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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Partition coefficient

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Endpoint:
partition coefficient
Type of information:
migrated information: read-across from supporting substance (structural analogue or surrogate)
Adequacy of study:
key study
Study period:
Not reported
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: GLP status not known, information from a published handbook, acceptable with restrictions.
Principles of method if other than guideline:
The use of secondary sources of data is acceptable when they are based on a critical evaluation of peer-reviewed data and a consequent selection of a reliable and representative value for the property under investigation. The introduction to Exploring QSAR, Hydrophobic, Electronic and Steric Constants states that it is an extensive compilation of published data. Each record is evaluated and the preferred value is identified for each substance. Therefore, although the method used is not known, the values presented here are acceptable as they are from a reliable secondary source of phys chem. data.
GLP compliance:
not specified
Type of method:
other: Method details not available, but value is taken from a reliable, peer-reviewed handbook
Partition coefficient type:
octanol-water
Analytical method:
not specified
Type:
log Pow
Partition coefficient:
5.69
Temp.:
20 °C
Remarks on result:
other: temperature assumed

No further details.

Conclusions:
The log Kow of triphenyl phosphine, the organic component of carbonyl(pentane-2,4-dionato-O,O')(triphenylphosphine)rhodium, is 5.69.
Executive summary:

This information is taken from a reliable peer reviewed handbook and so can be considered reliable and suitable for use as the key study for this endpoint. The log Kow of triphenyl phosphine, the organic component of carbonyl(pentane-2,4-dionato-O,O')(triphenylphosphine)rhodium, is 5.69.

Endpoint:
partition coefficient
Type of information:
migrated information: read-across from supporting substance (structural analogue or surrogate)
Adequacy of study:
key study
Study period:
Not reported
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: GLP status not known, information from a published handbook, acceptable with restrictions.
Principles of method if other than guideline:
The use of secondary sources of data is acceptable when they are based on a critical evaluation of peer-reviewed data and a consequent selection of a reliable and representative value for the property under investigation. The introduction to Exploring QSAR, Hydrophobic, Electronic and Steric Constants states that it is an extensive compilation of published data. Each record is evaluated and the preferred value is identified for each substance. Therefore, although the method used is not known, the values presented here are acceptable as they are from a reliable secondary source of phys chem. data.
GLP compliance:
not specified
Type of method:
other: Method details not available, but value is taken from a reliable, peer-reviewed handbook
Partition coefficient type:
octanol-water
Analytical method:
not specified
Type:
log Pow
Partition coefficient:
0.4
Temp.:
20 °C
Remarks on result:
other: temperature assumed

No further details.

Conclusions:
The log Kow of acetylacetone, the organic component of carbonyl(pentane-2,4-dionato-O,O')(triphenylphosphine)rhodium, is 0.40.
Executive summary:

This information is taken from a reliable peer reviewed handbook and so can be considered reliable and suitable for use as the key study for this endpoint.

The log Kow of acetylacetone, the organic component of carbonyl(pentane-2,4-dionato-O,O')(triphenylphosphine)rhodium, is 0.40 at an assumed temperature of 20 °C.

Description of key information

The partition coefficient of carbonyl(pentane-2,4 -dionato-O,O')(triphenylphosphine)rhodium has been read-across from triphenyl phospine with a log Kow of 5.69 and acetylacetone with a log Kow of 0.40.

Key value for chemical safety assessment

Additional information

Partition coefficient is not a relevant endpoint for inorganic substances, therefore as this substance is organometallic data has been read across from the organic components of the substance.

 

Exploring QSAR, Hydrophobic, Electric, and Steric Constants by Hansch (1995 a, b) is a peer reviewed handbook and so can be considered reliable and suitable for use as the source of the key data for this endpoint.

 

The partition coefficient of carbonyl(pentane-2,4-dionato-O,O')(triphenylphosphine)rhodium has been read-across from triphenylphospine with a log Kow of 5.69 and acetylacetone with a log Kow of 0.40.