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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:
22 April to 14 June 2016
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to
Guideline:
EU Method A.2 (Boiling Temperature)
Qualifier:
according to
Guideline:
OECD Guideline 103 (Boiling Point)
Qualifier:
according to
Guideline:
EPA OPPTS 830.7220 (Boiling Point / Boiling Range)
GLP compliance:
no
Type of method:
differential scanning calorimetry
Key result
Boiling pt.:
235 °C
Atm. press.:
1 013.25 hPa
Decomposition:
no

Results

In the temperature range of -50 to -20 °C an endothermic effect (melting) was observed. Between approx. 120 - 260 °C a second endothermic effect (boiling) could be detected.

 

Results of the DSC-measurements

No.

Sample weight

[mg]

Onset of Effect

[°C]

Range of effect

[°C]

Weight loss [mg]

Atmospheric pressure

[hPa]

PN10938

15.74

-35.52

235.07

-50 to -20 (endo)

150 – 260 (endo)

15.66

1012

PN11246

17.46

-32.43

233.86

-50 to -20 (endo)

120 – 260 (endo)

17.38

987.3

 

During the cooling phase, an exothermal effect was observed in the temperature range of -60 to -70 °C, which can be assigned to the freezing of the test item. During the heating phase a distinct endothermic effect was observed in the temperature range of -50 to -20 °C, which can be assigned to the melting of the test item.

The test item showed a second endothermic signal in the temperature range of approx. 120 - 260 °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 2 (e.g. Hydrocarbons). A correction value φ = 5.0 was used for the temperature of 230 - 240 °C.

The lowest measured onset temperature is corrected to the standard pressure to be 235.0 °C and the highest onset temperature to be 235.12 °C. As the corrected onset temperatures in both tests deviate less than 0.5 K from their mean value of 235.06 °C, the test item has a boiling point of 235.0 °C.

No further thermal effects were observed up to the maximum test temperature of 500 °C.

 

Final Results

The test item has a boiling point of 235.0 °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 235.0 °C (at 1013 hPa) was determined for the test substance according to EU Method A.2

Description of key information

Boiling point: 235.0 °C at 1013 hPa (EU Method A.2, differential scanning calorimetry)

Key value for chemical safety assessment

Boiling point at 101 325 Pa:
235 °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.