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Physical & Chemical properties

Melting point / freezing point

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Endpoint:
melting point/freezing point
Type of information:
other: published data
Adequacy of study:
weight of evidence
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
data from handbook or collection of data
Principles of method if other than guideline:
Data published no detail on the method
GLP compliance:
not specified
Melting / freezing pt.:
-130 °C

Value coming from a published data without information about the pressure related to this freezing temperature

Conclusions:
The freezing temperature of the test item is indicated to be -130°C
Executive summary:

The freezing temperature of the test item is indicated to be -130°C in a published data

Endpoint:
melting point/freezing point
Type of information:
other: handbook data
Adequacy of study:
weight of evidence
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
study well documented, meets generally accepted scientific principles, acceptable for assessment
Principles of method if other than guideline:
Data is from handbook, no details are provided.
GLP compliance:
not specified
Type of method:
other: not specified
Melting / freezing pt.:
141.15 K
Remarks on result:
other: Yaws' Handbook of Physical Properties for Hydrocarbons and Chemicals data
Melting / freezing pt.:
-132 °C
Remarks on result:
other: Yaws' Critical Property Data for Chemical Engineers and Chemists data
Melting / freezing pt.:
-131.9 °C
Remarks on result:
other: Knovel Critical Tables data

Value from generally accepted authoritative secondary source. No data available for pressure.

Conclusions:
In 3 data coming from Knovel database, the freezing point of the test item is indicated to be -132°C
Executive summary:

The freezing point of the test item is indicated to be -132°C in 3 references coming from Knovel database.

Endpoint:
melting point/freezing point
Type of information:
other: published data
Adequacy of study:
weight of evidence
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
data from handbook or collection of data
Principles of method if other than guideline:
Published data no detail on the method
GLP compliance:
not specified
Type of method:
other: not specified
Melting / freezing pt.:
-130 °C

Value coming from a published data without information about the pressure related to this freezing temperature

Conclusions:
The freezing temperature of the test item is indicated to be -130°C in a published data
Executive summary:

The freezing temperature of the test item is indicated to be -130°C in a published data

Endpoint:
melting point/freezing point
Type of information:
not specified
Adequacy of study:
weight of evidence
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
study well documented, meets generally accepted scientific principles, acceptable for assessment
Principles of method if other than guideline:
Data is from handbook, no details are provided.
GLP compliance:
not specified
Type of method:
other: not specified
Melting / freezing pt.:
-132 °C
Remarks on result:
other: "PhysProp" data

Value from generally accepted authoritative secondary source. No data available for pressure.

Conclusions:
The freezing point of the test item is indicated to be -132°C
Executive summary:

The freezing point of the test item is indicated to be -132°C in the reliable "Physprop" database

Description of key information

Key value for chemical safety assessment

Melting / freezing point at 101 325 Pa:
-132 °C

Additional information

A weight of evidence approach was used to assess the freezing temperature of the test item. In 3 recognised secondary sources (coming from Knovel database and Physprop database), the freezing temperature is indicated to be -132°C. In two publised data, this parameter is specified to be -130°C. The gap observed between these two values can be explained by the uncertainty of the temperature measurements.

The value used as the key value for chemical safety assessment is the value obtained from the recognised secondary sources.