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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:
March 16, 2018 - May 29, 2018
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Reason / purpose:
reference to same study
Qualifier:
according to
Guideline:
OECD Guideline 103 (Boiling Point)
Deviations:
no
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.:
351.2 °C
Atm. press.:
1 013.3 hPa
Decomposition:
no

Two DSC measurements in aluminium crucibles with a hole showed an endothermal effect after the melting in the temperature range of 340 - 380 °C. The onset temperature 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). The mass loss after the DSC measurements amounted to 100 %.

Table 1: Boiling point (DSC measurement)

 

Ident

No.

 

Test item / mg

 

Starting temperature /°C

 

Final test temperature / °C

 

Temperature range (endothermal)/°C

 

Onset (boiling) /°C

 Crucible  

Observations

after the

measurement

36879 16.19 25 500 350 - 380 350.50  

Aluminium

with a hole

 

Mass loss:

100%

36882 16.55 25 500 340 - 375 350.00

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.

Table 2: Correction of the boiling point to standard atmospheric pressure

  

Ident

No.

 Onset / °C

 

Ambient pressure /hPa

Phi (Group 2)

 delta t / ° C

 

Boiling point at

1013.3 hPa/°C

36879

350.50 

994.0

5.264

0.99

351.48

36882 

350.00

994.0

5.263

0.92

350.92

The remaining test item had a mean boiling point at atmospheric pressure (1013.3 hPa) of 351.2 °C.

Conclusions:
The test item had a mean boiling point at atmospheric pressure (1013.3 hPa) of 351.2 °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. Two DSC measurements in aluminium crucibles with a hole showed an endothermal effect after the melting in the temperature range of 340 - 380 °C. The onset temperature 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). The mass loss after the DSC measurements amounted to 100 %. The test item had a mean boiling point at atmospheric pressure (1013.3 hPa) of 351.2 °C.

Description of key information

The test item had a mean boiling point at atmospheric pressure (1013.3 hPa) of 351.2 °C.

Key value for chemical safety assessment

Boiling point at 101 325 Pa:
351.2 °C

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. Two DSC measurements in aluminium crucibles with a hole showed an endothermal effect after the melting in the temperature range of 340 - 380 °C. The onset temperature 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). The mass loss after the DSC measurements amounted to 100 %. The test item had a mean boiling point at atmospheric pressure (1013.3 hPa) of 351.2 °C (reference 4.3 -1).