A yellow crystalline organic compound, C13 H10 O, that is soluble in ether and is used as a fungicide and in organic synthesis. The structural unit of xanthene is a feature in several fluorescent dyes.
A ring system, C6H4CH2OC6H4, occurring as yellowish, crystalline leaflets in the molecules of many dyes.
It is obtained by the oxidation of xanthene (methylene diphenylene oxide) with chromic acid; by the action of phosphorus oxychloride on disodium salicylate; by heating 2 2'-dioxybenzophenone with concentrated sulphuric acid; by distilling fluoran with lime; by the oxidation of xanthydrol (R.
OH, whilst a strong reducing agent like hydriodic acid converts it into xanthene, the group >CO becoming > CH.
Xanthene, C13H100, may be synthesized by condensing phenol with ortho-cresol in the presence of aluminium chloride.