from The Century Dictionary and Cyclopedia
- Noting an acid, 1.6-dihydroxyanthraquinone, C6H3OH-(CO)2C6H3OH. It is isomeric with alizarin, and crystallizes in yellow needles which melt above 330° C.
Sorry, no etymologies found.
Anthrapurpurin and flavopurpurin are obtained from two isomeric disulphanthraquinonic acids, improperly named isoanthraflavic and anthraflavic acids, which are converted into anthrapurpurin and flavopurpurin by a more profound action of potassa.