3-Butoxy-7-ethoxy-4,6-difluoro-dibenzothiophene

Boiling point

Link to relevant study record(s)

Reference

Endpoint:

boiling point

Type of information:

experimental study

Adequacy of study:

key study

Study period:

2018-11-20

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

GLP compliance:

no

Type of method:

differential scanning calorimetry

Key result

Boiling pt.:

>= 370 - <= 445 °C

Atm. press.:

1 013.25 hPa

Decomposition:

yes

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 370 - 445 °C. The onset temperature was derived from the intersectíon of the tangent line with the highest slope of the endothermal peak with the baseline. The mass loss after the DSC measurements amounted to approximately 92 %.

 

Table 1: Boiling point (DSC measurement)

Ident No.	Test item / mg	Starting temperature /	Final test temperature / °C	Temperature range (endo- thermal) / °C	Onset (boiling) / °C	Crucible	Observations after the measurement
38369	9.44	25	500	370 - 440	388.79	Aluminium with a hole	Mass loss: 92%
38370	12.72	25	500	380 - 445	400.86	Aluminium with a hole	Mass loss: 92%

 

The test item had a boiling range of 370 – 445°C under atmospheric conditions. The test item boiled

under decomposition.

Conclusions:

The test item boiled under decomposition in the range of 370 to 445 °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 9 – 13 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 370 - 445 °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 92 %. The boiling point under decomposition of the test item was determined to be in a range of 326 - 329 °C at 1013.3 hPa.

Description of key information

The test item boiled under decomposition in the range of 370 to 445 °C.

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 9 – 13 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 370 - 445 °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 92 %. The boiling point under decomposition of the test item was determined to be in a range of 370 - 445 °C at 1013.3 hPa.