ASTM D6258 - 09(2014)

    Standard Test Method for Determination of Solvent Red 164 Dye Concentration in Diesel Fuels

    Active Standard ASTM D6258 | Developed by Subcommittee: D02.05

    Book of Standards Volume: 05.03


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    Significance and Use

    5.1 This test method was developed to provide for the enforcement of 26 CFR 48.4082-1(b), which mandates that all tax-exempt diesel fuels be dyed with an amount of Solvent Red 164 at a concentration that is spectrally equivalent to 3.9 lb/103 bbl (11.1 mg/L) of Solvent Red 26. It is employed to verify that the correct amount of Solvent Red 164 is being added to tax-exempt product at terminals or refineries prior to sale, and to detect the presence of Solvent Red 164 in taxed product intended for on-road use.

    5.1.1 Solvent Red 26 is the azo dye shown in Fig. 1. It is the standard against which the concentration of Solvent Red 164 is measured because it is available in a certified pure form. Solvent Red 164 is identical in structure to Solvent Red 26 except that it has hydrocarbon (alkyl) chains incorporated to increase its solubility in diesel and burner fuels. The exact composition of Solvent Red 164 will vary from manufacturer to manufacturer and lot to lot depending upon the extent of alkylation that occurs during production; however, its visible spectrum is virtually identical to the spectrum of Solvent Red 26. Solvent Red 164 is employed in the field (instead of Solvent Red 26) to dye tax-exempt diesel and burner fuels because of its higher solubility and relatively low cost.

    1. Scope

    1.1 This test method covers the procedure for determining the concentration of dye Solvent Red 164 in commercially available diesel and burner fuels using visible spectroscopy.

    Note 1: This test method is suitable for all No. 1 and No. 2 grades in Specifications D396 and D975 and for grades DMA and DMB in Specification D2069.

    1.2 The concentration ranges specified for the calibration standards are established in response to the Internal Revenue Service dyeing requirements which state that tax-exempt diesel fuel satisfies the dyeing requirement only if it contains the dye Solvent Red 164 (and no other dye) at a concentration spectrally equivalent to 3.9 lb of the solid dye standard Solvent Red 26 per thousand bbl (11.1 mg/L) of diesel fuel.

    1.3 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.

    1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.


    2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.

    ASTM Standards

    D396 Specification for Fuel Oils

    D975 Specification for Diesel Fuel Oils

    D2069 Specification for Marine Fuels

    D3699 Specification for Kerosine

    D4057 Practice for Manual Sampling of Petroleum and Petroleum Products

    E131 Terminology Relating to Molecular Spectroscopy

    E169 Practices for General Techniques of Ultraviolet-Visible Quantitative Analysis

    E275 Practice for Describing and Measuring Performance of Ultraviolet and Visible Spectrophotometers

    E288 Specification for Laboratory Glass Volumetric Flasks

    E691 Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method

    E969 Specification for Glass Volumetric (Transfer) Pipets

    Federal Regulation

    26CFR48.4082-1(b) Federal Excise Tax Regulation


    ICS Code

    ICS Number Code 75.160.20 (Liquid fuels)

    UNSPSC Code

    UNSPSC Code 15101505(Diesel fuel)


    Referencing This Standard

    DOI: 10.1520/D6258-09R14

    ASTM International is a member of CrossRef.

    Citation Format

    ASTM D6258-09(2014), Standard Test Method for Determination of Solvent Red 164 Dye Concentration in Diesel Fuels, ASTM International, West Conshohocken, PA, 2014, www.astm.org

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