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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:
21-Aug-2014
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/boiling range)
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.:
276.1 °C
Atm. press.:
1 013 hPa

Results

In the thermograms of the two DSC runs (nos. PN7334 and PN7336) an endothermic effect (melting) was observed in the temperature range of 30 – 60 °C. Between 150 - 290 °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)

Remark

PN7334

13.22

36.39

275.42

30-60 (endo)

150-029 (endo)

13.17

1005.5

Figure 1

PN7336

11.99

36.48

276.04

30-60 (endo)

150-029 (endo)

11.92

1005.0

Figure 2

 

The test item showed a second distinct endothermic signal in the temperature range of 150 -290 °C that can be associated with 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 (eg. hydrocarbons). A correction value φ = 5.1 was applied for the temperature range from 260 - 290 °C.

The lowest measured onset temperature, corrected to standard pressure, was 275.78 °C. The highest onset temperature, corrected to standard pressure, was 276.42 °C. As the corrected onset temperatures in both tests deviate by less than 0.5 K from their mean value of 276.10 °C, the test item has a boiling point of 276.1 °C.

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

Final Results

The test item has a boiling point of 276.1 °C at atmospheric pressure (1013 hPa) as determined by differential scanning calorimetry according to Directive EC40/2008 Method A.2., OECD Test Guideline 103 (1995), EPA OCSPP 830.7220 (1998).

 

Conclusions:
A boiling point of value 276.1 °C (at 1013 hPa) was determined for the test substance according to E.U. Method A.2.

Description of key information

Boiling point: 276.1 °C at 1013 hPa (EU Method A.2, differential scanning calorimetry)

Key value for chemical safety assessment

Boiling point at 101 325 Pa:
276.1 °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.