Heptanal, oligomeric reaction products with aniline

Melting point / freezing point

Link to relevant study record(s)

Reference

Endpoint:

melting point/freezing point

Type of information:

experimental study

Adequacy of study:

key study

Study period:

From 17 June 2016 to 13 September 2016

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Justification for type of information:

Study was conducted in accordance with OECD, EU, OECD, and US EPA test guidelines in an accredited GLP laboratory.

Qualifier:

according to guideline

Guideline:

OECD Guideline 102 (Melting point / Melting Range)

Version / remarks:

July 27, 1995

Deviations:

not specified

Qualifier:

according to guideline

Guideline:

EU Method A.1 (Melting / Freezing Temperature)

Version / remarks:

May 31, 2008.

Deviations:

not specified

Qualifier:

according to guideline

Guideline:

EPA OPPTS 830.7200 (Melting Point / Melting Range)

Version / remarks:

August 1996.

Deviations:

not specified

GLP compliance:

yes

Type of method:

differential scanning calorimetry

Specific details on test material used for the study:

Purity/composition correction factor: No correction factor required
Test item handling: No specific handling conditions required

Key result

Melting / freezing pt.:

< -80 °C

Atm. press.:

1 013.25 hPa

Decomposition:

ambiguous

Remarks on result:

other: colour change indicated reaction and/or decomposition

Preliminary test

From 200°C upwards the weight of the sample decreased significantly. At 311°C the sample weight had decreased by 25%.

 

After the experiment, an orange/brown residue remained in the sample container (original colour: amber). The change of the colour indicated reaction and/or decomposition of the test item.

Main study

During cooling no effects were observed which were due to crystallization of the test. During heating no effects were observed which were due to melting or boiling of the test item. After the experiment, an orange/brown residue remained in the sample container.

 

A lower heating rate of 5°C/minute was applied in the Experiment 2 since the colour of the test item changed while no endothermic or exothermic decomposition effects were observed. An exothermic peak between 200°C and 300°C was observed. The effect was due to reaction and/or decomposition of the test item. After the experiment, a yellow residue remained in the sample container.

 

To further investigate the melting temperature of the test item, two subsamples of the test item were stored for 26 hours at -24.0 ± 0.6°C and at -81.0 ± 3.4°C respectively. It was observed after storage that the test item was a viscous liquid (-20°C freezer) and a very viscous liquid (-80°C freezer). According to this it was concluded that the melting temperature of the test item is < -80°C (< 193K).

Conclusions:

The melting temperature of Hepteen Base® was determined to be < -80°C (< 193K) applying a storage experiment in the freezer.

Executive summary:

A study was conducted to determine the melting point/range of Hepteen Base® using differential scanning calorimetry (DSC). Study was conducted in accordance with test guidelines in a GLP accredited laboratory:

 

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.

 

In the preliminary experiment from 200°C upwards the weight of the sample decreased significantly. At 311°C the sample weight had decreased by 25%.

After the experiment, an orange/brown residue remained in the sample container (original colour: amber). The change of the colour indicated reaction and/or decomposition of the test item.

From the main experiment the melting temperature of Hepteen Base® was determined to be < -80°C (< 193K) applying a storage experiment in the freezer.

Reaction and/or decomposition of Hepteen Base® was observed during DSC experiments at temperatures of > 200°C (> 473K). 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

The melting temperature of Hepteen Base® was determined to be < -80°C (< 193K) applying a storage experiment in the freezer.

Key value for chemical safety assessment

Melting / freezing point at 101 325 Pa:

-80 °C

Additional information

A study was conducted to determine the melting point/range of Hepteen Base® using differential scanning calorimetry (DSC). Study was conducted in accordance with test guidelines in a GLP accredited laboratory:

 

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.