Registration Dossier
Registration Dossier
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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.
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EC number: 201-029-3 | CAS number: 77-47-4
Water solubility
Administrative data
Link to relevant study record(s)
- Endpoint:
- water solubility
- Type of information:
- not specified
- Adequacy of study:
- weight of evidence
- Study period:
- 1977
- 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.
- Water solubility:
- 2.1 mg/L
- Remarks on result:
- other: no information on pH and temperature
- Endpoint:
- water solubility
- Type of information:
- not specified
- Adequacy of study:
- weight of evidence
- Study period:
- 1975
- 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.
- Water solubility:
- 0.805 mg/L
- Remarks on result:
- other: no information on pH and temperature
- Endpoint:
- water solubility
- Type of information:
- not specified
- Adequacy of study:
- weight of evidence
- Study period:
- 1982
- 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.
- Water solubility:
- 1.8 mg/L
- Temp.:
- 28 °C
- Remarks on result:
- other: no information on pH
- Endpoint:
- water solubility
- 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.
- Water solubility:
- 1.8 mg/L
- Temp.:
- 25 °C
- Remarks on result:
- other: no information on pH
- Endpoint:
- water solubility
- Type of information:
- not specified
- Adequacy of study:
- weight of evidence
- Study period:
- 1983
- Reliability:
- 3 (not reliable)
- Rationale for reliability incl. deficiencies:
- significant methodological deficiencies
- Qualifier:
- no guideline required
- Principles of method if other than guideline:
- Data collected from literature search to use in weight of evidence approach.
- Water solubility:
- 1.14 mg/L
- Temp.:
- 22 °C
- Remarks on result:
- other: no information on pH (deionised water)
- Water solubility:
- 1.08 mg/L
- Temp.:
- 22 °C
- Remarks on result:
- other: no information on pH (tap water)
- Endpoint:
- water solubility
- Type of information:
- not specified
- Adequacy of study:
- weight of evidence
- Study period:
- 1980
- 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.
- Water solubility:
- 2 mg/L
- Temp.:
- 25 °C
- Remarks on result:
- other: no information on pH
Referenceopen allclose all
Description of key information
The water solubility of hexachlorocyclopentadiene is 1.53 mg/L at 25 °C (standard deviation = 0.51 mg/L)
Key value for chemical safety assessment
- Water solubility:
- 1.53 mg/L
- at the temperature of:
- 25 °C
Additional information
A literature search of available information for the water solubility of Hexachlorocyclopentadiene identified a number of experimental values. Only the data from Chuo et al. (1983) gives experimental information, from a method not in line with currently accepted protocols. Therefore a Weight of Evidence approach will be taken to estimate the water solubility. In accordance with the recommended approach given by ECHA (2016) and NIST (2015) the value will be 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.
The available values were obtained at different temperatures. There is not a wide range in test temperatures, therefore it is considered as acceptable to calculate the water solubility using the available values. The water solubility of hexachlorocyclopentadiene is 1.53 mg/l at 25°C (standard deviation = 0.51 mg/l).
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