1-propyl-4-[(trans,trans)-4'-propyl[1,1'-bicyclohexyl]-4-yl]-benzene

Melting point / freezing point

Link to relevant study record(s)

Reference

Endpoint:

melting point/freezing point

Type of information:

experimental study

Adequacy of study:

key study

Study period:

July 02, 2015 - July 06, 2015

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

EU Method A.1 (Melting / Freezing Temperature)

Deviations:

no

Qualifier:

according to guideline

Guideline:

OECD Guideline 102 (Melting point / Melting Range)

Deviations:

no

GLP compliance:

no

Type of method:

differential scanning calorimetry

Key result

Melting / freezing pt.:

179.2 °C

Atm. press.:

ca. 1 013.25 hPa

Decomposition:

no

Three DSC measurements in aluminium crucibles with a hole showed an endothermal effect (melting) in the temperature range of 175 - 250°C with onset temperatures of 179.15°C, 179.28°C and 179.24°C, respectively. The onset temperature (see Table 1) was derived from the intersection of the tangent line with the highest slope of the endothermal peak with the baseline.

 

Melting point (DSC measurements)

Ident No.	Test item/ mg	Starting temperature / °C	Final test temperature / °C	Temperature range (melting) /°C	Onset / °C	Crucible	Observations after the measurement
35137	6.03	25	500	175 - 195	179.15	Aluminium with a hole	The crucible was empty after the measurement.
35139	10.71	25	500	175 - 205	179.28	Aluminium with a hole	The crucible was empty after the measurement.
35149	10.00	25	250	175 - 195	179.24	Aluminium with a hole	The item was a solidified melt after the measurement.

 

The test item had a melting point of 179.2°C.

 

 

Conclusions:

The DSC measurements (25 - 500 °C) showed that the test item had a melting point of 179.2 °C.

Executive summary:

A study was conducted according to OECD test guideline 102, Regulation (EC) No 440/2008 method A.1. The melting range was determined by differential scanning calorimetry (DSC 25-500 °C). The test item and the reference are heated up from the starting temperature to the final temperature at a constant heating rate in a defined atmosphere (nitrogen). Open crucibles are used as containers for the test item and as empty reference crucible. The quantity of heat absorbed or released is measured and recorded. The DSC measurements (25 - 500°C) showed that the test item had a melting point of 179.2°C under atmospheric conditions.

Description of key information

The test item had a melting point of  179.2 °C.

Key value for chemical safety assessment

Melting / freezing point at 101 325 Pa:

179.2 °C

Additional information

A study was conducted according to OECD test guideline 102, Regulation (EC) No 440/2008 method A.1. The melting point / melting range was determined by differential scanning calorimetry (DSC). The test item and the reference are heated up from the starting temperature to the final temperature at a constant heating rate in a defined atmosphere (nitrogen). Open crucibles are used as containers for the test item and as empty reference crucible. The quantity of heat absorbed or released is measured and recorded. The test item had a melting point of approx. 179.2 °C.