Solvent Red 26
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| Names | |
|---|---|
| Other names
Benzidine Yellow 10G, Sanyo Pigment Yellow 8105
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| Identifiers | |
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3D model (JSmol)
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| ECHA InfoCard | 100.022.508 |
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| Properties | |
| C25H22N4O | |
| Molar mass | 394.48 g·mol−1 |
| Appearance | Red solid |
| Low | |
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Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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| Infobox references | |
Solvent Red 26, also known as C.I. 26120, is a purplish red synthetic azo dye. It is soluble in oils and insoluble in water.
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. 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.
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