Solvent Red 26
Solvent Red 26, also known as Oil Red EGN or C.I. 26120, is a purplish red synthetic azo dye. It is soluble in oils and insoluble in water.
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| Names | |
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| Other names
Oil Red EGN, Benzidine Yellow 10G, Sanyo Pigment Yellow 8105 | |
| Identifiers | |
3D model (JSmol) |
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| ECHA InfoCard | 100.022.508 |
CompTox Dashboard (EPA) |
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| Properties | |
| C25H22N4O | |
| Molar mass | 394.478 g·mol−1 |
| Appearance | Red solid |
| Low | |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). | |
| Infobox references | |
Its main use is as a standard fuel dye in the US mandated by the US IRS to distinguish low-taxed or tax exempt heating oil from automotive diesel fuel, and by the EPA to mark fuels with higher sulfur content; it is however increasingly replaced with Solvent Red 164, a similar dye with longer alkyl chains, which is better soluble in hydrocarbons. [1] The concentration required by IRS is a spectral equivalent of 3.9 pounds per 1000 barrels, or 11.13 mg/l, of Solvent Red 26 in solid form; the concentrations required by EPA are roughly 5 times lower.
See also
- Solvent Red 27
- Solvent Red 164
References
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