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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 2016-05-11 to 2016-05-13
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Reason / purpose for cross-reference:
reference to same study
Qualifier:
according to guideline
Guideline:
OECD Guideline 102 (Melting point / Melting Range)
Version / remarks:
1995
Deviations:
no
Qualifier:
according to guideline
Guideline:
EU Method A.1 (Melting / Freezing Temperature)
Deviations:
no
Qualifier:
according to guideline
Guideline:
EPA OPPTS 830.7200 (Melting Point / Melting Range)
Version / remarks:
1998
Deviations:
no
Qualifier:
according to guideline
Guideline:
other: CIPAC MT 1: Freezing point
Version / remarks:
2009
Deviations:
no
GLP compliance:
no
Type of method:
differential scanning calorimetry
Key result
Melting / freezing pt.:
5.4 °C
Atm. press.:
>= 987 - <= 994 hPa
Decomposition:
no
Remarks on result:
other: Melting point

As the onset temperatures in both tests deviate by less than 0.5 K from their mean value of 5.43 °C, the test item has a melting point of 5.4°C.

Replicate

Sample weight (mg)

Onset of effect ()

Range of effect ()

Weight loss (mg)

Atmospheric pressure (hPa)

1

16.86

5.25

0-40 (endo)

16.86

994.1

2

18.42

5.60

0-40 (endo)

18.42

987.2

The test item showed a second endothermic signal in the temperature range of approx. 90 – 300 °C that can be assigned to the boiling of the test item.

Conclusions:
The test item has a melting point of 5.4°C at atmospheric pressure (987 – 994 hPa, respectively).
Executive summary:

The melting point of the test item was assessed according to OECD 102, by differential scanning calorimetry. The test substance had an exothermal effect in the temperature range of -60 to -50°C, which is assigned to the freezing of the substance. During the heating phase a distinct endothermic effect was observed about 5.4°C, which is assigned to the melting of the substance.

Description of key information

The melting point of the test item was determined by means of differential scanning calorimetry and was found to be 5.4°C.

Key value for chemical safety assessment

Melting / freezing point at 101 325 Pa:
5.4 °C

Additional information

For this endpoint one experimental study is available, which has been conducted according to OECD 102, differential scanning calorimetry. The test item was found to have a melting point of 5.4°C.