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Physical & Chemical properties

Partition coefficient

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partition coefficient
Type of information:
experimental study
Adequacy of study:
key study
Study period:
30 May - 28 June 2005
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
guideline study with acceptable restrictions
The study was conducted according to an internationally recognised method, and under GLP. However, the test was not suitable for the substance, as unstable, and the determination could not be achieved. Moreover, the test item identification is incomplete (unspecified cis-trans isomery, therefore identified under the generic CAS 17129-06-5). Therefore validation applies with restrictions.
Reason / purpose for cross-reference:
reference to other study
Reason / purpose for cross-reference:
reference to other study
according to guideline
EU Method A.8 (Partition Coefficient - Shake Flask Method)
Version / remarks:
Directive 92/69/EEC
GLP compliance:
yes (incl. QA statement)
Certificate from 2004-12-22
Type of method:
flask method
Partition coefficient type:
Analytical method:
gas chromatography
Remarks on result:
not determinable
not stable in octanol
Executive summary:

The partition coefficient of the test substance was measured, under GLP, according to EU A.8 guideline, shake-flask method. The determination could not be achieved, because the test substance is not stable in n-octanol (and not in water either).

Description of key information

The study cannot be completed because the substance decomposes.

Key value for chemical safety assessment

Additional information

An attempt was made to determine the partition coefficient of the substance, in an experimental study, conducted according to EU guideline and GLP. The analysis revealed that the substance was not stable in octanol. Therefore the study could not be achieved.

QSAR determination of the logKow of the parent substance is not considered to be of scientific interest, since the substance decomposes, its bioaccumulation potential is not relevant.

Moreover, considering the substance is used as an intermediate under strictly controlled conditions, the information on the degradation products has little meaning too.