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Chemical compound From Wikipedia, the free encyclopedia
1,3-Dihydroxyanthraquinone, also called purpuroxanthin or xanthopurpurin, is an organic compound with formula C
14H
8O
4 that occurs in the plant Rubia cordifolia (Indian madder).[1] It is one of ten dihydroxyanthraquinone isomers. Its molecular structure can be viewed as being derived from anthraquinone by replacement of two hydrogen atoms (H) by hydroxyl groups (-OH).
Names | |
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Preferred IUPAC name
1,3-Dihydroxyanthracene-9,10-dione | |
Other names
Purpuroxanthin; Xanthopurpurin | |
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Properties | |
C14H8O4 | |
Molar mass | 240.21 g/mol |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Xanthopurpurin occurs in small amounts (as a glycoside) in the root of the common madder plant, Rubia tinctorum, together with alizarin, purpurin and other anthraquinone derivatives.[2]
Xanthopurpurin is insoluble in hexane but soluble in chloroform. It can be obtained from solutions in the latter as reddish crystals that melt at 270–273 °C.[1]
Like many dihydroxy- and trihydroxyanthraquinones, it has a purgative action, although only 1/6 as effective as 1,2,7-trihidroxyanthraquinone (anthrapurpurin).[3]
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