Solvent Red 26

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Solvent Red 26
Solvent Red 26.png
Identifiers
CAS number 4477-79-6
Jmol-3D images Image 1
Properties
Molecular formula C25H22N4O
Molar mass 394.47 g mol−1
Appearance Red solid
Solubility in water Low
Except where noted otherwise, data are given for materials in their standard state (at 25 °C (77 °F), 100 kPa)
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. [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[edit]

References[edit]

  1. ^ http://www.chevron.com/products/prodserv/fuels/bulletin/diesel/L2_3_9_rf.htm[dead link]