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Diss Factsheets

Physical & Chemical properties

Melting point / freezing point

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Administrative data

Link to relevant study record(s)

Reference
Endpoint:
melting point/freezing point
Type of information:
experimental study
Adequacy of study:
key study
Study period:
31.03. - 23.05.06
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to guideline
Guideline:
EU Method A.1 (Melting / Freezing Temperature)
GLP compliance:
yes (incl. QA statement)
Type of method:
capillary method
Key result
Melting / freezing pt.:
45.4 °C
Atm. press.:
1 013.3 hPa
Decomposition:
no

Transmission calibration:

A transmission calibration was performed prior to the melting point measurement.

Pre-test:

The heating rate for determining the melting range was 10 °C/min. The mean value from the automatically measured melting points was used for defining the set and max points.

Main test:

The substance was ground and filled into 3 separate capillary tubes. The filling height was between 4 to 5 mm and the heating rate set to 0.5 °C/min. For the main test, the setpoint was set to 40 °C and the maxpoint to 50 °C.

Table 1. Measured melting points of the test item (2nd main test):

 Melting points in °C  Mean value     Standard deviation in °C
 Position 1 (left) Position 2 (middle)   Position 3 (ríght)    Actual value  Target value
 45.4  45.4  45.5  45.4  +/- 0.06  <= +/- 0.3

Verification of the test item measurement was performed with the two reference substances 4-acetylbenzonitrile (melting point 58.1 °C) and m-toluic acid (melting point 112.2 °C). With these two substances the main test was repeated and the results recorded.

Conclusions:
The substance has a melting point of 45.4 °C at atmospheric pressure.
Executive summary:

A study was conducted according to Regulation (EC) No 440/2008 method A.1. The melting point of the test item was determined by the capillary method. As a resut of the test, the melting point of the test item is 45.4 °C at atmospheric pressure.

Description of key information

A study was conducted according to Regulation (EC) No 440/2008 method A.1. The melting point of the test item was determined by the capillary method. As a result of the test, the melting point of the test item is 45.4 °C at atmospheric pressure.

Key value for chemical safety assessment

Melting / freezing point at 101 325 Pa:
45.4 °C

Additional information