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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:
02-Sep-2014
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Reference:
Composition 1
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
Test material information:
Composition 1
Boiling pt.:
> 272 - < 274 °C
Atm. press.:
1 013 hPa

Results

In the thermograms of the two DSC runs (nos. PN7387 and PN7397) an endothermic (melting) effect was observed in the temperature range of - 10 °C to 25 °C. Between 155 - 310 °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)

PN7387

11.67

7.04

274.02

-5 to 20 (endo)

160 to 310 (endo)

11.55

1008.3

PN7397

10.59

6.83

272.18

-5 to 25 (endo)

160 to 320 (endo)

10.59

1008.5

 

The test item showed a second distinct endothermic signal in the temperature range of 155 to 320 °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 used for the temperature range from 270 °C to 280 °C.

The lowest measured onset temperature is corrected to the standard pressure to be 272.40 °C and the highest onset temperature to be 274.25 °C. As the corrected onset temperatures in both tests deviate by less than 0.5 K from their mean value of 273.33 °C, the test item has a boiling range from 272 to 274 °C.

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

Final Results

The test item [trade name] has a boiling point of 272 to 274 °C at atmospheric pressure (1013 hPa) as determined by differential scanning calorimetry according to Directive EC440/2008 Method A.2., OECD Test Guideline 103 (1995), EPA OCSPP 830.7220 (1998).

Conclusions:
A boiling point of 272 to 274 °C (at 1013 hPa) was determined for the test substance according to E.U. Method A.2.

Description of key information

Boiling point: 272 to 274 °C at 1013 hPa (EU Method A.2, differential scanning calorimetry)

Key value for chemical safety assessment

Additional information

A boiling point of 272 to 274 °C (at 1013 hPa) was determined for the test substance according to E.U. Method A.2.