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Physical & Chemical properties

Melting point / freezing point

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Reference
Endpoint:
melting point/freezing point
Remarks:
melting point
Type of information:
experimental study
Adequacy of study:
key study
Study period:
December 1, 2016 - December 28/29, 2016
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to guideline
Guideline:
OECD Guideline 102 (Melting point / Melting Range)
Deviations:
no
Qualifier:
according to guideline
Guideline:
EU Method A.1 (Melting / Freezing Temperature)
Deviations:
no
GLP compliance:
yes (incl. QA statement)
Type of method:
capillary method
Specific details on test material used for the study:
TREATMENT OF TEST MATERIAL PRIOR TO TESTING
- Treatment of test material prior to testing: a dried substance sample was finely ground before testing.
Key result
Melting / freezing pt.:
ca. 72.2 °C
Atm. press.:
ca. 1 008 hPa

The preliminary study and measurements were performed under atmospheric pressure of 1008 hPa.

The average value of melting point was found at approximately 72.2 ± 0.1 °C when heated at 3.0 °C per minute starting at 30 °C (at about 10.0 °C below the expected boiling temperature, the heating rate was reduced to 0.5 °C/min).

The measuring accuracy depends on the BÜCHI Melting Point M-565 apparatus accuracy. The accuracy of the apparatus is defined as: up to 250.0 °C is equal to 0.3 °C, 250.0 - 400.0 °C is equal to 0.3 °C - 0.5 °C). In this study, the accuracy of the apparatus was equal to 0.3 °C.

Sample

The melting point value, °C

(automatically)

Atmospheric pressure, hPa

1

72.3

1008

2

72.2

3

72.2

Average value and standard deviation, °C

72.2 ± 0.1

-
Conclusions:
The melting point of tested item was observed at temperature of 72.2 ± 0.1 °C under atmospheric pressure of 1008 hPa.
Executive summary:

The determination of the melting point was carried out in accordance with OECD Guideline for Testing of Chemicals No. 102 “Melting point/melting range” in conformity with the EEC method A.1, with GLP. The capillary tube method was used with the BÜCHI Melting Point B-565 apparatus. The measurements were performed in three samples of the test item. The melting point of tested item was observed at temperature of 72.2 ± 0.1 °C under atmospheric pressure of 1008 hPa.

Description of key information

Key study: According to OECD Guideline nº 102 and EEC method A.1. GLP study. The melting point of tested item was observed at temperature of 72.2 ± 0.1 °C under atmospheric pressure of 1008 hPa.

Key value for chemical safety assessment

Melting / freezing point at 101 325 Pa:
72.2 °C

Additional information

Key study: The determination of the melting point was carried out in accordance with OECD Guideline for Testing of Chemicals No. 102 “Melting point/melting range”, with GLP. The measurements were performed in three samples of the test item. The melting point of the test item was observed at temperature of 72.2 ± 0.1 °C under atmospheric pressure of 1008 hPa.