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Boiling point

Link to relevant study record(s)

Reference

Endpoint:

boiling 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 103 (Boiling Point)

Deviations:

no

Qualifier:

according to guideline

Guideline:

EU Method A.2 (Boiling Temperature)

Deviations:

no

GLP compliance:

yes (incl. QA statement)

Type of method:

differential scanning calorimetry

Key result

Boiling pt.:

111.8 °C

Atm. press.:

1 013 hPa

Decomposition:

yes

Decomp. temp.:

> 160 - < 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

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. For verification of the boiling behaviour of the test item, the photo cell detection method was performed. During the verification measurement it was observed that at 97 °C a first big bubble started to rise. At 111.6 °C the boiling criterion of the apparatus was reached with a frequency of 0.6 Hz (atmospheric pressure: 1008 hPa). At 120 °C the verification measurement was terminated. During the whole verification measurement, the test item was clear and colourless. Due to the fact that the BÜCHI Apparatus detected the boiling temperature very clearly, this temperature is used as boiling point of the test item. The automatically by the apparatus corrected boiling value is 111.8 °C. Therefore, the test item has a boiling point of 111.8 °C at standard pressure (1013 hPa).

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 boiling point of the test item is 111.8 °C.

Executive summary:

The test item has a boiling point of 111.8 °C at standard pressure (1013 hPa) as determined in a GLP study by DSC and confirmed by the photo cell detection method according to EU Method A.2. and OECD Test Guideline 103.

Description of key information

The test item has a boiling point of 111.8 °C at standard pressure (1013 hPa) as determined by DSC and confirmed in a GLP study by the photo cell detection method according to EU Method A.2. and OECD Test Guideline 103.

Key value for chemical safety assessment

Boiling point at 101 325 Pa:

111.8 °C