Xanthene

  • 9H- xanthene
  • Dibenzopyrane
  • 10H -9- Oxaanthracen

Yellowish leaves

Fixed

100 ° C.

310-312 ° C

  • Insoluble in water, poor in ethanol
  • Soluble in diethyl ether, chloroform, acetic acid, benzene, ligroin and

Attention

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Xanthene (gr. " xanthos " = yellow) is a tricyclic ether and thus a heterocyclic compound. The xanthene dyes, such as rhodamine, fluorescein, and eosin B and eosin Y, have the basic structure of xanthene.

Properties, display and use

Xanthene crystallizes in yellowish leaves, which dissolve readily in nonpolar solvents such as benzene, diethyl ether and chloroform, poorly in ethanol and in water. Carried out the synthesis of the xanthene, xanthone, by catalytic hydrogenation or by distillation with zinc dust. When oxidation occurs again in reversing the synthesis of xanthone. Xanthene is used in organic synthesis as well as a fungicide. In Germany, Austria and Switzerland is not approved as a pesticide.

CAS registry number PubChem Dangerous Substances Directive (67/548/EEC)
830724
de