Registration Dossier
Registration Dossier
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EC number: 215-657-0 | CAS number: 1338-02-9
Biodegradation in water: screening tests
Administrative data
Link to relevant study record(s)
Description of key information
The environmental fate of copper naphthenate in the environment is most accurately evaluated by separately assessing the fate of its constituents copper cations and naphthenate anions.
The concept of biodegradation is not applicable to copper cations since metals are not biodegraded. However, as a result of naturally occurring geochemical processes copper ions are removed from the water column. The removal of copper ions from the water column was modelled based on EUSES model parameters and different pH. Under most “environmentally relevant” conditions, more than 70% of dissolved copper is removed within 28 days. Copper is transformed to sulfide complexes (Cu-S) which are stable. Remobilisation of Cu to the water-column is not likely to occur.Copper is therefore considered rapidly removed, conceptually equivalent to “rapid degradation” for organic substances.
Naphthenate can be considered to be readily / inherently biodegradable.
Key value for chemical safety assessment
Additional information
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