Hydroxyanthraquinone

In organic chemistry hydroxyanthraquinones refers to compounds with the formula C12H8−n(OH)n(CO)2 where n ≥ 1.

[3][4][5] One peculiarity of the hydroxyanthraquinones is the relative obscurity of the monohydroxy derivatives.

The dyes alizarin (1,2-Dihydroxyanthraquinone) and quinizarin are prominent examples.

1,2,4-Trihydroxyanthraquinone, commonly called purpurin, is a naturally occurring red/yellow dye.

Dihydroxyanthraquinones have the formula C12H2(OH)6(CO)2.1,2,3,5,6,7-hexahydroxy-9,10-anthraquinone (rufigallol) occurs in nature.

1,4-Dihydroxyanthraquinone, commonly called quinizarin is a common hydroxyanthroquinone. [ 1 ] [ 2 ]