Hydroxyanthraquinone
In organic chemistry hydroxyanthraquinones refers to compounds with the formula C12H8−nn2 where n ≥ 1. Almost all hydroxyanthraquinones are derivative of 9,10-anthraquinone.Isomers
One peculiarity of the hydroxyanthraquinones is the relative obscurity of the monohydroxy derivatives. Most hydroxyanthraquinones have two or more hydroxy groups.Dihydroxy
s have the formula. The dyes alizarin and quinizarin are prominent examples.Trihydroxy
s have the formula. 1,2,4-Trihydroxyanthraquinone, commonly called purpurin, is a naturally occurring red/yellow dye.Tetrahydroxy
s have the formula. The dye quinalizarin (1,2,5,8-tetrahydroxyanthraquinone is one example.Hexahydroxy
s have the formula.1,2,3,5,6,7-hexahydroxy-9,10-anthraquinone occurs in nature.