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Physical & Chemical properties

Melting point / freezing point

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melting point/freezing point
Type of information:
experimental study
Adequacy of study:
key study
Study period:
30 May - 28 June 2005
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
guideline study with acceptable restrictions
The study was conducted according to an internationally recognised method, and under GLP. However, the test item identification is incomplete (unspecified cis-trans isomery, therefore identified under the generic CAS 17129-06-5). Therefore validation applies with restrictions.
according to guideline
EU Method A.1 (Melting / Freezing Temperature)
Version / remarks:
Directive 92/69/EEC
according to guideline
other: ASTM E 537-84
GLP compliance:
yes (incl. QA statement)
Certificate from 2004-12-22
Type of method:
thermal analysis
Key result
Melting / freezing pt.:
-29.5 °C

The extrapolated onset temperatures were retained:

sample 1: -29.64°C

sample 2: -29.71°C

Executive summary:

The melting point of the test item was determined, under GLP, according to EU A.1 guideline, with Differential Thermal Analysis (DTA) method. Two measurements were performed, and the mean of onset values was retained. The melting point, i.e. solid-to-liquid transition, has been determined to be -29.5°C.

Description of key information

Melting (i.e. solid to liquid transition) point = -29.5°C.

Key value for chemical safety assessment

Melting / freezing point at 101 325 Pa:
-29.5 °C

Additional information

An experimental study, conducted according to EU guideline and GLP, is available. Despite restrictions due to incomplete test item identification (i.e. unspecified cis-trans isomery), it is considered as reliable, and the result is retained as key data.