ASTM WK35559

    Work Item: ASTM WK35559 - Revision of D7304 - 06 Standard Test Method for Determination of Denatonium Ion in Engine Coolant by HPLC

    (What is a Work Item?)

    Active Standard: D7304 - 06

    Developed by Subcommittee: D15.04 | Committee D15 | Contact Staff Manager

    1. Rationale

    Stop sell orders have been placed on commercial coolants due to regulatory findings that concentrations of denatonium benzoate (DNB) are too low. Issues with ASTM D7304 have been debated and an improved method proposed. The new method is now in the process of interlaboratory study (ILS) and ballot.


    analytical method; antifreeze; Bitterant; chromatography; denatonium ion; denatonium benzoate; engine coolant; HPLC;
    Citing ASTM Standards
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    Work Item Status

    Date Initiated:

    Technical Contact:
    Edward Eaton, Sr.


    D15 (13-05)

    Ballot Item Approved as D7304-2014 and Pending Publication