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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

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Administrative data

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.

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