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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:
2019-03-15 to 2019-03-18
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline 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.:
>= 228 - <= 230 °C
Atm. press.:
1 013.25 hPa
Decomposition:
no

Results of the DSC-measurements

No.

Sample
weight/
mg

Onset of
Effect/ °C

Range of effect

rc

Weight
loss/
mg

Atmospheric
pressure / hPa

PN17469

11.95

227.60

170 - 240 (endo)

11.95

992.9

PN17477

11.44

229.27

160 - 240 (endo)

1143

1006.1

 

During the subsequent heating phase, an endothermic effect was observed in the temperature range of 160 – 240 °C, which can be assigned to the boiling of the test item. For the correction of the boiling temperature to standard pressure the test item was assigned to chemical group 2 (e.g. Hydrocarbons/Esters). According to appendix 8.2 a correction valueφ= 5.0 was used for the temperature of 220 – 230 °C. The lowest measured onset temperature is corrected to the standard pressure to be 228.48 °C and the highest onset temperature to be 229.58 °C. As the corrected onset temperatures in both tests deviate by more than 0.5 K from their mean value of 229.03 °C, the test item has a boiling range of 228 °C – 230 °C. No further thermal effects were observed up to the maximum test temperature of 500 °C.

Conclusions:
The boiling range of the test item was determined to from 228 to 230 °C.
Executive summary:

A study was conducted according to OECD test guideline 103, 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 11 -12 mg of the test item were performed. As reference crucible, an empty aluminium crucible was used. At ambient conditions, the test item is a liquid. The temperature was increased up to 500 °C at a constant heating rate of 10 K/min. During the heating phase, an endothermic effect was observed in the temperature range of 160 – 240 °C, which was assigned to the boiling of the test item. The boiling point was corrected to normal pressure (1013.25 hPa) according to the Equation, table and figures of H.N. Hass and R.F. Newton. The lowest measured onset temperature is corrected to the standard pressure to be 228.48 °C and the highest onset temperature to be 229.58 °C. As the corrected onset temperatures in both tests deviate by more than 0.5 K from their mean value of 229.03 °C, the test item has a boiling range of 228 °C – 230 °C. No further thermal effects were observed up to the maximum test temperature of 500 °C.

Description of key information

The boiling range of the test item was determined to from  228 to 230 °C.

Key value for chemical safety assessment

Additional information

A study was conducted according to OECD test guideline 103, 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 11 -12 mg of the test item were performed. As reference crucible, an empty aluminium crucible was used. At ambient conditions, the test item is a liquid. The temperature was increased up to 500 °C at a constant heating rate of 10 K/min. During the heating phase, an endothermic effect was observed in the temperature range of 160 – 240 °C, which was assigned to the boiling of the test item. The boiling point was corrected to normal pressure (1013.25 hPa) according to the Equation, table and figures of H.N. Hass and R.F. Newton. The lowest measured onset temperature is corrected to the standard pressure to be 228.48 °C and the highest onset temperature to be 229.58 °C. As the corrected onset temperatures in both tests deviate by more than 0.5 K from their mean value of 229.03 °C, the test item has a boiling range of 228 °C – 230 °C. No further thermal effects were observed up to the maximum test temperature of 500 °C.