Registration Dossier
Registration Dossier
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EC number: 234-409-2 | CAS number: 12001-85-3
Partition coefficient
Administrative data
Link to relevant study record(s)
Description of key information
The partition coefficient of naphthenic acids, zinc salts was determined in a HPLC study to range from 0.8-5.4.
Key value for chemical safety assessment
Additional information
The partition coefficient of naphthenic acids, zinc salts was determined to range from 0.8-5.4. The partition coefficient of naphthenic acids, zinc salts was determined in a GLP-compliant test (Charles River 2018) following OECD guideline 117. The results are considered to be reliable for use.
The partition coefficient of zinc naphthenate was estimated using a QSAR model (KOWWIN v1.68 in EPISuite v4.11, US EPA 2012), following the Atom/Fragment Contribution method. KOWWIN provides estimates for the ionised acid rather than zinc naphthenate. The log octanol-water partition coefficient (Log Kow) values for the representative constituents of zinc naphthenate are estimated by QSAR to be in the range of 1.89 - 11.15.
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