Registration Dossier

Physical & Chemical properties

Boiling point

Currently viewing:

Administrative data

Link to relevant study record(s)

Reference
Endpoint:
boiling point
Type of information:
experimental study
Adequacy of study:
key study
Study period:
23 February - 22 April, 2015
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. No deviation was reported. Test substance is adequately specified with isomer purity. Therefore full validation applies.
Qualifier:
according to
Guideline:
OECD Guideline 103 (Boiling point/boiling range)
Deviations:
no
Qualifier:
according to
Guideline:
EU Method A.2 (Boiling Temperature)
Deviations:
no
Principles of method if other than guideline:
Not applicable
GLP compliance:
yes (incl. certificate)
Remarks:
UK GLP compliance programme (inspected on 05 February 2014 / signed on 07 October 2015)
Type of method:
method according to Siwoloboff
Key result
Decomposition:
yes
Decomp. temp.:
> 130 °C
Remarks on result:
other: boiling temperature of test substance was not determinable, as the test substance decomposed at temperatures above approximately 130°C, under normal atmospheric pressure, before boiling.

The trial determination showed an approximate decomposition point of 140 °C. When heating was continued in this preliminary test, the decomposed sample appeared to boil at approximately 270 °C.

The results of duplicate definitive boiling point determinations on test substance were as follows:

Barometric pressure: 1033 mbar.

As the boiling tubes were heated at 1 °C /minute, both samples were observed to darken above approximately 130 °C, indicating decomposition. In the case of decomposition, correction is considered superfluous as the determination of decomposition is slightly subjective and can only be regarded as an approximate value.
Executive summary:

The boiling point of the test substance was measured under GLP according to OECD 103 / EU A2 guideline, Siwoloboff (capillary) method.

The results of duplicate definitive boiling point determinations on test substance were as follows:

As the boiling tubes were heated at 1°C /minute, both samples were observed to darken above approximately 130 °C, indicating decomposition.

 

The boiling temperature of the test substance was not determinable, as the test substance decomposed at temperatures above approximately 130 °C, under normal atmospheric pressure, before boiling.

Description of key information

Decomposes (darkening) from ca 130°C before boiling. With prolonged heating, residue boils at ca 270°C.

Key value for chemical safety assessment

Additional information

A fully reliable experimental study, conducted according to a recognized OECD/EU method, is available. It is considered as a key study. As decomposition was observed, no key value will be retained.