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Dichlorofluorescein

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Dichlorofluorescein
Names
IUPAC name 2',7'-dichloro-3',6'-dihydroxy-3H-spiro-3-one
Identifiers
3D model (JSmol)
ChEBI
ChemSpider
ECHA InfoCard 100.000.881 Edit this at Wikidata
PubChem CID
CompTox Dashboard (EPA)
InChI
  • InChI=1S/C20H10Cl2O5/c21-13-5-11-17(7-15(13)23)26-18-8-16(24)14(22)6-12(18)20(11)10-4-2-1-3-9(10)19(25)27-20/h1-8,23-24HKey: VFNKZQNIXUFLBC-UHFFFAOYSA-N
  • InChI=1/C20H10Cl2O5/c21-13-5-11-17(7-15(13)23)26-18-8-16(24)14(22)6-12(18)20(11)10-4-2-1-3-9(10)19(25)27-20/h1-8,23-24HKey: VFNKZQNIXUFLBC-UHFFFAOYAO
  • InChI=1S/C20H10Cl2O5/c21-13-5-11-17(7-15(13)23)26-18-8-16(24)14(22)6-12(18)20(11)10-4-2-1-3-9(10)19(25)27-20/h1-8,23-24HKey: VFNKZQNIXUFLBC-UHFFFAOYSA-N
SMILES
  • Clc5cc4c(Oc1cc(O)c(Cl)cc1C34OC(=O)c2c3cccc2)cc5O
Properties
Chemical formula C20H10Cl2O5
Molar mass 401.20 g·mol
Except where otherwise noted, data are given for materials in their standard state (at 25 °C , 100 kPa). Infobox references
Chemical compound

Dichlorofluorescein is an organic dye of the fluorescein family, being substituted at the 2 and 7 positions by chloride. It is used as an indicator for argentometry by Fajans method.

References

  1. Kolthoff, I. M.; Lauer, W. M.; Sunde, C. J. (1929). "The Use of Dichlorofluorescein as an Adsorption Indicator for the Argentometric Titration of Chlorides". Journal of the American Chemical Society. 51 (11): 3273. doi:10.1021/ja01386a014.
  2. Bambach, Karl; Rider, T. H. (1935). "Volumetric Determinations of Halides: Use of Dichlorofluorescein as an Adsorption Indicator". Industrial & Engineering Chemistry Analytical Edition. 7 (3): 165. doi:10.1021/ac50095a012.
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