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Diss Factsheets

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:
06.06.- 19.09.02
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:
yes
Type of method:
differential scanning calorimetry
Key result
Melting / freezing pt.:
> -24 - < 28 °C
Atm. press.:
1 013.3 hPa
Decomposition:
no
Sublimation:
no

The determination has been carried out three times. As a final result, the arithmetic mean was formed from the determination of the beginning of solidification and the determination of the end of solidification. The value was rounded to 0.5° in °C.

1. trial + 28.0°C to – 24.0°C

2. trial +28.0°C to -24.0°C

3. trial +28.0°C to -24.5°C

mean: + 28.0°C to – 24.0°C

Conclusions:
The freezing point of the test item was determined to be in range of -24 to +28 °C at 1013.25 hPa.
Executive summary:

A study was conducted according to OECD test guideline 102, Regulation (EC) No 440/2008 method A.1 to determine the freezing point of the test item using crystallizing apparatus. Therefore in a preliminary test the crystallizing apparatus was filled to the third with the test substance. During cooling of the sample, solid carbon dioxide was added so that the temperature of the cold bath was 20 to 25 °C below the sample temperature. The sample was continuously mixed during cooling by upward and downward movements of the stirrer. After the first crystals were removed, the stirrer was stopped and the temperature rise observed. The freezing range of the test item was determine to be between -24 °C and + 28 °C.

Description of key information

The freezing point of the test item was determined to be in range of -24 to +28 °C at 1013.25 hPa (reference 4.2 -1).

Key value for chemical safety assessment

Additional information

A study was conducted according to OECD test guideline 102, Regulation (EC) No 440/2008 method A.1 to determine the freezing point of the test item using crystallizing apparatus. Therefore in a preliminary test the crystallizing apparatus was filled to the third with the test substance. During cooling of the sample, solid carbon dioxide was added so that the temperature of the cold bath was 20 to 25 °C below the sample temperature. The sample was continuously mixed during cooling by upward and downward movements of the stirrer. After the first crystals were removed, the stirrer was stopped and the temperature rise observed. The freezing range of the test item was determine to be between -24 °C and + 28 °C.