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  2. Universal indicator - Wikipedia

    en.wikipedia.org/wiki/Universal_indicator

    A roll of universal indicator paper Colors of universal indicator. A universal indicator is a pH indicator made of a solution of several compounds that exhibit various smooth colour changes over a wide range pH values to indicate the acidity or alkalinity of solutions. A universal indicator can be in paper form or present in a form of a ...

  3. Solvent Red 26 - Wikipedia

    en.wikipedia.org/wiki/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. 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 ...

  4. Polyacrylamide gel electrophoresis - Wikipedia

    en.wikipedia.org/wiki/Polyacrylamide_gel...

    Polyacrylamide gel (PAG) had been known as a potential embedding medium for sectioning tissues as early as 1964, and two independent groups employed PAG in electrophoresis in 1959. [ 17 ] [ 18 ] It possesses several electrophoretically desirable features that make it a versatile medium.

  5. pH indicator - Wikipedia

    en.wikipedia.org/wiki/PH_indicator

    Sometimes, a blend of different indicators is used to achieve several smooth color changes over a wide range of pH values. These commercial indicators (e.g., universal indicator and Hydrion papers) are used when only rough knowledge of pH is necessary. For a titration, the difference between the true endpoint and the indicated endpoint is ...

  6. List of dyes - Wikipedia

    en.wikipedia.org/wiki/List_of_dyes

    Oil red EGN Solvent red 26 26120 diazo 4477-79-6: Solvent Violet 13: Oil violet 401 D&C Violet No.2 Solvent violet 13 Disperse blue 72 60725 anthraquinone 81-48-1: Solvent Yellow 56: Euromarker Sudan 455 Solvent yellow 56 11021 azo 2481-94-9: Solvent Yellow 124: Euromarker SY 124 Solvent yellow 124 111155 azo 34432-92-3: Spirit blue: Opal blue ...

  7. Oil Red O - Wikipedia

    en.wikipedia.org/wiki/Oil_Red_O

    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]

  8. Honeywell UOP - Wikipedia

    en.wikipedia.org/wiki/Honeywell_UOP

    A Honeywell refinery producing green diesel from natural oils in Pasadena, Texas.. The UOP Riverside research and development laboratory in McCook, Illinois was conceived in 1921 by Hiram J. Halle, the chief executive officer of Universal Oil Products (now simply UOP), as a focal point where the best and brightest scientists could create new products and provide scientific support for the oil ...

  9. Fuel dye - Wikipedia

    en.wikipedia.org/wiki/Fuel_dye

    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.