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Physical & Chemical properties

Boiling point

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Reference
Endpoint:
boiling point
Type of information:
experimental study
Adequacy of study:
key study
Study period:
from 2017-02-21 to 2017-03-16
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to
Guideline:
OECD Guideline 103 (Boiling Point)
Deviations:
no
Qualifier:
according to
Guideline:
EU Method A.2 (Boiling Temperature)
Deviations:
no
Qualifier:
according to
Guideline:
EPA OPPTS 830.7220 (Boiling Point / Boiling Range)
Deviations:
no
GLP compliance:
no
Remarks:
The study was conducted under supervision of a quality assurance unit which had ensured e.g instrumentation validation, reagent/materials certification, analyst certification and providing standard operating procedures.
Type of method:
differential scanning calorimetry
Key result
Boiling pt.:
171.8 °C
Atm. press.:
1 013 hPa
Decomposition:
no

The test item showed an endothermic signal in the temperature range of approx. 90 – 190 °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 = 4.9 was used for the temperature of 170 – 180 °C. The lowest measured onset temperature is corrected to the standard pressure to be 171.80 °C and the highest onset temperature to be 171.81 °C. As the corrected onset temperatures in both tests deviate by less than 0.5 K from their mean value of 171.81 °C, the test item has a boiling point of 171.8 °C.

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

 

Run No.

Sample weight (mg)

Onset of Effect (°C)

Range of effect (°C)

Weight loss (mg)

Atmospheric pressure (hPa)

PN12868

16.45

171.42

90 – 190 (endo)

16.45

1003.3

PN12884

15.24

171.18

100 – 190 (endo)

15.24

997.3

 

Conclusions:
The boiling point of the test item was determined to be 171.8 °C at 1013 hPa.
Executive summary:

A study was conducted according to OECD test guideline 103, Regulation (EC) No 440/2008 method A.2 and EPA OCSPP test guideline 830.7220 to determine the boiling point of the test item using differential scanning calorimetry. The test item was weighed out into an aluminium crucible under an inert atmosphere. Two tests with about 15 – 16 mg of the test item were performed. As reference crucible, an empty aluminium crucible was used. The substance is a liquid at ambient conditions. Therefore the crucibles were cooled down from ambient temperature to -100 °C with a constant cooling rate of 0.25 K/min under an inert atmosphere. After a waiting period of 30 min at -100 °C, the temperature was increased up to 500 °C at a constant heating rate of 10 K/min. Between approx. 90 – 190 °C, an endothermic effect (boiling) was detected. The correction of the boiling temperature to standard pressure was performed according to H.N. Hass and R.F. Newton. A boiling point of the test item of 171.8 °C corrected to normal atmospheric pressure was determined. No further thermal effects were observed up to the maximum test temperature of 500 °C.

Description of key information

The boiling point of the test item was determined to be 171.8 °C at 1013 hPa.

Key value for chemical safety assessment

Boiling point at 101 325 Pa:
171.8 °C

Additional information

A study was conducted according to OECD test guideline 103, Regulation (EC) No 440/2008 method A.2 and EPA OCSPP test guideline 830.7220 to determine the boiling point of the test item using differential scanning calorimetry. The test item was weighed out into an aluminium crucible under an inert atmosphere. Two tests with about 15 – 16 mg of the test item were performed. As reference crucible, an empty aluminium crucible was used. The substance is a liquid at ambient conditions. Therefore the crucibles were cooled down from ambient temperature to -100 °C with a constant cooling rate of 0.25 K/min under an inert atmosphere. After a waiting period of 30 min at -100 °C, the temperature was increased up to 500 °C at a constant heating rate of 10 K/min. Between approx. 90 – 190 °C, an endothermic effect (boiling) was detected. The correction of the boiling temperature to standard pressure was performed according to H.N. Hass and R.F. Newton. A boiling point of the test item of 171.8 °C corrected to normal atmospheric pressure was determined. No further thermal effects were observed up to the maximum test temperature of 500 °C.