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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:
16 May 2013
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to guideline
Guideline:
OECD Guideline 102 (Melting point / Melting Range)
Qualifier:
according to guideline
Guideline:
EU Method A.1 (Melting / Freezing Temperature)
Qualifier:
according to guideline
Guideline:
EPA OPPTS 830.7200 (Melting Point / Melting Range)
Principles of method if other than guideline:
Not applicable
GLP compliance:
yes (incl. QA statement)
Type of method:
method to determine freezing temperature
Key result
Melting / freezing pt.:
< -50 °C
Atm. press.:
101 325 Pa

Calibration of the thermometer

The thermometer was checked against a certified thermometer on November 09, 2012. A correction did not need to be applied.

 

Preliminary test

The preliminary test was performed as described. No congealing was observed down to a temperature of — 50.0 “C.

 

Main test

As no congealing was observed in the preliminary test, no further tests were undertaken.

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

The freezing point of the test item was determined according to the OECD guideline No. 102 (freezing temperature method), under GLP.


In the preliminary test, using a cooling bath down to - 50.0°C (223.15 K), no solidification occured.
Therefore, the main test was not conducted.


No freezing was observed down to a temperature of - 50.0°C . Therefore: Freezing point of test item is stated as below - 50.0 °C.

Description of key information

Experimental freezing point < -50°C. (OECD 102, GLP)
No further testing is required.

Key value for chemical safety assessment

Additional information

A fully reliable experimental study, conducted according to a recognized OECD method and under GLP, is available.
It is considered as a key study; the result being expressed as a limit value, it is not retained as key data for CSA.