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Physical & Chemical properties

Boiling point

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Administrative data

Link to relevant study record(s)

Reference
Endpoint:
boiling 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:
EU Method A.2 (Boiling Temperature)
Qualifier:
equivalent or similar to guideline
Guideline:
OECD Guideline 103 (Boiling Point/Boiling Range)
Qualifier:
equivalent or similar to guideline
Guideline:
EPA OPPTS 830.7220 (Boiling Point / Boiling 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
Decomposition:
yes
Decomp. temp.:
> 250 °C
Remarks on result:
not determinable
Remarks:
reaction and/or decomposition of the test item at > 250°C (> 523K) was observed
Conclusions:
The melting and boiling temperature of 4,4'-(4-methylpentane-2,2-diyl)bis((heptyloxy) benzene) were determined by DSC.
Reaction and/or decomposition of the test item was observed during DSC experiment at temperatures of > 250°C (> 523K). Boiling of the test item was not observed below the temperature at which reaction and/or decomposition started. Based on this, the test item has no boiling temperature.
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).

Reaction and/or decomposition of the test item was observed during DSC experiment at temperatures of > 250°C (> 523K). Boiling of the test item was not observed below the temperature at which reaction and/or decomposition started. Based on this, the test item has no boiling temperature.

Description of key information

Reaction and/or decomposition of the test item was observed during DSC experiment at temperatures of > 250°C (> 523K). Boiling of the test item was not observed below the temperature at which reaction and/or decomposition started. Based on this, the test item has no boiling temperature.

Key value for chemical safety assessment

Additional information