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Physical & Chemical properties

Boiling point

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Reference
Endpoint:
boiling point
Type of information:
experimental study
Adequacy of study:
key study
Study period:
Experimental start date: 12 January 2016 Experimental completion date: 25 March 2016
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to
Guideline:
EU Method A.2 (Boiling Temperature)
Version / remarks:
The determination was carried out by differential scanning calorimetry, using a procedure designed to be compatible with Method A2 Boiling Temperature of Commission Regulation (EC) No 440/2008 of 30 May 2008 and Method 103 of the OECD Guidelines for Testing of Chemicals, 27 July 1995.
Deviations:
no
GLP compliance:
yes (incl. certificate)
Type of method:
differential scanning calorimetry
Key result
Boiling pt.:
ca. 198 °C
Atm. press.:
103 kPa
Decomposition:
yes
Decomp. temp.:
> 198 °C
Remarks on result:
other:
Remarks:
Overall result: partial boil from approximately 198 °C (471 K) with subsequent decomposition.
Conclusions:
The test item has been determined to partially boil from approximately 198 °C (471 K) at 103 kPa. The components of the test item that had not boiled may subsequently have started to decompose.
Executive summary:

Boiling Point.

Partially boiled from approximately 198 °C (471 K) at 103 kPa by differential scanning calorimetry, designed to be compatible with Method A2 Boiling Temperature of Commission Regulation (EC) No 440/2008 of 30 May 2008 and Method 103 of the OECD Guidelines for Testing of Chemicals, 27 July 1995. The components of the test item that had not boiled may subsequently have started to decompose.

Description of key information

Boiling Point.

Partially boiled from approximately 198 °C (471 K) at 103 kPa by differential scanning calorimetry, designed to be compatible with Method A2 Boiling Temperature of Commission Regulation (EC) No 440/2008 of 30 May 2008 and Method 103 of the OECD Guidelines for Testing of Chemicals, 27 July 1995. The components of the test item that had not boiled may subsequently have started to decompose.

Key value for chemical safety assessment

Boiling point at 101 325 Pa:
254 °C

Additional information

As the test item was a complex mixture, it was considered that only a partial boiling occurred. The less volatile components then probably started to slowly decompose which is suggested by the erratic baseline between the main endotherm and 400 °C. Also with the test item being a complex mixture, the boiling endotherm was quite broad with a significant leading slope. For this reason, the pre-pierced lid determinations were used for the test result as these were more consistent and prevented excessive volatilization prior to actual boiling.

Therefore, between approximately 175 and 200 °C some volatilization can occur.

 

The extrapolated onset temperature suggested a boiling point of approximately 254 °C. As the endotherm had a somewhat gradually sharpening leading edge, the extrapolated onset value is probably not overly significant in defining the boiling point result.

 

It was unknown why there was minimal to no residue in the crucibles after the tests, even though the weighing suggested there was. It could be that the residue was clear/colourless and difficult to see or that most of it had condensed on the cooler lid and, although weighed, was missed in the observation.