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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Diss Factsheets

Environmental fate & pathways

Endpoint summary

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Administrative data

Description of key information

Studies on the bioaccumulative behaviour of naphthenic acids, zinc salts, basic are not available. Thus, read-across to the assessment entities zinc cations and naphthenate anions is applied since the ions of the substance naphthenic acids, zinc salts, basic determine its fate and toxicity in the environment.

Zinc is an homeostatically controlled, essential element which is actively regulated by organisms. Therefore, bioaccumulation is not considered relevant for zinc.

Available data suggest a low or no bioaccumulation potential for naphthenate: a BCF of 2 L/kg wet-wt based was measured in rainbow trout for one C-13 component of the naphthenic acids; the Japanese METI-NITI database reports a range of BCF from 1.6 to 27 L/kg wet-wt for sodium naphthenate.

Based on the low bioaccumulative potential of its dissociation products zinc and naphtenic acids, a similar low potential is assumed for naphthenic acids, zinc salts, basic.

Additional information