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Physical & Chemical properties

Melting point / freezing point

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Reference
Endpoint:
melting point/freezing point
Type of information:
experimental study
Adequacy of study:
key study
Study period:
04-January-2010 to 04-February-2010
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to
Guideline:
EU Method A.1 (Melting / Freezing Temperature)
Deviations:
no
Qualifier:
according to
Guideline:
OECD Guideline 102 (Melting point / Melting Range)
Deviations:
no
GLP compliance:
yes (incl. certificate)
Type of method:
other: Visual judgement
Key result
Melting / freezing pt.:
-68.3 °C
Decomposition:
no
Sublimation:
no
Remarks on result:
other: at ambient pressure

A preliminary test was performed to check the approximate freezing temperature of 2-ethylhexyl 4-methoxycinnamate . The test item was stored about 24 hours at -24 °C in a freezer. As the sample was not frozen after this time the freezing temperature of 2-ethylhexyl 4-methoxycinnamate is below -24 °C.

 

During the main tests, about 10 mL of the test item placed in a small test tube were cooled down from room temperature to about -70 °C using a dry ice and acetone mixture.

 

At 68.5 °C (1st test) and 68.0 °C (2nd test), respectively, the test item was frozen by visual judgement.

 

The results of the individual measurements are summarized in Table1 below:

Table1       Determination of the Freezing Point of 2-ethylhexyl 4-methoxycinnamate (Summary)

 

Freezing Point

[°C]

[K]

Preliminary test

Below -24

Below 249.2

1st main test

-68.5

204.7

2nd main test

-68.0

205.2

Mean value

-68.3

205.0

 

The mean freezing point was calculated from the bold values.

Conclusions:
The freezing point of Ethylhexyl Methoxycinnamate was determined to be -68.3 °C which is equal to 205.0 K by visual judgement.
Executive summary:

The aim of this study was to determine the freezing point/range of 2-ethylhexyl 4-methoxycinnamate. The freezing point of Ethylhexyl Methoxycinnamate was determined to be  -68.3 °C,  which is equal to 205.0 K. The estimated accuracy is ± 0.5 K.

Description of key information

Melting/freezing point: 205 K at ambient pressure (freezing point)

Key value for chemical safety assessment

Melting / freezing point at 101 325 Pa:
205 K

Additional information

The freezing point of Ethylhexyl Methoxycinnamate was determined to be 205 K at ambient pressure in a study according to OECD guideline 102 and EU Method A1 under GLP.