Registration Dossier

Data platform availability banner - registered substances factsheets

Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Physical & Chemical properties

Melting point / freezing point

Currently viewing:

Administrative data

Link to relevant study record(s)

Referenceopen allclose all

Endpoint:
melting point/freezing point
Type of information:
not specified
Adequacy of study:
weight of evidence
Study period:
2017
Reliability:
4 (not assignable)
Rationale for reliability incl. deficiencies:
documentation insufficient for assessment
Qualifier:
no guideline required
Principles of method if other than guideline:
Data collected from literature search to use in weight of evidence approach.
Melting / freezing pt.:
-8.9 °C
Endpoint:
melting point/freezing point
Type of information:
not specified
Adequacy of study:
weight of evidence
Study period:
1979
Reliability:
4 (not assignable)
Rationale for reliability incl. deficiencies:
documentation insufficient for assessment
Qualifier:
no guideline required
Principles of method if other than guideline:
Data collected from literature search to use in weight of evidence approach.
Melting / freezing pt.:
-9.9 °C
Endpoint:
melting point/freezing point
Type of information:
not specified
Adequacy of study:
weight of evidence
Study period:
1978
Reliability:
4 (not assignable)
Rationale for reliability incl. deficiencies:
documentation insufficient for assessment
Qualifier:
no guideline required
Principles of method if other than guideline:
Data collected from literature search to use in weight of evidence approach.
Melting / freezing pt.:
-9.9 - -9.5 °C

Description of key information

Mean melting point: - 9.5 °C (s.d. = ± 0.58 °C)

Key value for chemical safety assessment

Melting / freezing point at 101 325 Pa:
-9.5 °C

Additional information

A literature search of available information for the melting point of Hexachlorocyclopentadiene identified a number of experimental values. None of the data available gives any experimental information or comes from secondary literature. Therefore a Weight of Evidence approach was taken to estimate the melting point. In accordance with the recommended approach given by ECHA (2016) and NIST (2015) the value was calculated as follows:

 1.      Estimates of the mean and standard deviation are computed.

2.      Values greater than three times the standard deviations of the mean are excluded.

3.      If values have been excluded, the process is repeated with estimates based on the remaining values.

Mean melting point: - 9.5°C (s.d. = ±0.58°C)