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Not to be confused with fluorene, fluorenone, or fluorine.
Skeletal formula
Ball-and-stick model
CAS number 494-41-7
PubChem 11333049
ChemSpider 9507995 YesY
Jmol-3D images Image 1
Molecular formula C13H8O2
Molar mass 196.20 g mol−1
Except where noted otherwise, data are given for materials in their standard state (at 25 °C (77 °F), 100 kPa)
 YesY (verify) (what is: YesY/N?)
Infobox references

Fluorone is a heterocyclic chemical compound. It forms the core structure for various chemicals, most notably fluorone dyes,[1] including fluorescein, erythrosine and rhodamine. It is an isomer of xanthone, sometimes referred to as an isoxanthone.

Chemical structure of erythrosine


  1. ^ Shi, Jianmin; Zhang, Xianping; Neckers, Douglas C (1992). "Xanthenes: fluorone derivatives". Journal of Organic Chemistry 57 (16): 4418–4421. doi:10.1021/jo00042a020.