2,2'-(2-methylpropylidene)bis[4,6-xylenol]

Boiling point

Link to relevant study record(s)

Reference

Endpoint:

boiling point

Type of information:

experimental study

Adequacy of study:

key study

Study period:

25 July 2016 to 26 August 2016

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Reason / purpose for cross-reference:

reference to same study

Reason / purpose for cross-reference:

reference to same study

Reason / purpose for cross-reference:

reference to same study

Reason / purpose for cross-reference:

reference to same study

Reason / purpose for cross-reference:

reference to same study

Qualifier:

according to guideline

Guideline:

EU Method A.2 (Boiling Temperature)

Version / remarks:

European Community (EC), EC no. 440/2008, Part A: Methods for the Determination of Physico-Chemical Properties, Guideline A.2: “Boiling Temperature”, Official Journal of the European Union no. L142, May 31, 2008.

Deviations:

no

Qualifier:

according to guideline

Guideline:

OECD Guideline 103 (Boiling Point)

Version / remarks:

Organization for Economic Co-operation and Development (OECD), OECD Guidelines for the Testing of Chemicals no. 103: "Boiling Point", July 27, 1995.

Deviations:

no

Qualifier:

according to guideline

Guideline:

EPA OPPTS 830.7220 (Boiling Point / Boiling Range)

Version / remarks:

United States Environmental Protection Agency (EPA), Product Properties Test Guidelines no. OPPTS 830.7220: "Boiling Point/Boiling Range", August 1996.

Deviations:

no

GLP compliance:

yes (incl. QA statement)

Type of method:

differential scanning calorimetry

Specific details on test material used for the study:

Not further details specified in the study report

Key result

Atm. press.:

1 013.25 hPa

Decomposition:

yes

Decomp. temp.:

> 250 °C

Remarks on result:

not determinable

Remarks:

Due to decomposition of the test substance

Preliminary test

The TGA-curve of the test item is shown in Figure 1. At approximately 70°C a mechanical shock was observed. This did not influence the measurement. From 200°C upwards the weight of the sample decreased significantly. At 272°C the sample weight had decreased by 25%.

After the experiment no test item was observed in the sample container.

 

Main study

One minor and one major endothermic peak between 125°C and 175°C were observed. The extrapolated onset temperature of the minor peak was 149.39°C. This signal was most probably linked to the presence of an impurity or another crystallographic species.

An endothermic peak was observed between 250°C and 325°C. The effect was most likely obtained due to reaction and/or decomposition of the test item. After the experiment, a small amount of black residue remained in the sample container.

A closed sample container was applied to investigate the endothermic peak between 250°C and 325°C.

During cooling no effects were observed which were due to crystallization of the test item (results are archived in the raw data).

During the second heating a glass transition was observed between 25°C and 50°C. The inflection point of the glass transition was 40.53°C. An exothermic peak was observed between 50°C and 125°C. The effect was obtained due to cold crystallization of the test item.

The endothermic peak between 250°C and 325°C did not shift to higher temperatures. It supported that reaction and/or decomposition of the test item was the reason for the endothermic effect. After the experiment, a small amount of black residue remained in the sample container.

Conclusions:

Reaction and/or decomposition of Lowinox® 22IB46 was observed during DSC experiments 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 purpose of the study was to determine the physico-chemical properties for Lowinox® 22IB46.

 

The boiling temperature of the test item were determined using differential scanning calorimetry (DSC) in accordance with the following guidelines:

European Community (EC), EC no. 440/2008, Part A: Methods for the Determination of Physico-Chemical Properties, Guideline A.2: “Boiling 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. 103: "Boiling Point", July 27, 1995.

United States Environmental Protection Agency (EPA), Product Properties Test Guidelines no. OPPTS 830.7220: "Boiling Point/Boiling Range", August 1996.

 

Reaction and/or decomposition of Lowinox® 22IB46 was observed during DSC experiments 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

Determination of the boiling temperature could not obtained in a GLP accredited laboratory study using DSC in accordance with EU Method A.2, OECD Guideline 103 and US EPA Procedure OPPTS 830.7220.

Additional information

Reaction and/or decomposition of Lowinox® 22IB46 was observed during DSC experiments 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.