ASTM D8181 - 19

    Standard Specification for Microemulsion Blendstock for Preparing Microemulsion Test Fuel Oils

    Active Standard ASTM D8181 | Developed by Subcommittee: D02.E0

    Book of Standards Volume: 05.05


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    1. Scope

    1.1 This specification describes an alcohol-carboxylic acid blend, referred to as the microemulsion blendstock.

    1.1.1 Warning—The microemulsion blendstock should be stored in facilities and equipment designed for oxygenated and low flashpoint liquids.

    1.2 The microemulsion blendstock is to be blended with fuel oils to produce a microemulsion test fuel oil that consists of inverse micelles.

    Note 1: While no fuel standard currently exists for a microemulsion test fuel oil, work to develop one is underway.

    Note 2: Typical fuel oils that could be used for blending with microemulsion blendstock are fuels that comply with Specifications D975 and D396 and may contain up to 5 % by volume biodiesel.

    Note 3: Testing with test fuels containing 10 % microemulsion blendstock using B5 as a base fuel did not show any detrimental changes to specified fuel properties relative to B0 base fuels, but can impair measurement of microemulsion blendstock concentration.

    1.2.1 The microemulsion test fuel oil (to be made from this blendstock) is to be used for testing and demonstration purposes only in specific equipment and vehicles that are suited for or have been equipped with safety precautions for use with low flashpoint fuels and oxygenated fuels such as ethanol. Minimum safety precautions may include flame arrestors and grounding straps.

    Note 4: The low flash point of this blendstock relative to conventional diesel fuel increases certain hazards during storage and distribution.

    1.3 Nothing in this specification shall preclude observance of federal, state, or local regulations, which may be more restrictive.

    1.4 The values stated in SI units are to be regarded as standard. The values given in parentheses after SI units are provided for information only and are not considered standard.

    1.5 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.

    1.6 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.


    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

    D97 Test Method for Pour Point of Petroleum Products

    D130 Test Method for Corrosiveness to Copper from Petroleum Products by Copper Strip Test

    D396 Specification for Fuel Oils

    D445 Test Method for Kinematic Viscosity of Transparent and Opaque Liquids (and Calculation of Dynamic Viscosity)

    D664 Test Method for Acid Number of Petroleum Products by Potentiometric Titration

    D665 Test Method for Rust-Preventing Characteristics of Inhibited Mineral Oil in the Presence of Water

    D974 Test Method for Acid and Base Number by Color-Indicator Titration

    D975 Specification for Diesel Fuel Oils

    D3242 Test Method for Acidity in Aviation Turbine Fuel

    D4057 Practice for Manual Sampling of Petroleum and Petroleum Products

    D4175 Terminology Relating to Petroleum Products, Liquid Fuels, and Lubricants

    D4625 Test Method for Middle Distillate Fuel Storage Stability at 43C (110F)

    D4806 Specification for Denatured Fuel Ethanol for Blending with Gasolines for Use as Automotive Spark-Ignition Engine Fuel

    D6584 Test Method for Determination of Total Monoglycerides, Total Diglycerides, Total Triglycerides, and Free and Total Glycerin in B-100 Biodiesel Methyl Esters by Gas Chromatography

    D6751 Specification for Biodiesel Fuel Blend Stock (B100) for Middle Distillate Fuels

    D7042 Test Method for Dynamic Viscosity and Density of Liquids by Stabinger Viscometer (and the Calculation of Kinematic Viscosity)

    D7545 Test Method for Oxidation Stability of Middle Distillate FuelsRapid Small Scale Oxidation Test (RSSOT)

    D7862 Specification for Butanol for Blending with Gasoline for Use as Automotive Spark-Ignition Engine Fuel


    ICS Code

    ICS Number Code 75.160.20 (Liquid fuels)

    UNSPSC Code

    UNSPSC Code


    Referencing This Standard
    Link Here
    Link to Active (This link will always route to the current Active version of the standard.)

    DOI: 10.1520/D8181-19

    Citation Format

    ASTM D8181-19, Standard Specification for Microemulsion Blendstock for Preparing Microemulsion Test Fuel Oils, ASTM International, West Conshohocken, PA, 2019, www.astm.org

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