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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:
11 January 2018 to 16 February 2018
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to guideline
Guideline:
OECD Guideline 103 (Boiling Point)
Version / remarks:
27 July 1995
Deviations:
no
GLP compliance:
no
Other quality assurance:
other: ISO 9001:2015
Type of method:
differential scanning calorimetry
Specific details on test material used for the study:
- Appearance: Viscous amber liquid (determined by CharlesRiver Den Bosch)
- Purity/Composition: >85%
- Test item storage: At room temperature

Additional information
- Test Facility test item number: 209080/A
- Purity/Composition correction factor: No correction factor required
- Test item handling: No specific handling conditions required
- Molecular structure: Not indicated
- Molecular formula: C63H116O12
- Molecular weight: 1065.6
Key result
Atm. press.:
1 013 hPa
Decomposition:
yes
Decomp. temp.:
> 300 °C

Preliminary Test

The TGA curve of the test item is shown in Figure 1. Starting at 350°C, the weight of the sample decreased significantly. At 411°C, the sample weight had decreased by 25%.

After the experiment, an orange molten residue remained in the sample container (original colour: amber). The change of the colour indicated reaction and/or decomposition of the test item.

 

Main Study

The DSC curve obtained with Experiment 1 is shown inFigure 2. During cooling three exothermic peaks were observed (results are archived in the raw data). These exothermic peaks were observed between 0°C and -70°C. These effects were attributed to crystallization of the test item.

During heating three endothermic effects were observed. The first appeared between -80°C and -25°C and had an extrapolated onset temperature of -55.096°C. The effect was most likely obtained due to melting of a part of the test item. The second and the third endothermic peaks were observed between -25°C and 25°C and were not completely resolved. Therefore, an extrapolated onset could not be determined. The peak maximum of the third peak was 4.800°C. The effects were most likely obtained due to melting of parts of the test item. An endothermic effect was starting at 300°C. The endothermic effect was probably obtained due to reaction and/or decomposition of the test item.

After the experiment, a light yellow molten residue remained in the sample container (original colour: amber). The change of the colour indicated reaction and/or decomposition of the test item

Experiment 2 was performed as a duplicate of Experiment 1. Figure 3shows the DSC curve obtained. Similar results as in Experiment 1 were obtained. The extrapolated onset of the first melting peak was -55.729°C. The peak maximum of the third peak was 4.485°C . After the experiment the residue was unchanged in the sample container. 

The melting temperature was determined as a melting range obtained from the average extrapolated onset of the first melting temperature (-55.4°C) and the average peak maximum of the last melting temperature (4.6°C).

Conclusions:
The boiling point of the test substance was found to decompose at >300 °C, at 1013 hPa; under the conditions of the test.
Executive summary:

In this guideline (OECD 103) study, [conducted with GLP certification], the boiling point of the test substnce (EC 205-363-0) was found to be decompose at >300 °C 1013 hPa.

Description of key information

Study conducted to recognised testing guidelines [with GLP certification].

Key value for chemical safety assessment

Additional information

The boiling point of the test substance was found to decompose at >300 °C, at 1013 hPa; under the conditions of the test.

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