Reaction mass of (1S*, 2R*, 5S*)-2-Isopropenyl-5-methylcyclohexanol and (1S*, 2S*, 5R*)-2-Isopropenyl-5-methylcyclohexanol

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:

25 October to 15 November 2016

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Reason / purpose for cross-reference:

reference to same study

Qualifier:

according to guideline

Guideline:

EU Method A.1 (Melting / Freezing Temperature)

Qualifier:

according to guideline

Guideline:

OECD Guideline 102 (Melting point / Melting Range)

Qualifier:

according to guideline

Guideline:

EPA OPPTS 830.7200 (Melting Point / Melting Range)

Qualifier:

according to guideline

Guideline:

other: CIPAC MT 1 (2009): Freezing Point

GLP compliance:

no

Type of method:

differential scanning calorimetry

Key result

Melting / freezing pt.:

-69.5 °C

Atm. press.:

>= 1 007 - <= 1 015 hPa

Decomposition:

no

Results

In the temperature range of -70 to -40 °C, a very small endothermic effect (melting) was observed. Between approx. 110 - 230 °C a second endothermic effect (boiling) was observed. No further thermal effects were observed up to the test end temperature of 500 °C.

 

Results of the DSC-measurements

No.	Sample weight / mg	Onset of Effect / °C	Range of effect / °C	Weight loss / mg	Atmospheric pressure / hPa
PN12107	15.33	-69.51 212.11	-70 to -40 (endo) 110 - 230 (endo)	15.33	1007.3
PN12122	14.91	-69.50 212.10	-70 to -40 (endo) 120 - 230 (endo)	14.86	1015.2

 

During the cooling phase, no thermal effects were observed in the temperature range from -100 to 25 °C.

During the subsequent heating phase the test item showed a very small endothermic effect in the temperature range of -70 to -40 °C, which can be assigned with the melting of the test item. As the onset temperatures in both tests deviate by less than 0.5 K from their mean value of -69.51 °C, the test item has a melting point of -69.5 °C.

Due to the very small melting peak, the melting of the test item was verified. 3.0 g of the test item in a test tube were cooled down with liquid nitrogen to approx. -75 °C. In the temperature range of approx. -75 to -60 °C the test item was solid. The appearance of the test item during warming up: at approx. -50 °C very viscous, at -40 °C liquid. Therefore the melting point in the DSC-measurement was confirmed.

The test item showed a second endothermic signal in the temperature range of approx. 110 - 230 °C that can be assigned to the boiling of the test item.

 

Final Results

The test item has a melting point of -69.5 °C at atmospheric pressure (1007 hPa and 1015 hPa, respectively) as determined by differential scanning calorimetry according to Regulation EC No. 440/2008 Method A.1. and OECD Test Guideline 102 (1995).

Conclusions:

A melting point value of -69.5 °C (at 1007 hPa and 1015 hPa) was determined for the test substance according to E.U. Method A.1.

Description of key information

Melting point: -69.5 °C at 1007 hPa and 1015 hPa (EU Method A.1, differential scanning calorimetry)

Key value for chemical safety assessment

Melting / freezing point at 101 325 Pa:

-69.5 °C