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rufigallic
rufigallic adj.
Brit. 
/ˌruːfɪˈɡalɪk/
, /ˌruːfɪˈɡalɪk/U.S. /ˌrufəˈɡælɪk/
[apparently < rufi- comb. form + gallic adj.2, after French acide rufigallique (1849 or earlier) or German Rufigallussäure (1855 or earlier)] rufigallic acid n. a weakly acidic red crystalline substance obtained by heating gallic acid with acids.Systematic name: 1,2,3,5,6,7-hexahydroxyanthraquinone; C14H8O8./ˌrufəˈɡælɪk/ΚΠ
1856 W. Gregory Handbk. Org. Chem. (ed. 4) 326 When dissolved in hot oil of vitriol, and precipitated from the cold solution by water, gallic acid is obtained in a peculiar form, called rufigallic acid, which is C14H4O8.
1870 Nature 11 Aug. 308/1 Gallic acid..when heated with sulphuric acid, yields rufigallic acid, until now considered as C7H4O4.
1955 Biochem. Jrnl. 59 479/1 Rufigallic acid and asperthecin decompose very rapidly in strongly alkaline solution.
2004 U.S. Patent 2004/0202930 5/2 Rufigallic acid is prepared according to the method of Robiquet..by condensing gallic acid in the concentrated sulfuric acid.
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