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Other names 9,19-Dichloro-5,15-diethyl-5,15-dihydrodiindolotriphenodioxazine, C.I. 51319, Carbazole Dioxazine Violet | |
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CAS Number | |
3D model (JSmol) | |
ECHA InfoCard | 100.108.962 |
EC Number |
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CompTox Dashboard (EPA) | |
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Properties | |
Chemical formula | C34H22Cl2N4O2 |
Molar mass | 589.48 |
Appearance | dark purple solid |
Melting point | 385 °C |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C , 100 kPa). Infobox references |
Pigment violet 23 is an organic compound that is a commercial pigment. It is member of the dioxazine family of heterocyclic compounds, but derived from carbazoles. It is prepared by condensation of chloranil and 3-amino-N-ethylcarbazole. It has a centrosymmetric angular structure. For many years, the structure was assigned, incorrectly, as having a "linear structure" (EC no. 228-767-9, CAS RN 6358-30-1) which differ in terms of the carbazole ring fusion.
Pigment violet 23 is prepared by condensation of an aniline with chloranil.
References
- Chamberlain, Terence "Dioxazine violet pigments" from High Performance Pigments Edited by Smith, Hugh M. 2002, 185–194. doi:10.1002/3527600493.ch12
- Panina, N.; van de Ven, R.; Verwer, P.; Meekes, H.; Vlieg, E.; Deroover, G. "Polymorph prediction of organic pigments" Dyes and Pigments 2008, volume 79, 183–192.
- Heinrich Zollinger (2003). Color Chemistry Syntheses, Properties, and Applications of Organic Dyes and Pigments. John Wiley & Sons. p. 118. ISBN 3-906390-23-3.
- Horst Tappe, Walter Helmling, Peter Mischke, Karl Rebsamen, Uwe Reiher, Werner Russ, Ludwig Schläfer and Petra Vermehren "Reactive Dyes"in Ullmann's Encyclopedia of Industrial Chemistry 2000, Wiley-VCH, Weinheim. doi:10.1002/14356007.a22_651