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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:
02-03 November 2017
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Justification for type of information:
The study was conducted according to an internationally recognised method, and under GLP. Test substance is adequately characterised. Therefore full validation applies.
Qualifier:
according to
Guideline:
OECD Guideline 102 (Melting point / Melting Range)
Version / remarks:
1995
Deviations:
no
Qualifier:
according to
Guideline:
EU Method A.1 (Melting / Freezing Temperature)
Version / remarks:
2008
Deviations:
no
Principles of method if other than guideline:
Not applicable
GLP compliance:
yes (incl. certificate)
Remarks:
Inspected on 13 and 14 October 2014 / Signed on 8 April 2015
Type of method:
differential scanning calorimetry
Key result
Melting / freezing pt.:
< -20 °C
Atm. press.:
1 013 hPa
Decomposition:
no

First, the test item was filled into glass vessels and stored for 24 hours at nominal temperatures of – 80, – 20 and 5 °C. The storage temperatures were recorded at evaluation after 24 hours.

After evaluation the following values were recorded:

Room Temperature

4.2°C

-21.6°C

-80°C

Light yellow, soft mass,

 like jelly

Soft mass ,

 like jelly

Soft mass,

 like jelly; a little bit harder than at room temperature,

but very similar

Solid like ice

As according to REGULATION (EC) No 1907/2006 OF THE EUROPEAN PARLIAMENT AND OF THE COUNCIL, Annex VII, dated 18. December 2006 (last amended by Commission Regulation (EU) 2016/2235 of 12 December 2016), the determination of the melting / freezing point does not need to be conducted below a lower limit of - 20 °C; therefore no main test was performed.

Conclusions:
In a pre-test, the test item was still unfrozen and liquid at – 20 °C. At -80 °C the test item was frozen.
According to REGULATION (EC) No 1907/2006 OF THE EUROPEAN PARLIAMENT AND OF THE COUNCIL, Annex VII, dated 18. December 2006 (last amended by Commission Regulation (EU) 2016/2235 of 12 December 2016), the determination of the melting- / freezing point does not need to be conducted below a lower limit of - 20 °C.
Therefore, no additional test was conducted and the freezing point/melting point was stated as:< - 20 °C (< 253.15 K).
Executive summary:

The study was performed in order to determine the melting/freezing point of test item according OECD 102, resp. EU A.1 guideline, using the DSC method.

The freezing point/melting point was stated as:< - 20 °C (< 253.15 K).

Description of key information

The freezing point of test item was stated as < -20°C.

Key value for chemical safety assessment

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

Additional information

A fully reliable experimental study, conducted according to OECD 102/ EU A1 guideline is available.

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