Article · Wikipedia archive · Last revised Jun 22, 2026

Fluorone

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

Last revised
Jun 22, 2026
Read time
≈ 1 min
Length
146 w
Citations
1
Source
Wikipedia ↗
Fluorone
Skeletal formula
source ↗
Ball-and-stick model
source ↗
Names
Preferred IUPAC name
3H-Xanthen-3-one
Other names
3-Isoxanthone; 3-Oxo-3H-xanthene
Identifiers
3D model (JSmol)
ChemSpider
UNII
  • InChI=1S/C13H8O2/c14-11-6-5-10-7-9-3-1-2-4-12(9)15-13(10)8-11/h1-8H checkY
    Key: FRIPRWYKBIOZJU-UHFFFAOYSA-N checkY
  • InChI=1/C13H8O2/c14-11-6-5-10-7-9-3-1-2-4-12(9)15-13(10)8-11/h1-8H
    Key: FRIPRWYKBIOZJU-UHFFFAOYAE
  • O=C1C=CC2=Cc3ccccc3OC2=C1
Properties
C13H8O2
Molar mass 196.205 g·mol−1
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
checkY verify (what is checkY☒N ?)

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 source ↗
See also

See also

References

References

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