallol
CAS Registry Number: 82-12-2
CAS Name: 1,2,3,5,6,7-Hexahydroxy-9,10-anthracenedione
Additional Names: 1,2,3,5,6,7-hexahydroxyanthraquinone; rufigallic acid; C.I. 58600
Molecular Formula: C14H8O8
Molecular Weight: 304.21
Percent Composition: C 55.27%, H 2.65%, O 42.07%
Literature References: Prepd by the action of H2SO4 on gallic acid: Robiquet, Ann. 19, 204 (1836); by dry distn of gallic acid: Kunz-Krause, Manicke, Ber. 53, 190 (1920). See also: Colour Index vol. 4 (3rd ed., 1971) p 4520.
Properties: Red needles. Does not melt, but sublimes with partial decompn upon heating. Absorption spectrum: Treibs, Steinmetz, Ann. 506, 171, 191 (1933). Practically insol in water. Freely sol in acetone; slightly sol in alcohol, ether, with yellow color. Sol in alkali hydroxide solns with violet color, but is soon dec by oxidation.
Derivative Type: Hexamethyl ether
Molecular Formula: C20H20O8
Molecular Weight: 388.37
Percent Composition: C 61.85%, H 5.19%, O 32.96%
Properties: Yellow needles, mp 240°.
Melting point: mp 240°
Use: For color reactions with Zr and Hf. |