Registration Dossier

Physical & Chemical properties

Melting point / freezing point

Currently viewing:

Administrative data

Link to relevant study record(s)

Reference
Endpoint:
melting point/freezing point
Type of information:
experimental study
Adequacy of study:
key study
Study period:
From January 31 to October 01, 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 considered to be adequately characterised. Therefore full validation applies.
Qualifier:
according to
Guideline:
OECD Guideline 102 (Melting point / Melting Range)
Deviations:
no
Qualifier:
according to
Guideline:
EU Method A.1 (Melting / Freezing Temperature)
Deviations:
no
Qualifier:
according to
Guideline:
other: BS4633
Principles of method if other than guideline:
Not applicable
GLP compliance:
yes (incl. certificate)
Remarks:
UK GLP Compliance Programme (inspected on August 21, 2007/ signed on October 15, 2007)
Type of method:
method to determine freezing temperature
Specific details on test material used for the study:
Storage condition of test material: Approximately 4 °C in the dark, under nitrogen.
Melting / freezing pt.:
< -20 °C

Determinations 1 and 2:

Observations: The test material became increasingly viscous during cooling

Result: Freezing temperature < 253 K (< -20 °C)

accuracy ± 0.5 °C

Conclusions:
No further testing is required.
Executive summary:

The freezing point of the test substance was determined under GLP according to EU Method A.1 and OECD 102, by using BS4633: Method for the Determination of Crystallizing Point. Two main runs were performed, and no freezing was observed at the minimum test temperature.

 

The freezing temperature of test substance has been determined to be less than < 253 ± 0.5 K (< -20 ± 0.5 °C).

Description of key information

Freezing point < -20 °C.
No further testing required.

Key value for chemical safety assessment

Additional information

A fully reliable experimental study, conducted according to a recognized OECD/EC method and under GLP, is available. It is considered as a key study. As no crystallisation was observed down to -20°C, the result is expressed as a limit value, and cannot be retained as key data for purpose of CSA.