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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:
27-Jan to 29-Mar-2016
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Reason / purpose:
reference to same study
Reason / purpose:
reference to same 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.:
> 187 - < 188 °C
Atm. press.:
1 013 hPa

Results

The thermograms of the DSC runs PN10412 and PN10436 show in the temperature range of 100 – 180 °C an exothermic effect was observed with an energy of approx. -90 J/g directly followed by an endothermic effect (boiling) in the temperature range of 180 – 250 °C. In the temperature range of 250 – 420 °C a further exothermic effect could be detected with an energy of approx. -160 J/g.

Results of the DSC measurements

No.

 

Sample weight (mg)

Onset of effect (°C)

Range of effect (°C)

Weight loss (mg)

Atmospheric pressure (hPa)

PN10412

16.02

187.41

100 to 180 (exo)

180 to 250 (endo)

250 to 420 (exo)

0.16

1006.4

PN10436

14.73

186.62

100 to 180 (exo)

180 to 250 (endo)

250 to 410 (exo)

14.40

1014.4

 

During the heating phase an endothermic effect (boiling) in the temperature range of 180 – 250 °C was observed. In the temperature range of 250 – 420 °C a further exothermic effect could be detected.

For the correction of the boiling temperature to standard pressure the test item was assigned to chemical group 3 (e.g. Aldehyde). A correction value φ = 5.15 was used for the temperature of 180 - 190 °C.

The lowest measured onset temperature is corrected to the standard pressure to be 186.57 °C and the highest onset temperature to be 187.67 °C. As the corrected onset temperatures in both tests deviate by less than 0.5 K from their mean value of 187.12 °C, the test item has a boiling point of 187 - 188 °C.

The verification of the exothermic effect in the DSC (100 – 180 °C) with the capillary method showed that the test item was unchanged until the boiling of the test item at approx. 190 °C.

Final Results

The test item has a boiling point of 187 - 188 °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 187 - 188 °C (at 1013 hPa) was determined for the test substance according to E.U. Method A.2.

Description of key information

Boiling point: 187 - 188 °C at 1013 hPa (EU Method A.2., differential scanning calorimetry)

Key value for chemical safety assessment

Additional information