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Physical & Chemical properties

Melting point / freezing point

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Reference
Endpoint:
melting point/freezing point
Type of information:
experimental study
Adequacy of study:
key study
Study period:
2016-08-02 to 2016-09-01
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Reference:
Composition 0
Qualifier:
according to
Guideline:
OECD Guideline 102 (Melting point / Melting Range)
Deviations:
no
Qualifier:
according to
Guideline:
EU Method A.1 (Melting / Freezing Temperature)
Deviations:
no
Qualifier:
according to
Guideline:
EPA OPPTS 830.7200 (Melting Point / Melting Range)
Deviations:
no
GLP compliance:
yes (incl. certificate)
Type of method:
differential scanning calorimetry
Test material information:
Composition 1
Specific details on test material used for the study:
SOURCE OF TEST MATERIAL
- Source and lot/batch No.of test material: 16020201
- Expiration date of the lot/batch: 21 March 2021

Key result
Melting / freezing pt.:
-50 °C
Atm. press.:
1 013.25 hPa
Decomposition:
yes
Decomp. temp.:
> 350 °C
Remarks on result:
other: glass transition

During cooling a glass transition was observed between -80°C and -50°C (results are archived in the raw data). During heating a glass transition between -75°C and -25°C was observed. The inflection point of the glass transition was -50.00°C. After the experiment the sample appeared to have been unchanged, i.e. no decomposition and/or evaporation were observed.

The inflection point of the glass transition was -49.65°C. An endothermic peak was observed from 350°C. After the experiment, a yellowish residue remained in the sample container. Based on this, the endothermic effect was due to reaction and/or decomposition of the test item. The glass transition was determined as the average glass transition obtained from Experiment 1 (-50.00°C) and Experiment 2 (-49.65°C).

Conclusions:
The melting temperature (glass transition) of substance was determined at -50°C (223K) by using DSC.
Reaction and/or decomposition of 4,4'-(1-phenylethane-1,1-diyl)bis(heptyloxybenzene) was observed during DSC experiments at temperatures of > 350°C (> 623K).
Executive summary:

The melting temperature (glass transition) of the substance is -50°C (223K).

Description of key information

Key value for chemical safety assessment

Melting / freezing point at 101 325 Pa:
-50 °C

Additional information