4-[4-(3,4-Difluorophenyl)-cyclohexyl]-cyclohexanone

Boiling point

Link to relevant study record(s)

Reference

Endpoint:

boiling point

Type of information:

experimental study

Adequacy of study:

key study

Study period:

29.04. - 03.07.02

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

OECD Guideline 103 (Boiling Point)

Deviations:

no

GLP compliance:

yes (incl. QA statement)

Type of method:

differential scanning calorimetry

Key result

Boiling pt.:

> 340 - < 410 °C

Atm. press.:

1 013.3 hPa

Decomposition:

no

The measurements for the test substance (without degassing) showed an endothermic effect in the temperature range 300 - 400 °C with an onset of 376 and 363 °C, respectively. For the degassed test substance an endothermic effect in the temperature range 320 – 430 °C with an onset of 408 °C was observed.

 

Ident-No.	Onset / °C	Temperature range / °C	Crucible
14513	375.63	300 - 400	Open glass crucible, under nitrogen
14517	362.79	300 - 400	Open glass crucible, under nitrogen
14616	407.92	320 - 430	Open glass crucible, under nitrogen

 

For the correction At of the boiling point to standard atmospheric pressure (1013,3hPa) the equation, table and graphs of H.B. Hass and R.F. Newton in „CRC Handbook of Chemistry and Physics, 74th ed. 1993-1994", pages 15-16 and 15-17 were used. For the estimation of & the test substance was classified in group 2 (Hydrocarbons) according to the table of H.B Hass and R.F. Newton.

 

Onset/°C	Atmospheric pressure / hPa		t/°C	Boiling point at 1013,3 hPa/ °C
375.63	995	5.31	+0.96	376.6
362.79	994	5.29	+1.00	363.8
407.92	1012	5.38	+0.07	408.0

 

Due to the broad and unclear peak of the boiling point in the DSC measurement the boiling point was checked with the capillary method (Fa. Buchi, model: B-540). Also with this method no unambiguous boiling point was observed. The temperature when a continuous chain of bubbles were observed varied between 340 and 370 °C for the test substance without degassing and between 395 and 410 °C for the degassed test substance. This temperature range corresponds to peaks of the endothermic signal of the DSC measurements. According to these results a boiling range of the test substance at atmospheric pressure (1013.3 hPa) of 340 - 410 °C will be given as final result.

Conclusions:

The boiling range of the test substance at atmospheric pressure (1013.3 hPa) was determined to be 340 - 410°C.

Executive summary:

A study was conducted according to OECD test guideline 103, Regulation (EC) No 440/2008 method A.2 and to determine the boiling point of the test item using differential scanning calorimetry. The determination of the boiling point was carried out by differential scanning calorimetry (DSC) under nitrogen in an open glass crucible (Heating rate: 3 and 10 K/min). Samples of the test substance of about 14 mg were used. The measurements for the test substance (without degassing) showed an endothermic effect in the temperature range 300 - 400 °C with an onset of 376 and 363 °C, respectively. For the degassed test substance an endothermic effect in the temperature range 320 – 430 °C with an onset of 408 °C was observed.Due to the broad and unclear peak of the boiling point in the DSC measurement the boiling point was checked with the capillary method. Also with this method no unambiguous boiling point was observed. The temperature when a continuous chain of bubbles were observed varied between 340 and 370 °C for the test substance without degassing and between 395 and 410 °C for the degassed test substance. This temperature range corresponds to peaks of the endothermic signal of the DSC measurements. According to these results a boiling range of the test substance at atmospheric pressure (1013.3 hPa) of 340 - 410 °C was determined.

Description of key information

The boiling range of the test substance at atmospheric pressure (1013.3 hPa) was determined to be  340 - 410°C (reference 4.3 -1).

Additional information

A study was conducted according to OECD test guideline 103, Regulation (EC) No 440/2008 method A.2 and to determine the boiling point of the test item using differential scanning calorimetry. The determination of the boiling point was carried out by differential scanning calorimetry (DSC) under nitrogen in an open glass crucible (Heating rate: 3 and 10 K/min). Samples of the test substance of about 14 mg were used. The measurements for the test substance (without degassing) showed an endothermic effect in the temperature range 300 - 400 °C with an onset of 376 and 363 °C, respectively. For the degassed test substance an endothermic effect in the temperature range 320 – 430 °C with an onset of 408 °C was observed.Due to the broad and unclear peak of the boiling point in the DSC measurement the boiling point was checked with the capillary method. Also with this method no unambiguous boiling point was observed. The temperature when a continuous chain of bubbles were observed varied between 340 and 370 °C for the test substance without degassing and between 395 and 410 °C for the degassed test substance. This temperature range corresponds to peaks of the endothermic signal of the DSC measurements. According to these results a boiling range of the test substance at atmospheric pressure (1013.3 hPa) of 340 - 410 °C was determined.