Pigment violet 23

Pigment violet 23

Names
Other names 9,19-Dichloro-5,15-diethyl-5,15-dihydrodiindolo[2,3-c:2',3'-n]triphenodioxazine, C.I. 51319, Carbazole Dioxazine Violet
Identifiers
CAS Number	215247-95-3
3D model (JSmol)	Interactive image
EC Number	606-790-9
PubChem CID	20813033
InChI InChI=1S/C34H22Cl2N4O2/c1-3-39-19-11-7-5-9-17(19)25-21(39)13-15-23-29(25)37-31-27(35)34-32(28(36)33(31)41-23)38-30-24(42-34)16-14-22-26(30)18-10-6-8-12-20(18)40(22)4-2/h5-16H,3-4H2,1-2H3 Key: GBNIRCSJWYOIHL-UHFFFAOYSA-N
SMILES c1cc2N(CC)c3ccc4N=c5c(Cl)c6Oc7c8c9ccccc9N(CC)c8ccc7N=c6c(Cl)c5Oc4c3c2cc1
Properties
Chemical formula	C34H22Cl2N4O2
Molar mass	589.48
Appearance	dark purple solid
Melting point	385 ºC
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 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 amino with chloranil.