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Diss Factsheets

Physical & Chemical properties

Melting point / freezing point

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Administrative data

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Reference
Endpoint:
melting point/freezing point
Type of information:
experimental study
Adequacy of study:
key study
Study period:
Test dates: February 01 to 12, 2008
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Remarks:
The study was conducted according to an internationally recognised method, and under GLP. The substance is adequately identified. Therefore full validation applies.
Qualifier:
according to guideline
Guideline:
EU Method A.1 (Melting / Freezing Temperature)
GLP compliance:
yes (incl. QA statement)
Remarks:
GIPC; effective 16 March 2007 (validity 18 months)
Type of method:
differential scanning calorimetry
Specific details on test material used for the study:
Storage conditions of test material: Stored at room temperature protected from direct sun light.
Key result
Melting / freezing pt.:
-17.5 °C

Test no.

Start temperature

Heating rate

Onset temperature

1

-40 °C

+3 °C/min

-17.3 °C

2

-40 °C

+3 °C/min

-17.5 °C

3

-40 °C

+3 °C/min

-17.6 °C

Mean ± S.D.

-17.5 °C ± 0.2 °C

 

Three successive tests were retained.

Mean onset for melting occurred at -17.5 °C ± 0.2 °C. The validity criteria were fulfilled: the standard deviation within the three replicate assessments did not exceed 0.5 °C.Therefore the average value is retained as final result.

Reference material: Ethanol. Nominal onset for boiling = 78.2 ± 0.5 °C. Measured onset = 78.1 °C

Executive summary:

The melting point of the test substance was determined under GLP according to EU A1 guideline, using differential scanning calorimetry (DSC) method.

Three main runs were performed, and the mean final temperature was retained.

The melting temperature of the test substance was determined to be -17.5 °C.

Description of key information

Experimental melting point (i.e. transition from solid to liquid) = -17.5°C.

Key value for chemical safety assessment

Melting / freezing point at 101 325 Pa:
-17.5 °C

Additional information

A fully reliable experimental study, conducted according to a recognized EC method and under GLP, is available.

It is considered as a key study, and the result is retained as key data.