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.

Solvent Red 26
Names
Other names
Oil Red EGN, Benzidine Yellow 10G, Sanyo Pigment Yellow 8105
Identifiers
3D model (JSmol)
ChEMBL
ChemSpider
ECHA InfoCard 100.022.508
EC Number
  • 224-757-3
  • InChI=1S/C25H22N4O/c1-16-8-4-7-11-21(16)26-27-22-14-18(3)23(15-17(22)2)28-29-25-20-10-6-5-9-19(20)12-13-24(25)30/h4-15,30H,1-3H3
    Key: NRBKWAQSLYBVSG-UHFFFAOYSA-N
  • Oc2ccc1ccccc1c2N=Nc3cc(C)c(N=Nc4ccccc4C)cc3C
Properties
C25H22N4O
Molar mass 394.478 g·mol−1
Appearance Red solid
Low
Hazards
GHS labelling:
Warning
H315, H317, H319, H335, H341, H351
P201, P202, P261, P264, P271, P272, P280, P281, P302+P352, P304+P340, P305+P351+P338, P308+P313, P312, P321, P332+P313, P333+P313, P337+P313, P362, P363, P403+P233, P405, P501
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

References
  1. http://www.chevron.com/products/prodserv/fuels/bulletin/diesel/L2_3_9_rf.htm Archived May 10, 2005, at the Wayback Machine
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