4-trans-(4-trans-Propylcyclohexyl)-cyclohexancarbonic acid

Boiling point

Link to relevant study record(s)

Reference

Endpoint:

boiling point

Type of information:

experimental study

Adequacy of study:

key study

Study period:

04.07.-02.10.2017

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.:

>= 355 - <= 420 °C

Atm. press.:

1 013 hPa

Decomposition:

yes

Decomp. temp.:

> 355 °C

Two DSC measurements in aluminium crucibles with a hole showed an endothermal effect after the melting in the temperature range of 355 - 420 °C. The onset temperature was derived from the intersection of the tangent line with the highest slope of the endothermal peak with the baseline. At approximately 430 °C an exothermal effect started (only first measurement, the second was terminated beforehand). The mass loss after the DSC measurements amounted to 86 % (second measurement).

Table 3: Boiling point (DSC measurement)

Ident No.	Test item / mg	Starting temperature / °C	Final test temperature / °C	Temperature range (endothermal) / °C	Onset (boiling) / °C	Crucible	Observations after the measurement
36553	15.56	25	500	360 - 420	364.24	Aluminium with a hole	---
36356	16.28	25	420	355 - 405	362.54	Aluminium with a hole	Test item was discoloured to brown. Mass loss: 86%

 

Under consideration of the results from the DSC measurements it was concluded that the test item boiled under decomposition within a range of 355 - 420 °C. The discolouration at 248.6 °C indicated decomposition before boiling took place.

Conclusions:

The test item boiled under decomposition within a range of 355 - 420°C under atmospheric conditions.

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 and the reference were weighed into an aluminium crucible under an inert atmosphere (nitrogen). The crucibles were heated from room temperature up to 500 °C at a constant heating rate. Two DSC measurements in aluminium crucibles with a hole showed an endothermal effect after the melting in the temperature range of 355 - 420 °C. At approximately 430 °C an exothermal effect started (only first measurement, the second was terminated beforehand). The mass loss after the DSC measurements amounted to 86 % (second measurement).

The discolouration at 248.6 °C indicated decomposition before boiling took place. Hence, the test item boiled under decomposition within a range of 355 - 420 °C under atmospheric conditions.

Description of key information

The substance boiled under decomposition within a range of 355 - 420°C under atmospheric conditions (reference 4.3-1).

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. The test item and the reference were weighed into an aluminium crucible under an inert atmosphere (nitrogen). The crucibles were heated from room temperature up to 500 °C at a constant heating rate. Two DSC measurements in aluminium crucibles with a hole showed an endothermal effect after the melting in the temperature range of 355 - 420 °C. At approximately 430 °C an exothermal effect started (only first measurement, the second was terminated beforehand). The mass loss after the DSC measurements amounted to 86 % (second measurement).

The discolouration at 248.6 °C indicated decomposition before boiling took place. Hence, the test item boiled under decomposition within a range of 355 - 420 °C under atmospheric conditions (reference 4.3-1).