Registration Dossier
Registration Dossier
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EC number: 263-000-1 | CAS number: 61788-71-4
Endpoint summary
Administrative data
Description of key information
The environmental fate of naphthenic acids, nickel salts in the environment is most accurately evaluated by separately assessing the fate of its constituents nickel cations and naphthenate anions:
The concept of biodegradation is not applicable to nickel cations since metals are not biodegraded. However, as a result of naturally occurring geochemical processes nickel ions are removed from the water column. The removal of nickel ions from the water column was subsequently modelled using WHAM7, and under “environmentally relevant” conditions, more than 70% of dissolved nickel was removed from the water column within 28 days. Nickel is therefore considered rapidly removed, conceptually equivalent to “rapid degradation” for organic substances. Available data for the naphthenate anion indicate that the non-acidic fraction of naphthenic acids can be considered to be inherently biodegradable.
Additional information
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