ASTM D1093 - 11

    Standard Test Method for Acidity of Hydrocarbon Liquids and Their Distillation Residues

    Active Standard ASTM D1093 | Developed by Subcommittee: D02.06

    Book of Standards Volume: 05.01


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    Significance and Use

    Some petroleum products are treated with mineral acid as part of the refining procedure. Obviously, any residual mineral acid in a petroleum product is undesirable. The absence of a positive indication in the test for acidity of the distillation residue or aqueous extract of a hydrocarbon liquid is an assurance of the care used in refining the fuel or solvent.

    1. Scope

    1.1 This test method covers the qualitative determination of the acidity of hydrocarbon liquids and their distillation residues. (WarningMany hydrocarbon liquids are extremely flammable. Harmful if inhaled. Hydrocarbon liquid vapors can cause a flash fire.)

    1.2 If desired to determine the basicity of a hydrocarbon liquid, proceed in accordance with 9.2 or 9.3, but substitute 3 drops of phenolphthalein indicator solution for the methyl orange indicator. A pink or red color in the aqueous solution when phenolphthalein is used indicates basicity.

    1.3 The results obtained by this test method are qualitative expressions. However, for the preparation of reagents and in the procedure, acceptable SI units are to be regarded as the standard.

    1.4 This standard does not purport to address all of the safety problems, 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

    D86 Test Method for Distillation of Petroleum Products at Atmospheric Pressure

    D91 Test Method for Precipitation Number of Lubricating Oils

    D850 Test Method for Distillation of Industrial Aromatic Hydrocarbons and Related Materials

    D1078 Test Method for Distillation Range of Volatile Organic Liquids

    D1193 Specification for Reagent Water

    D4057 Practice for Manual Sampling of Petroleum and Petroleum Products

    D4177 Practice for Automatic Sampling of Petroleum and Petroleum Products


    ICS Code

    ICS Number Code 75.080 (Petroleum products in general)

    UNSPSC Code

    UNSPSC Code 15101500(Petroleum and distillates)


    Referencing This Standard

    DOI: 10.1520/D1093-11

    ASTM International is a member of CrossRef.

    Citation Format

    ASTM D1093-11, Standard Test Method for Acidity of Hydrocarbon Liquids and Their Distillation Residues, ASTM International, West Conshohocken, PA, 2011, www.astm.org

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