Fluoran

Fluoran
Names
	IUPAC name Spiro[2-benzofuran-3,9'-xanthene]-1-one
Identifiers
CAS Number	596-24-7 ;
3D model (JSmol)	Interactive image;
ChEBI	CHEBI:37915 ;
ChemSpider	62216 ;
ECHA InfoCard	100.008.984
PubChem CID	68994;
UNII	C8A6LHH76W ;
CompTox Dashboard (EPA)	DTXSID50208276 ;
	InChI InChI=1S/C20H12O3/c21-19-13-7-1-2-8-14(13)20(23-19)15-9-3-5-11-17(15)22-18-12-6-4-10-16(18)20/h1-12H Key: FWQHNLCNFPYBCA-UHFFFAOYSA-N ; InChI=1/C20H12O3/c21-19-13-7-1-2-8-14(13)20(23-19)15-9-3-5-11-17(15)22-18-12-6-4-10-16(18)20/h1-12H Key: FWQHNLCNFPYBCA-UHFFFAOYAD;
	SMILES O=C2OC4(c1ccccc12)c5ccccc5Oc3ccccc34;
Properties
Chemical formula	C20H12O3
Molar mass	300.31
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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	Infobox references

Fluoran is a triarylmethane dye. It is the structural core of a variety of other dyes.[1]

These dyes have a variety of applications such as chemical stains (for example eosins) and in thermal paper. Black 305 is a common leuco dye product for thermal paper.[2]

The chemical structure of eosin, a fluoran-based dye

References

Hatano, Y. "The chemistry of fluoran leuco dyes" in Chemistry and Applications of Leuco Dyes, Ed. R. Muthyala, Plenum Press 1997
"BLACK 305". Nagase America. Nagase America Corporation. Retrieved 24 August 2019.

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[1] Hatano, Y. "The chemistry of fluoran leuco dyes" in Chemistry and Applications of Leuco Dyes, Ed. R. Muthyala, Plenum Press 1997

[2] "BLACK 305". Nagase America. Nagase America Corporation. Retrieved 24 August 2019.