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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

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Physical & Chemical properties

Vapour pressure

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Endpoint:
vapour pressure
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.
Temp.:
25 °C
Vapour pressure:
0.063 mm Hg
Endpoint:
vapour pressure
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.
Temp.:
25 °C
Vapour pressure:
0.081 Torr
Endpoint:
vapour pressure
Type of information:
not specified
Adequacy of study:
weight of evidence
Study period:
2007
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.
Temp.:
25 °C
Vapour pressure:
10 Pa
Endpoint:
vapour pressure
Type of information:
not specified
Adequacy of study:
weight of evidence
Study period:
1963
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.
Temp.:
25 °C
Vapour pressure:
10.7 Pa
Endpoint:
vapour pressure
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.
Temp.:
25 °C
Vapour pressure:
10.7 Pa
Endpoint:
vapour pressure
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.
Temp.:
62 °C
Vapour pressure:
131 Pa

Description of key information

The vapour pressure of hexachlorocyclopentadiene is 10.88 Pa at 25 °C (s.d. = ± 2.08 Pa)

Key value for chemical safety assessment

Vapour pressure:
10.88 Pa
at the temperature of:
25 °C

Additional information

A literature search of available information for the vapour pressure of Hexachlorocyclopentadiene identified a number of experimental values. None of the data available gave any experimental information or came from secondary literature. Therefore a Weight of Evidence approach was taken to estimate the vapour pressure. 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.

Vapour pressure = 10.88 Pa at 25°C (s.d. =±2.08 Pa)