ASTM D1120 standard test method for boiling point of engine coolants
1. Scope
1.1 This test method covers the determination of the equilibrium boiling point of engine coolants. The equilibrium boiling point indicates the temperature at which the sample will start to boil in a cooling system under equilibrium conditions at atmospheric pressure.

NOTE 1 - Engine coolants may also be marketed in a ready-to-use form (prediluted). This test procedure is applicable to diluted solutions as well as to concentrates.

NOTE 2 - The procedure for obtaining a representative test sample of a coolant solution that contains an antileak additive is found in Test Method D1176.

1.2 The values stated in SI units are to be regarded as 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
2.1 ASTM Standards:
D1176 Test Method for Sampling and Preparing Aqueous Solutions of Engine Coolants or Antirusts for Testing Purposes
E 1 Specification for ASTM Thermometers

3. Summary of Test Method
3.1 Sixty millilitres (two ounces) of the sample are boiled under equilibrium conditions at atmospheric pressure in a 100-mL flask. The temperature of the liquid corrected for barometric pressure is the boiling point.