1,3-Dihydroxyanthraquinone

1,3-Dihydroxyanthraquinone
Names
	Preferred IUPAC name 1,3-Dihydroxyanthracene-9,10-dione
	Other names Purpuroxanthin; Xanthopurpurin
Identifiers
CAS Number	518-83-2 ;
3D model (JSmol)	Interactive image;
ChEBI	CHEBI:37502 ;
ChEMBL	ChEMBL372711 ;
ChemSpider	170598 ;
PubChem CID	196978;
UNII	9RBB2G1GQB ;
CompTox Dashboard (EPA)	DTXSID6075431 ;
	InChI InChI=1S/C14H8O4/c15-7-5-10-12(11(16)6-7)14(18)9-4-2-1-3-8(9)13(10)17/h1-6,15-16H Key: WPWWKBNOXTZDQJ-UHFFFAOYSA-N ; InChI=1/C14H8O4/c15-7-5-10-12(11(16)6-7)14(18)9-4-2-1-3-8(9)13(10)17/h1-6,15-16H Key: WPWWKBNOXTZDQJ-UHFFFAOYAR;
	SMILES O=C2c1ccccc1C(=O)c3c2cc(O)cc3O;
Properties
Chemical formula	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). verify (what is ?) Infobox references

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). 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).

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.