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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:
24.04.2015
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to
Guideline:
EU Method A.2 (Boiling Temperature)
Deviations:
no
GLP compliance:
no
Type of method:
differential scanning calorimetry
Key result
Boiling pt.:
390 °C
Atm. press.:
1 013 hPa
Decomposition:
no

Boiling point / boiling range: DSC measurement

Two DSC measurements with a heating rate of 10 K/min in aluminium crucibles with a hole showed an endothermal effect after the melting in the temperature range of 375 - 405 °C with onset temperatures of 390.13 °C and 389.63 °C, respectively. No further endothermic or exothermic effects were observed up to the final temperature (500 °C). The mass loss after the DSC measurements amounted to 100 %

 

 

Ident No.

Test item / mg

Starting temperature /

°C

Final test temperature /

°C

Temperature range (boiling) / °C

Onset / °C

Crucible

Observations

35000

12.62

25

500

375 - 405

390.13

Aluminium with a hole

Mass loss 100%

35003

9.76

25

500

380 - 405

389.63

Aluminium with a hole

Mass loss 100%

For the correction delta t of the boiling point to standard atmospheric pressure (1013.3 hPa) the equation, table and graphs of H.B. Hass and R.F. Newton in "CRC Handbook of Chemistry and Physics, 74th ed. 1993-1994", pages 15-16 and 15-17 were used.

Conclusions:
A boiling point of the test item of 390.2 °C corrected to normal atmospheric pressure was determined.
Executive summary:

A study was conducted according to 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 10 – 13 mg of the test item were performed. As reference crucible, an empty aluminium crucible was used. The substance is a solid at ambient conditions. Two DSC measurements with a heating rate of 10 K/min in aluminium crucibles with a hole showed an endothermal effect after the melting in the temperature range of 375 - 405 °C with onset temperatures of 390.13 °C and 389.63 °C, respectively. No further endothermic or exothermic effects were observed up to the final temperature (500 °C). The mass loss after the DSC measurements amounted to 100 %

The correction of the boiling temperature to standard pressure was performed according to H.N. Hass and R.F. Newton. A boiling point of the test item of 390.2 °C corrected to normal atmospheric pressure was determined.

Description of key information

A boiling point of the test item of 390.2 °C corrected to normal atmospheric pressure was determined.

Key value for chemical safety assessment

Boiling point at 101 325 Pa:
390.2 °C

Additional information

A study was conducted according to 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 10 – 13 mg of the test item were performed. As reference crucible, an empty aluminium crucible was used. The substance is a solid at ambient conditions. Two DSC measurements with a heating rate of 10 K/min in aluminium crucibles with a hole showed an endothermal effect after the melting in the temperature range of 375 - 405 °C with onset temperatures of 390.13 °C and 389.63 °C, respectively. No further endothermic or exothermic effects were observed up to the final temperature (500 °C). The mass loss after the DSC measurements amounted to 100 %

The correction of the boiling temperature to standard pressure was performed according to H.N. Hass and R.F. Newton. A boiling point of the test item of 390.2 °C corrected to normal atmospheric pressure was determined.