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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
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
guideline study without detailed documentation
Remarks:
The study was conducted according to an internationally recognised method, but without detailed documentation. The test substance is adequately identified. Therefore validation applies with restrictions.
Qualifier:
according to guideline
Guideline:
OECD Guideline 102 (Melting point / Melting Range)
Version / remarks:
27th July 1995
Qualifier:
according to guideline
Guideline:
EU Method A.1 (Melting / Freezing Temperature)
Version / remarks:
Regulation (EC) No 440/2008
Qualifier:
according to guideline
Guideline:
other: BS4633, Method for the Determination of Crystallizing Point.
GLP compliance:
no
Type of method:
method to determine freezing temperature
Key result
Melting / freezing pt.:
< -20 °C
Atm. press.:
980 hPa

Accuracy: ± 0.5°C

Note that the sample was also kept in the freezer at -25°C. After 5 days storage, the sample was more viscous, but no crystallization was observed.

Conclusions:
No further testing required (< -20°C).
Executive summary:

The freezing point of the test substance was determined according to OECD 102/EU A1 guideline using BS4633 method for the determination of crystallizing point.

An aliquot was placed in a cooling bath, and the temperature was recorded at regular intervals.

No freezing was observed down to the minimum test temperature of -20°C.

Description of key information

Freezing point < -20°C.

No further testing is required.

Key value for chemical safety assessment

Additional information

A reliable experimental study, conducted according to a recognized OECD/EC/BS guideline, is available. Despite restrictions for lack of experimental details, it is considered as a key study.

As no freezing was observed down to -20°C, the result is expressed as a limit value, and cannot be retained as key data.

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