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Physical & Chemical properties

Melting point / freezing point

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Link to relevant study record(s)

Reference
Endpoint:
melting point/freezing point
Type of information:
experimental study
Adequacy of study:
key study
Study period:
13 September 2010 - 14 September 2010.
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
other: GLP Study, conducted to recognised guidelines.
Reason / purpose:
reference to same study
Qualifier:
according to
Guideline:
EU Method A.1 (Melting / Freezing Temperature)
Deviations:
no
Principles of method if other than guideline:
The test is conducted to determine the temperature or temperature range of the phase transition from a liquid to a solid. The substance is placed in a special jacketed glassware which is temperature controlled and cooled by a refrigerator unit circulating silicone oil. The sample is stirred gently and continuously during cooling and the temperature is measured at 0.5°C intervals. As soon as the temperature remains constant for a few readings the temperature is recorded as the freezing point.
This method has an estimated accuracy of ± 0.5°C.
The test is conducted in accordance with the procedure described in EU Regulation (EC) 440/2008, Annex Part A test A1.
GLP compliance:
yes (incl. certificate)
Type of method:
pour point
Key result
Melting / freezing pt.:
>= -20 - <= -15 °C
Remarks on result:
other: Conducted at atmospheric pressure.

Full test results

 

Run Number

1

2

Mass of sample Used (g)

10.8

10.1

Initial Freezing Temperature (°C)

-15.3

-15.0

Final Freezing Temperature (°C)

-20.0

-20.0

 

Result : -20 to -15°C

 

Comments

The sample viscosity increased with decreasing temperatures. As a result, it was extremely difficult to stir the test material beyond 0°C.

Conclusions:
The freezing point range was determined to be -20 to -15°C.
Executive summary:

The freezing point range was determined to be -20 to -15°C.

Description of key information

Melting point/freezing point

Key value for chemical safety assessment

Melting / freezing point at 101 325 Pa:
-20 °C

Additional information

A single GLP compliant gives the melting point as -20 to -15 °C.