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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:
from 2017-11-15 to 2017-11-17
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Reference:
Composition 0
Qualifier:
according to
Guideline:
OECD Guideline 102 (Melting point / Melting Range)
Deviations:
no
Qualifier:
according to
Guideline:
EU Method A.1 (Melting / Freezing Temperature)
Deviations:
no
Qualifier:
according to
Guideline:
EPA OPPTS 830.7200 (Melting Point / Melting Range)
Deviations:
no
GLP compliance:
yes (incl. certificate)
Type of method:
capillary method
Test material information:
Composition 1
Key result
Melting / freezing pt.:
79 °C
Atm. press.:
1 013 hPa
Decomposition:
no
Sublimation:
no

Appearance of the Samples

Before the test the appearance of the test item was a white crystalline solid. After the experiments the test item became colorless liquid.

Results

During the preliminary test using a linear heating rate of 10 °C/min the phase transition of test item was observed at 78 °C. In the main test using a linear heating rate of 0.5 °C/min the melting point of the test item was determined to be 79.0 °C (352.2 K).

Table 1:Measured temperatures corresponding to the melting point of Test Item (two experiments (I, II) with three parallel samples each (1, 2, 3))

Sample

Temperature (°C)

Mean (°C)

Standard Deviation

Confidence interval (95 %)

I /1

78.8

79.0

0.17

0.18

I /2

79.2

I /3

78.9

II /1

78.9

II /2

79.2

II /3

79.0

 

Conclusions:
The melting point of the test item was determined with capillary method to be 79 °C.
Executive summary:

A study was conducted according to OECD TG 102, Regulation (EC) No. 440/2008 method A.1 and EPA OPPTS 830.7200 to determine the melting point of the test item using the capillary method. In a preliminary test using a linear heating rate of 10 °C/min the phase transition of the test item was observed at 78 °C. For the main test, a small amount of test item was charged in capillary glass tubes and packed tightly to obtain a filling level of approximately 5 mm. Three capillaries were prepared. Heating was was applied with temperature rise of 0.5 °C/min. The melting point of the test item was determined to be 79 °C at 1013.25 hPa

Description of key information

The melting point of the test item was determined with capillary method to be 79 °C.

Key value for chemical safety assessment

Melting / freezing point at 101 325 Pa:
79 °C

Additional information

A study was conducted according to OECD TG 102, Regulation (EC) No. 440/2008 method A.1 and EPA OPPTS 830.7200 to determine the melting point of the test item using the capillary method. In a preliminary test using a linear heating rate of 10 °C/min the phase transition of the test item was observed at 78 °C. For the main test, a small amount of test item was charged in capillary glass tubes and packed tightly to obtain a filling level of approximately 5 mm. Three capillaries were prepared. Heating was was applied with temperature rise of 0.5 °C/min. The melting point of the test item was determined to be 79 °C at 1013.25 hPa