1,3-Dihydroxyanthraquinone or purpuroxanthin 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 molecule can be viewed as deriving from anthraquinone by replacement of two hydrogen atoms (H) by hydroxyl groups (-OH).
Properties
It 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).[2]
See also
- alizarin (1,2-dihydroxyanthraquinone)
References
- ^ a b Padma S. Vankar, Rakhi Shanker, Debajit Mahanta and S.C. Tiwari (2008), Ecofriendly sonicator dyeing of cotton with Rubia cordifolia Linn. using biomordant. Dyes and Pigments, Volume 76, Issue 1, Pages 207-212. doi:10.1016/j.dyepig.2006.08.023
- ^ Hugh Alister McGuigan (1921), An introduction to chemical pharmacology; pharmacodynamics in relation to chemistry. P. Blakiston's son, Philadelphia. Online version at archive.org, accessed on 2010-01-30.