Indanthrene blue RS
| Indanthrene blue RS | |
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Other names
C.I. vat blue 4, carbon paper blue, blue O, carbanthrene blue 2R, fenan blue RSN, graphtol blue RL, medium blue, monolite fast blue 3R, indanthrene, indanthrone, pigment blue 60, C.I. 69800 |
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| Identifiers | |
| CAS number | 81-77-6  |
| PubChem | 6690 |
| ChemSpider | 6435 |
| Beilstein Reference | 367131 |
| Jmol-3D images | Image 1 |
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| Properties | |
| Molecular formula | C28H14N2O4 |
| Molar mass | 442.42 g mol−1 |
| Density | 1.6 g/ml |
| Solubility in water | Insoluble |
 (verify) (what is:  / ?)Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa) |
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| Infobox references | |
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This article does not cite any references or sources. Please help improve this article by adding citations to reliable sources. Unsourced material may be challenged and removed. (December 2009) |
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It has been suggested that this article or section be merged with Indanthrone blue. (Discuss) Proposed since February 2009. |
Indanthrene blue RS is a synthetic anthraquinone dye. It has the appearance of blue needles with metallic lustre and melting point of 470-500 °C. It is known by a host of other names, see right.
When used as a food dye, it has E number E130.
Indanthrene Blue RS was patented in 1901 by Rene Bohn as the first anthraquinone vat dye, one of the dyes with very good fastness to light and washing. It is used to dye unmordanted cotton and as a pigment in quality paints and enamels.
