Alizarin cyanine R
From Wikipedia, the free encyclopedia
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| Names | |
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| IUPAC name
1,2,4,5,7,8-Hexahydroxyanthraquinone | |
Other names
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| Identifiers | |
3D model (JSmol) |
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| ChemSpider | |
PubChem CID |
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| UNII | |
CompTox Dashboard (EPA) |
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| Properties | |
| C14H8O8 | |
| Molar mass | 304.022 g·mol−1 |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Alizarin cyanine R is an anthraquinone dye and belongs to the mordant dyes[1]
Alizarin cyanine R was discovered by R. E. Schmidt in 1891.[1]
Representation
Alizarin cyanine R can be obtained by oxidation of alizarin Bordeaux with manganese dioxide, analogous to the oxidation of alizarin to purpurin.[2]
Another route involves Chinalizarin (C.I. 58500), which is treated with manganese dioxide in sulfuric acid, followed by oxidation of the resulting quinone and subsequent reduction (chemistry) with sulfurous acid.[1]
A further possibility is the oxidation of anthrapurpurin (C.I. 58255) with Oleum.[1]
