[No public or meaningful name is available]

Boiling point

Administrative data

Endpoint:

boiling point

Data waiving:

study scientifically not necessary / other information available

Justification for data waiving:

the study does not need to be conducted because the substance is a solid which decomposes before boiling

Cross-reference

Reason / purpose for cross-reference:

data waiving: supporting information

Reference

Endpoint:

melting point/freezing point

Type of information:

experimental study

Adequacy of study:

key study

Study period:

27 July 2020 - 22 September 2020

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Reason / purpose for cross-reference:

reference to same study

Qualifier:

according to guideline

Guideline:

EU Method A.1 (Melting / Freezing Temperature)

Version / remarks:

2016

Deviations:

no

Qualifier:

according to guideline

Guideline:

OECD Guideline 102 (Melting point / Melting Range)

Version / remarks:

1995

Deviations:

no

Qualifier:

according to guideline

Guideline:

EPA OPPTS 830.7200 (Melting Point / Melting Range)

Version / remarks:

1998

Deviations:

no

GLP compliance:

yes

Type of method:

differential scanning calorimetry

Key result

Melting / freezing pt.:

215.4 °C

Atm. press.:

1 013.25 hPa

Atm. press.:

1 013.25 hPa

Decomposition:

yes

Decomp. temp.:

215.4 - 240 °C

TGA EXPERIMENT (PRELIMINARY TEST)

The weight of the sample decreased significantly at temperatures above 425°C: 25% decrease at 468°C and 48% decarease at 550°C.

Appearance of the sample after the experiment: a black charred expanded residue remained in the sample container (original colour: off white).

The decrease in weight and change of colour are indicators for reaction and/or decomposition of the test item.

 

DSC EXPERIMENT 1

During heating, an endothermic effect was observed between 175°C and 225°C followed by an exothermic effect starting at 350°C. The extrapolated onset temperature of the first effect was 215.242°C. The endothermic effect was most likely obtained due to melting of the test item. The exothermic effect was probably obtained due to reaction and/or decomposition of the test item.

After the experiment, a black molten residue remained in the sample container (original colour: off white). The change of the colour indicated reaction and/or decomposition of the test item. Based on this visual observation, it was found that the test item had molten and the change of the colour demonstrated reaction and/or decomposition of the test item.

 

DSC EXPERIMENT 2

In order to investigate the endothermic effect, Experiment 2 was stopped directly after the melting effect. The extrapolated onset temperature was 215.484°C.

After the experiment, an orange molten residue remained in the sample container (original colour: off white). Based on this visual observation, it was found that the
test item had molten and the change of the colour demonstrated reaction and/or decomposition of the test item.

 

DSC curve: see illustration below.

 

RESULT

Melting temperature: mean extrapolated onset temperature of Experiment 1 (215.2°C) and Experiment 2 (215.5°C).

Boiling temperature: the substance has no boiling temperature. Reaction and/or decomposition of the substance was observed before boiling. 

 

Conclusions:

The melting temperature of the substance was determined to be 215.4°C.

Executive summary:

The melting and boiling temperature of the test item were determined in a GLP study using Differential Scanning Calorimetry (DSC). The experiments were in accordance with EC A.1, OECD 102 and OPPTS 830.7200 (melting temperature) and EC A.2, OECD TG 103 and OPPTS 830.722 (boiling temperature). 

The DSC curve showed an endothermic effect due to melting. The melting temperature of the substance was determined in duplicate obtaining a mean value of 215.4°C.

Reaction and/or decomposition temperature of the substance was determined to be in the range of 215.4-240°C. 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.

 

 

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

2020

Report date:

2020