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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. 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 ...
Fuel pumps in Ireland, with green gas oil and red kerosene, and notices that it is an offence to use marked fuels in a motor vehicle. After August 2002, all European Union countries became obliged to add about 6 mg/L (0.034 oz/bbl) of Solvent Yellow 124, a dye with structure similar to Solvent Yellow 56, to heating fuel.
Oil Red O (Solvent Red 27, Sudan Red 5B, C.I. 26125, C 26 H 24 N 4 O) is a lysochrome (fat-soluble dye) diazo dye used for staining of neutral triglycerides and lipids on frozen sections and some lipoproteins on paraffin sections. It has the appearance of a red powder with an absorbance maximum at 518 nanometers. [1]
Oil Blue 35: Transparent blue 2N Solvent blue 35 61554 anthraquinone 17354-14-2: Oil Blue A: Unisol blue AS Solvent blue 36 61551 anthraquinone 14233-37-5: Oil Orange SS Orange OT Solvent Orange 2 12100 azo 2646-17-5: Oil Red O: Sudan red 5B Solvent red 27 26125 diazo 1320-06-5: Olsalazine (di)sodium Mordant yellow 5 14130 azo 15722-48-2 (acid ...
Oil Blue 35 [1] is a blue anthraquinone dye used for colouring alcoholic and hydrocarbon based solvents, including oils, fats, and waxes. It is used also in lacquers and inks. In some countries, it is used as a fuel dye. It is also used in some blue colored smoke formulations. In microscopy, it is used as a staining dye.
Sudan stains and Sudan dyes are synthetic organic compounds that are used as dyes for various plastics (plastic colorants) and are also used to stain sudanophilic biological samples, usually lipids. Sudan II , Sudan III , Sudan IV , Oil Red O , and Sudan Black B are important members of this class of compounds (see images below).