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EC number: 830-582-9 | CAS number: 1951440-04-2
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:
- 24 December 2018 - 28 February 2019
- Reliability:
- 1 (reliable without restriction)
- Qualifier:
- equivalent or similar to guideline
- Guideline:
- OECD Guideline 102 (Melting point / Melting Range)
- Qualifier:
- equivalent or similar to guideline
- Guideline:
- EU Method A.1 (Melting / Freezing Temperature)
- Qualifier:
- equivalent or similar to guideline
- Guideline:
- EPA OPPTS 830.7200 (Melting Point / Melting Range)
- GLP compliance:
- yes
- Type of method:
- differential scanning calorimetry
- Specific details on test material used for the study:
- Identification: 4,4'-(4-methylpentane-2,2-diyl)bis((heptyloxy)benzene)
Batch (Lot) Number: AS455433
Expiry date: 01 November 2020 (retest date) (taken from
label)
Physical Description: Colourless to light yellow viscous liquid
Purity/Composition: 98.5%
Storage Conditions: At room temperature protected from light - Key result
- Melting / freezing pt.:
- ca. -63.8 °C
- Decomposition:
- yes
- Decomp. temp.:
- > 250 °C
- Remarks on result:
- not determinable
- Remarks:
- No melting point was determined. A glass transition of the test item was observed at -63.8°C
- Conclusions:
- The melting and boiling temperature of 4,4'-(4-methylpentane-2,2-diyl)bis((heptyloxy) benzene) were determined by DSC.
No melting point was determined. A glass transition of the test item was observed at -63.8°C (209.3K). - Executive summary:
The melting and boiling temperature of the test item were determined using differential scanning calorimetry (DSC). This technique records the difference in heat flow of two crucibles, one filled with test item and the other left empty or containing an inert reference substance, while these crucibles are subjected to a controlled temperature programme. A transition of the test item, such as melting or boiling, is indicated by a deviation from the base line in the heat flow record. Because melting and boiling are processes in which heat is consumed, the deviation from the base line is in the endothermic direction for these processes. The melting temperature or boiling temperature (if any) of the test item is evaluated from the DSC curve as the extrapolated onset temperature of the endothermic melting or boiling effect.
As a safety precaution for the DSC cell a preliminary test was performed using a thermogravimetric analyzer (TGA).
No melting point was determined. A glass transition of the test item was observed at -63.8°C (209.3K).
Reference
Description of key information
The melting and boiling temperature of 4,4'-(4-methylpentane-2,2-diyl)bis((heptyloxy) benzene) were determined by DSC.
No melting point was determined. A glass transition of the test item was observed at -63.8°C (209.3K).
Key value for chemical safety assessment
- Melting / freezing point at 101 325 Pa:
- -63.8 °C
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