ASTM D1177 - 12

    Standard Test Method for Freezing Point of Aqueous Engine Coolants

    Active Standard ASTM D1177 | Developed by Subcommittee: D15.03

    Book of Standards Volume: 15.05


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    Significance and Use

    5.1 The freezing point of an engine coolant indicates the coolant freeze protection.

    5.2 The freezing point of an engine coolant may be used to determine the approximate glycol content, provided the glycol type is known.

    1. Scope

    1.1 This test method covers the determination of the freezing point of an aqueous engine coolant solution in the laboratory.

    Note 1Where solutions of specific concentrations are to be tested, they shall be prepared from representative samples as directed in Practice D1176. Secondary phases separating on dilution need not be separated.

    Note 2These products may also be marketed in a ready-to-use form (prediluted).

    1.2 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.

    1.3  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

    D1176 Practice for Sampling and Preparing Aqueous Solutions of Engine Coolants or Antirusts for Testing Purposes

    E1 Specification for ASTM Liquid-in-Glass Thermometers


    ICS Code

    ICS Number Code 71.100.45 (Refrigerants and antifreezes)

    UNSPSC Code

    UNSPSC Code


    DOI: 10.1520/D1177-12

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