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Physical & Chemical properties

Melting point / freezing point

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Reference
Endpoint:
melting point/freezing point
Type of information:
experimental study
Adequacy of study:
key study
Study period:
2018
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to
Guideline:
other: SH/T 0090-1991 “Test Method for Freezing Point of Aqueous Engine Coolants”
Version / remarks:
SH/T 0090-1991 “Test Method for Freezing Point of Aqueous Engine Coolants”
Deviations:
not specified
Principles of method if other than guideline:
This test method involves the determination of the time-temperature curve prior to freezing and the determination of the horizontal or flattened portion of the freezing curve. The freezing point is taken as the intersection of projections of the cooling curve and the freezing curve. If the solution supercools, the freezing point is the maximum temperature reached after supercooling.
GLP compliance:
not specified
Type of method:
method to determine freezing temperature
Melting / freezing pt.:
< -35 °C
Atm. press.:
ca. 101.2 kPa
Decomposition:
no
Sublimation:
no
Conclusions:
Based on the test results, the freezing point of tert-butylbenzene(EC: 202-632-4) could be confirmed as lower than -35 °C.
Executive summary:

Environment temperature 25 °C    Humidity 60%     Atmospheric pressure 101.2kPa

Sampling volume 85 mL. The sample did not crystallize even at -35 °C, this exceed the minimum detection limit of the instrument. After the duplicated tests, the result was achieved to be < -35 °C.

Description of key information

The freezing range was determined according to SH/T 0090-1991 "Test Method for Freezing Point of Aqueous Engine Coolants".

Key value for chemical safety assessment

Melting / freezing point at 101 325 Pa:
-35 °C

Additional information