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Diss Factsheets

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:
19/6/2020
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
study well documented, meets generally accepted scientific principles, acceptable for assessment
Justification for type of information:
Testing performed in accordance to internally validated methods at Palsgaard
Qualifier:
no guideline followed
Principles of method if other than guideline:
Testing performed in accordance to internally validated methods at Palsgaard (See attached study report).
GLP compliance:
no
Other quality assurance:
other:
Remarks:
internally validated testing protocol
Type of method:
other: Differential scanning calorimetry
Specific details on test material used for the study:
SOURCE OF TEST MATERIAL
- Source and lot/batch number of test material: P18-36-3
Key result
Boiling pt.:
> 213 °C
Atm. press.:
0.04 mBar
Decomposition:
yes
Remarks:
possible decomposition observed
Decomp. temp.:
ca. 431 °C

Signal observed at 431 °C, which may originate from a component in the sample that boils at this temperature or the signal at 431 °C stems from decomposition of the sample.

A better figure for the boiling point is the temperature used to distill the reaction mixture at very low pressure: 213 °C at 0.04 mbar.

Conclusions:
A correct boiling point temperature at very low pressure (0.04 mbar) is 213 °C.
Executive summary:

According to the literature glycerol monobehenate (GMB) melts above 500 °C (533.8/525.8 °C). As the available analytical instrument at the physical chemical lab has a maximum temperature limit of 500 °C, it was not expected that an accurate value for the boiling point could be obtained.

The sample used for determination of the melting profile was subsequently used for investigating the boiling point. The samples was subjected to the temperature program: 25 °C -500°C with 10 °C/min.

It was rather surprising to see a signal around 431 °C, which may originate from a component in the sample that boils at this temperature. A more plausible explanation though is that the signal at 431 °C stems from decomposition of the sample.

A better figure for the boiling point is the temperature used to distill the reaction mixture at very low pressure: 213 °C at 0.04 mbar.

Description of key information

Key value for chemical safety assessment

Additional information

According to the literature glycerol monobehenate (GMB) melts above 500 °C (533.8/525.8 °C). As the available analytical instrument at the physical chemical lab has a maximum temperature limit of 500 °C, it was not expected that an accurate value for the boiling point could be obtained.

The sample used for determination of the melting profile was subsequently used for investigating the boiling point. The samples was subjected to the temperature program: 25 °C -500°C with 10 °C/min.

It was rather surprising to see a signal around 431 °C, which may originate from a component in the sample that boils at this temperature. A more plausible explanation though is that the signal at 431 °C stems from decomposition of the sample.

A better figure for the boiling point is the temperature used to distill the reaction mixture at very low pressure: 213 °C at 0.04 mbar.