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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:
01 to 03 June 2016
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to guideline
Guideline:
OECD Guideline 103 (Boiling Point)
Qualifier:
according to guideline
Guideline:
EU Method A.2 (Boiling Temperature)
Qualifier:
according to guideline
Guideline:
other: EPA OCSPP Test Guideline 830.7220 (1996) Boiling Point / Boiling Range
GLP compliance:
no
Type of method:
differential scanning calorimetry
Key result
Boiling pt.:
255.1 °C
Atm. press.:
1 013.25 hPa

Results

In the temperature range of 80 – 290 °C, an endothermic effect (boiling) was observed. No further thermal effects were observed up to the test end temperature of 500 °C.

 

Results of the DSC-measurements

No.

Sample weight / mg

Onset of Effect / °C

Range of effect / °C

Weight loss / mg

Atmospheric pressure / hPa

PN11183

25.59

254.90

80 – 290 (endo)

25.51

1000.6

PN11186

21.04

254.01

100 – 290 (endo)

21.03

997.7

 

During the heating phase the test item showed an endothermic signal in the temperature range of approx. 80 – 290 °C that 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 3 (e.g. Esters). A correction value φ = 5.35 was used for the temperature of 250 – 260 °C.

The lowest measured onset temperature is corrected to the standard pressure to be 254.68 °C and the highest onset temperature to be 255.44 °C. As the corrected onset temperatures in both tests deviate less than 0.5 K from their mean value of 255.06 °C, the test item has a boiling point of 255.1 °C.

 

Final Results

The test item has a boiling point of 255.1 °C corrected to normal atmospheric pressure (1013 hPa) as determined by differential scanning calorimetry according to Regulation EC No. 440/2008 Method A.2. and OECD Test Guideline 103 (1995).

Conclusions:
A boiling point of 255.1 °C (at 1013 hPa) was determined for the test substance according to EU Method A.2

Description of key information

Boiling point: 255.1 °C at 1013 hPa (EU Method A.2, differential scanning calorimetry)

Key value for chemical safety assessment

Boiling point at 101 325 Pa:
255.1 °C

Additional information

The boiling point has been corrected to normal pressure (1013.25 hPa) using the H.N. Hass and R.F. Newton equation.