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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:
29 April 2015 to 2 September 2015
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
other: Study performed according to EU, OECD and EPA test guidelines to a GLP recognised standard
Qualifier:
according to
Guideline:
EU Method A.1 (Melting / Freezing Temperature)
Deviations:
no
Qualifier:
according to
Guideline:
OECD Guideline 102 (Melting point / Melting Range)
Deviations:
no
Qualifier:
according to
Guideline:
EPA OPPTS 830.7200 (Melting Point / Melting Range)
Deviations:
no
GLP compliance:
yes (incl. certificate)
Type of method:
other: differential scanning calorimetry
Melting / freezing pt.:
178 °C
Atm. press.:
1 013.25 hPa
Decomposition:
yes
Decomp. temp.:
275 °C
Conclusions:
The melting temperature of (1,2-Dioxoethylen)bis(iminoethylen)bis[3-(3,5-di-tert-butyl-4- hydroxyphenyl)propionat] was determined at 178°C (451K) by using DSC.
Reaction and/or decomposition of (1,2-Dioxoethylen)bis(iminoethylen)bis[3-(3,5-di-tert-butyl-4- hydroxyphenyl)propionat] was observed during DSC experiments starting at 275°C (548K). Boiling of the test substance was not observed below the temperature at which reaction and/or decomposition started. Based on this, the test substance has no boiling temperature.
Executive summary:

The melting and boiling temperature of the test substance were determined using differential scanning calorimetry (DSC). This technique records the difference in heat flow of two crucibles, one filled with test substance and the other left empty as reference, while these crucibles are subjected to a controlled temperature programme. A transition of the test substance, such as melting or evaporation, is indicated by a deviation from the base line in the heat flow record. Because melting and evaporation 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 substance is evaluated from the DSC curve as the extrapolated onset temperature of the endothermic melting or evaporation peak.

 

Test was conducted in accordance to:

European Community (EC), EC no. 440/2008, Part A: Methods for the Determination of Physico-Chemical Properties, Guideline A.1: “Melting/Freezing Temperature”, Official Journal of the European Union no. L142, May 31, 2008.

Organization for Economic Co-operation and Development (OECD), OECD Guidelines for the Testing of Chemicals no. 102: "Melting Point / Melting Range", July 27, 1995.

United States Environmental Protection Agency (EPA), Product Properties Test Guidelines no.OPPTS 830.7200: "Melting Point/Melting Range", March 1998.

      

Results of the DCS concluded the melting temperature of (1,2-Dioxoethylen)bis(iminoethylen)bis[3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionat] was determined at 178°C (451K) by using DSC.

Description of key information

Melting temperature was determined to be 178°C (451K) by using DSC.

Key value for chemical safety assessment

Melting / freezing point at 101 325 Pa:
178 °C

Additional information

The melting temperature of (1,2-Dioxoethylen)bis(iminoethylen)bis[3-(3,5-di-tert-butyl-4 - hydroxyphenyl)propionat] was determined at 178°C (451K) by using DSC. Reaction and/or decomposition of (1,2-Dioxoethylen)bis(iminoethylen)bis[3-(3,5-di-tert-butyl-4-

hydroxyphenyl)propionat] was observed during DSC experiments starting at 275°C (548K).