[No public or meaningful name is available]

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:

2022-01-11 to 2022-02-10

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

OECD Guideline 102 (Melting point / Melting Range)

Version / remarks:

1995

Deviations:

no

Qualifier:

according to guideline

Guideline:

EU Method A.1 (Melting / Freezing Temperature)

Deviations:

no

GLP compliance:

yes (incl. QA statement)

Type of method:

differential scanning calorimetry

Key result

Melting / freezing pt.:

> -51 - < -49 °C

Atm. press.:

> 1 014 - < 1 023 hPa

Decomposition:

yes

Decomp. temp.:

> 260 - < 440 °C

Results of the DSC measurements are shown in Table 1.

Table 1: Results of the DSC measurements

Measurement	Sample [mg]	Onset of effect [°C]	Range of effect [°C]	Weight loss [mg]	Atmos. pressure [hPa]
1	8.67	-48.88 61.68 336.09	-50 to -30 (endo) 30 to 210 (endo) 260 to 440 (endo)	7.90	1023.0
2	8.42	-50.64 59.18 370.80	-50 to -30 (endo) 30 to 210 (endo) 260 to 440 (endo)	7.65	1014.2

During the cooling phase no thermal effects were detected. During the heating phase a first endothermic effect was observed in the temperature range of -50 to -30 °C, which can be assigned to the melting of the test item. As the onset temperatures in both tests deviate by more than 0.5 K from their mean value of -49.76 °C, a melting range has to be specified. Therefore, the test item has a melting range of -51 to -49 °C at atmospheric pressure (1014 – 1023 hPa).

The test item showed a second endothermic signal in the temperature range of 30 – 210 °C, which could be assigned to the boiling of the test item.

In the temperature range of 260 – 440 °C a third endothermic effect was detected. This effect can probably be explained by decomposition of the test item.

Conclusions:

The melting range of the test item is -51 to -49 °C at atmospheric pressure.

Executive summary:

The test item has a melting range of -51 to -49 °C at atmospheric pressure (1014 – 1023 hPa) as determined in a GLP study by DSC according to EU Method A.1. and OECD Test Guideline 102.

Description of key information

The test item has a melting range of -51 to -49 °C at atmospheric pressure (1014 – 1023 hPa) as determined in a GLP study by DSC according to EU Method A.1. and OECD Test Guideline 102.

Key value for chemical safety assessment

Melting / freezing point at 101 325 Pa:

-51 °C