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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:
2019
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to guideline
Guideline:
EU Method A.2 (Boiling Temperature)
Deviations:
no
Qualifier:
according to guideline
Guideline:
OECD Guideline 103 (Boiling Point)
Deviations:
no
GLP compliance:
no
Type of method:
differential scanning calorimetry
Key result
Boiling pt.:
335 °C
Atm. press.:
ca. 1 013.25 hPa
Decomposition:
no

Two DSC measurements showed an endothermal effect after the melting in the temperature range of 320 - 355 °C. The onset temperature (see Table 2) was derived from the intersection of the tangent line with the highest slope of the endothermal peak with the baseline. No further endothermic or exothermic effects were observed up to the final temperature (500°C and 400 °C). The mass loss after the DSC measurements amounted to 100%.

 

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

38345

11.86

25

500

320 - 355

334.63

Aluminium with a hole

Mass loss: 100 %

38364

9.54

25

400

320 - 355

335.64

Aluminium with a hole

Mass loss: 100 %

 

The test item had a boiling point at 335 °C after correction of the boiling point to standard atmospheric pressure (1013.3 hPa).

 

Conclusions:
The test item had a boiling point of 335 °C under atmospheric conditions.
Executive summary:

A study was conducted according to OECD test guideline 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 and the reference are heated up from the starting temperature to the final temperature at a constant heating rate in a defined atmosphere (nitrogen). Open crucibles are used as containers for the test item and as empty reference crucible. The quantity of heat absorbed or released is measured and recorded. The test item had a boiling point of 335 °C under atmospheric conditions.

Description of key information

The test item had a mean boiling point of 335 °C under atmospheric conditions.

Key value for chemical safety assessment

Boiling point at 101 325 Pa:
335 °C

Additional information

A study was conducted according to OECD test guideline 103 and Regulation (EC) No 440/2008 method A.2 to determine the boiling point of the test item using differential scanning calorimetry (DSC 25 - 500 °C). The test item and the reference are heated up from the starting temperature to the final temperature at a constant heating rate in a defined atmosphere (nitrogen). Open crucibles are used as containers for the test item and as empty reference crucible. The quantity of heat absorbed or released is measured and recorded. The test item had a boiling range of 335 °C under atmospheric conditions.