Registration Dossier
Registration Dossier
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EC number: 201-029-3 | CAS number: 77-47-4
Melting point / freezing point
Administrative data
Link to relevant study record(s)
- 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
Referenceopen allclose all
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)
Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.
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