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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:
From May 26, 2010 to August 10, 2010
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
other: Study conducted according to the OECD 103 Guideline and the EU A.2 method, under GLP without deviation and with certificate of analysis included.
Reason / purpose:
reference to same study
Qualifier:
according to
Guideline:
OECD Guideline 103 (Boiling point/boiling range)
Deviations:
no
Qualifier:
according to
Guideline:
EU Method A.2 (Boiling Temperature)
Deviations:
no
GLP compliance:
yes (incl. certificate)
Type of method:
method according to Siwoloboff
Key result
Boiling pt.:
278.7 °C
Atm. press.:
101.325 kPa
Decomposition:
yes
Remarks on result:
other: Corrected value at standard pressure

Pre-test results:

The compound showed formation of bubbles at approx. 225°C.

Main study results:

The boiling point was measured twice. Then, the boiling temperature at standard pressure was calculated following the Sidney-young equation  Tn = T + (f*Dp) with

Tn = boiling point at 101.325 kPa in K
T = measured boiling point in K
f = tabulated value

Dp = (101.325 – p) kPa
p = measured atmospheric pressure in kPa.

Results are given in the following table :

 Determination Boiling point (measured)  Pressure in kPa  Boiling point (corrected) 
First  277.9 °C (551.1 K)  99.847 278.6 °C (551.8 K) 
Second  278.0 °C (551.2 K)  99.861 278.7 °C (551.9 K) 
Mean  278.0 °C (551.2 K)  not applicable  278.7 °C (551.8 K) 

The two boiling points showed a difference of 0.1 K (original values and values calculated using the equation of Sidney-Young), lying within the demanded limit of 0.5 K.

Conclusions:
The boiling temperature at standard pressure (101.325 kPa) is stated as 278.7 °C ; this value was calculated following the Sidney-Young equation.
Executive summary:

The boiling point was measured twice according to Siwoloboff method (277.9 °C at 99.847 kPa and 278.0 °C at 99.861 kPa).

From these results, the boiling temperature at standard pressure (101.325 kPa) was calculated with the Sidney-Young equation as 278.7 °C.

No observations were made which might cause doubts on the validity of the study outcome, so result was considered as valid.

Description of key information

The boiling point was measured twice according to Siwoloboff method (277.9 °C at 99.847 kPa and 278.0 °C at 99.861 kPa).
From these results, the boiling temperature at standard pressure (101.325 kPa) was calculated with the Sidney-Young equation as 278.7 °C.

Key value for chemical safety assessment

Boiling point at 101 325 Pa:
278.7 °C

Additional information

Key study conducted according to the OECD 103 Guideline and the EU A.2 method, under GLP without deviation and with certificate of analysis included. Therefore, a reliability of 1 is assigned and the result of this key study is proposed as the end point value.