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Boiling point

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Reference
Endpoint:
boiling point
Type of information:
experimental study
Adequacy of study:
key study
Study period:
22 June 2016 to 29 June 2016
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to guideline
Guideline:
EU Method A.2 (Boiling Temperature)
Deviations:
no
Qualifier:
according to guideline
Guideline:
OECD Guideline 103 (Boiling Point)
Deviations:
no
GLP compliance:
yes (incl. QA statement)
Type of method:
differential scanning calorimetry
Key result
Boiling pt.:
>= 242.18 - <= 320.69 °C
Decomposition:
yes
Decomp. temp.:
ca. 375 °C

Test 1

- The test was conducted in an open aluminium crucible. The sample was observed to undergo an endothermic event (melting) from 66.21 °C (-5.33 J.g^-1). A second endothermic event was then observed to commence from 242.18 °C which had a heat of melting of -89.69 J.g^-1. An exothermic event was then observed to commence from 375.75 °C with a heat of decomposition of -727.54 J.g^-1

 

Test 2

- The test was conducted in an open aluminium crucible. The sample was observed to undergo an endothermic event (melting) from 46.85 °C (-22.85 J.g^-1). Another endothermic event was then observed to commence from *242.26 °C which had a heat of melting of -135.01 J.g^-1. An exothermic event then commenced *379.31 °C which had a heat of decomposition of 286.71.

The temperatures marked with an asterisk show the onset value was taken from evaluation DSC81816D2 as the software incorrectly determined the onset temperature in evaluation DSC81816D due to the presence of small peaks in the overall trace.

-The sample did not undergo a simple boiling process. This was confirmed by the fact that approximately half of the weight of the product remained in the aluminium pan as a dark brown solid after the analysis. The sample probably underwent either an endothermic decomposition followed by an exothermic decomposition, or boiling with decomposition. The exothermic decomposition of the sample started at approximately 375 °C. Boiling with decomposition is considered to be the best interpretation of the analysis and therefore a boiling range with decomposition from 242.18 – 320.69 °C is the quoted result.

Conclusions:
Under the conditions of this study, the boiling range with decomposition was 242.18 – 320.69 °C.
Executive summary:

The boiling point of the test material was investigated in accordance with the standardised guidelines OECD 103 and EU Method A.2, under GLP conditions using differential scanning calorimetry.

Duplicate tests were conducted in an open aluminium crucible.

In the first test the sample was observed to undergo an endothermic event (melting) from 66.21 °C (-5.33 J.g^-1). A second endothermic event was then observed to commence from 242.18 °C which had a heat of melting of -89.69 J.g^-1. An exothermic event was then observed to commence from 375.75 °C with a heat of decomposition of -727.54 J.g^-1

In the second test the sample was observed to undergo an endothermic event (melting) from 46.85 °C (-22.85 J.g^-1). Another endothermic event was then observed to commence from 242.26 °C which had a heat of melting of -135.01 J.g^-1. An exothermic event then commenced 379.31 °C which had a heat of decomposition of 286.71.

The sample did not undergo a simple boiling process. This was confirmed by the fact that approximately half of the weight of the product remained in the aluminium pan as a dark brown solid after the analysis. The sample probably underwent either an endothermic decomposition followed by an exothermic decomposition, or boiling with decomposition. The exothermic decomposition of the sample started at approximately 375 °C.

Boiling with decomposition is considered to be the best interpretation of the analysis and therefore a boiling range with decomposition from 242.18 – 320.69 °C is the quoted result.

Description of key information

Under the conditions of this study, the boiling range with decomposition was 242.18 – 320.69 °C.

Key value for chemical safety assessment

Additional information

The boiling point of the test material was investigated in accordance with the standardised guidelines OECD 103 and EU Method A.2, under GLP conditions using differential scanning calorimetry. The study was awarded a reliability score of 1 in accordance with the criteria set forth by Klimisch et al. (1997).

Duplicate tests were conducted in an open aluminium crucible.

In the first test the sample was observed to undergo an endothermic event (melting) from 66.21 °C (-5.33 J.g^-1). A second endothermic event was then observed to commence from 242.18 °C which had a heat of melting of -89.69 J.g^-1. An exothermic event was then observed to commence from 375.75 °C with a heat of decomposition of -727.54 J.g^-1

In the second test the sample was observed to undergo an endothermic event (melting) from 46.85 °C (-22.85 J.g^-1). Another endothermic event was then observed to commence from 242.26 °C which had a heat of melting of -135.01 J.g^-1. An exothermic event then commenced 379.31 °C which had a heat of decomposition of 286.71.

The sample did not undergo a simple boiling process. This was confirmed by the fact that approximately half of the weight of the product remained in the aluminium pan as a dark brown solid after the analysis. The sample probably underwent either an endothermic decomposition followed by an exothermic decomposition, or boiling with decomposition. The exothermic decomposition of the sample started at approximately 375 °C.

Boiling with decomposition is considered to be the best interpretation of the analysis and therefore a boiling range with decomposition from 242.18 – 320.69 °C is the quoted result.

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