Standard Active Last Updated: Sep 16, 2022 Track Document
ASTM D1177-22

Standard Test Method for Freezing Point of Aqueous Engine Coolants

Standard Test Method for Freezing Point of Aqueous Engine Coolants D1177-22 ASTM|D1177-22|en-US Standard Test Method for Freezing Point of Aqueous Engine Coolants Standard new BOS Vol. 15.05 Committee D15
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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 or glycerin content, provided the glycol type is known.


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

Note 1: Where 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 2: These 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 standard. The values given in parentheses after SI units are provided for information only and are not considered standard.

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

1.4 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.

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Book of Standards Volume: 15.05
Developed by Subcommittee: D15.03
Pages: 4
DOI: 10.1520/D1177-22
ICS Code: 71.100.45