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EC number: 811-683-7 | CAS number: 1799707-26-8
Melting point / freezing point
Administrative data
Link to relevant study record(s)
- 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
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 102 (Melting point / Melting Range)
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.1 (Melting / Freezing Temperature)
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- EPA OPPTS 830.7200 (Melting Point / Melting Range)
- Deviations:
- no
- GLP compliance:
- yes (incl. QA statement)
- Type of method:
- differential scanning calorimetry
- 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
- 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).
Reference
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).
Description of key information
Key value for chemical safety assessment
- Melting / freezing point at 101 325 Pa:
- -50 °C
Additional information
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