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).

CAS：518-83-2
中文别名：1,3-二?蒽醌;
英文别名：2,4-Dihydroxy-9,10-anthracenedione;9,10-Anthracenedione, 1,3-dihydroxy-;PURPUROXANTHIN;1,3-DIHYDROXYANTHRAQUINONE;1,3-dihydroxy-9,10-anthraquinone;1,3-dihydroxyanthracene-9,10-dione;1,3-Dihydroxy-9,10-anthracenedione;
分子式：C14H8O4
分子量：240.211
精确质量：240.042
Psa：74.6
Logp：1.8732

UNII：9RBB2G1GQB

密度：1.54 g/cm3
沸点：514.5ºC at 760 mmHg
闪点：279ºC
折射率：1.732

海关编码：2914690090