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Boiling point

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Reference
Endpoint:
boiling point
Type of information:
experimental study
Adequacy of study:
key study
Study period:
20.06.2016 - 07.09.2016
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to
Guideline:
EU Method A.2 (Boiling Temperature)
Deviations:
no
Qualifier:
according to
Guideline:
OECD Guideline 103 (Boiling Point)
Deviations:
no
GLP compliance:
no
Type of method:
differential scanning calorimetry
Key result
Boiling pt.:
> 415 - < 480 °C
Atm. press.:
1 013.3 hPa
Decomposition:
yes

Two DSC measurements in aluminium crucibles with a hole showed an endothermal effect after the melting in the temperature range of 415 -418 °C. No further endothermic or exothermic effects were observed up to the final temperature (500 °C). The mass loss after the DSC measurements amounted to approx. 90 %.

Table 2: Boiling point (DSC measurement)

Ident No.

Test item mg

Starting temperature °C

Final test temperature °C

Temperature range (boiling) °C

Onset °C

Crucible

Observations after the measurement

35627

12.24

25

500

420 - 470

428.93

Aluminium with a hole

Black residue, mass loss: 10.85 mg

35629

13.92

25

500

415 - 480

426.55

Aluminium with a hole

Black residue, mass loss: 12.19 mg

After the measurements a black residue was observed and the mass loss was incomplete. The test item showed a behaviour plausible for boiling under decomposition in a temperature range of 415 - 480 °C.

Conclusions:
The test item boiled under decomposition in a temperature range of 415 - 480 °C.
Executive summary:

A study was conducted according to OECD TG 103 and Regulation (EC) No 440/2008 method A.2 to determine the boiling point of the test item using differential scanning calorimetry. The test item was weighed out into an aluminium crucible under an inert atmosphere (nitrogen). Two tests with about 12 - 14 mg of the test item were performed. The crucible was heated from room temperature to 500 °C with 10 K/min heating rate. Two DSC-runs in aluminium crucibles with a hole showed an endothermic effect after melting in the temperature range 415 - 418 °C with an onset temperature of approx. 430 °C. The colour of the test item changed in the course of the measurement to a black residue. From this fact and considering the result of the DSC-measurement in a closed glass crucible it can be concluded that the test item boiled under decomposition in the temperature range of approximately 415 - 480 °C.

Description of key information

The test item boiled under decomposition in a temperature range of 415 - 480 °C.

Key value for chemical safety assessment

Additional information

A study was conducted according to OECD TG 103 and Regulation (EC) No 440/2008 method A.2 to determine the boiling point of the test item using differential scanning calorimetry. The test item was weighed out into an aluminium crucible under an inert atmosphere (nitrogen). Two tests with about 12 - 14 mg of the test item were performed. The crucible was heated from room temperature to 500 °C with 10 K/min heating rate. Two DSC-runs in aluminium crucibles with a hole showed an endothermic effect after melting in the temperature range 415 - 418 °C with an onset temperature of approx. 430 °C. The colour of the test item changed in the course of the measurement to a black residue. From this fact and considering the result of the DSC-measurement in a closed glass crucible it can be concluded that the test item boiled under decomposition in the temperature range of approximately 415 - 480 °C (reference 4.3-1).