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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:
2018-09-25 to 2018-09-27
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to guideline
Guideline:
OECD Guideline 103 (Boiling Point)
Deviations:
no
Qualifier:
according to guideline
Guideline:
EU Method A.2 (Boiling Temperature)
Deviations:
no
Qualifier:
according to guideline
Guideline:
EPA OPPTS 830.7220 (Boiling Point / Boiling Range)
Deviations:
no
GLP compliance:
no
Type of method:
differential scanning calorimetry
Key result
Boiling pt.:
> 326 - < 329 °C
Atm. press.:
1 013.25 hPa
Decomposition:
no

Boiling point / boiling range: DSC measurement

Two DSC measurements in aluminium crucibles with a hole showed an endothermal effect after the melting in the temperature range of 310 - 345 °C. The onset temperature was derived from the intersection of the tangent line with the highest slope of the endothermal peak with the baseline. No further endothermic or exothermic effects were observed up to the final temperature (500 °C). The mass loss after the DSC measurements amounted to 100 %.

 

Ident

Test
item /
mg

Starting
temperature /

m

Final test
temperature /

°C

Temperature
range (endo-
thermal) /

°C

Onset
(boiling) /
°C

Crucible

Observations

after the
measurement

38210

15.70

25

500

310-345

328.98

Aluminium
with a hole

Mass loss
100%

38215

15.51

25

500

310-345

326.80

Aluminium
with a hole

Mass loss
100 %

 

Conclusions:
The boiling point of the test item was determined to be in a range of 326 - 329 °C.
Executive summary:

A study was conducted according to OECD TG 103 and Regulation (EC) No 440/2008 method A.2 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 (nitrogen). Two tests with about 15 – 16 mg of the test item were performed. As reference crucible, an empty aluminium crucible was used. Two DSC measurements in aluminium crucibles with a hole showed an endothermal effect after the melting in the temperature range of 310 - 345 °C. No further endothermic or exothermic effects were observed up to the final temperature (500 °C). The mass loss after the DSC measurements amounted to 100 %. The boiling point of the test item was determined to be in a range of 326 - 329 °C at 1013.3 hPa.

Description of key information

The boiling point of the test item was determined to be in a range of 326 - 329 °C.

Key value for chemical safety assessment

Additional information

A study was conducted according to OECD TG 103 and Regulation (EC) No 440/2008 method A.2 to determine the boiling point of the test item using differential scanning calorimetry (reference 4.3 -1). The test item was weighed out into an aluminium crucible under an inert atmosphere (nitrogen). Two tests with about 15 – 16 mg of the test item were performed. As reference crucible, an empty aluminium crucible was used. Two DSC measurements in aluminium crucibles with a hole showed an endothermal effect after the melting in the temperature range of 310 - 345 °C. No further endothermic or exothermic effects were observed up to the final temperature (500 °C). The mass loss after the DSC measurements amounted to 100 %. The boiling point of the test item was determined to be in a range of 326 - 329 °C at 1013.3 hPa.

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