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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Ecotoxicological information

Short-term toxicity to fish

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Administrative data

Link to relevant study record(s)

Description of key information

A PNEC is not derived since no adverse effects were observed in acute tests in the range of the water solubility of the test substances.

Key value for chemical safety assessment

Additional information

Studies are available for the pure homologue members of the fatty acid category. In addition some studies are summarized for certain fatty acid mixtures. Generally it could be stated that toxicity of fatty acids to aquatic organisms increases with increasing chain length up to the water solubility limit at a chain length of C12. For longer chains, no effects at saturation are observed. For fatty acids, C16 -22 (CAS 68002 -88 -0), which contains as one of the main constituent C18, read-across is performed to a available for the pure homologue stearic acid (C18 - CAS 57 -11 -4) .

The homologue C18 (stearic acid: CAS 57 -11 -4) was tested on golden orfe (Leuciscus idus) (Richterich and Mühlberg, 2001c). In the static test, which was conducted according to DIN 38412/15, the fish were exposed to different concentrations of the test substance (1000, 3000, 10000 mg/L nominal). In the study no effects on fish were reported, resulting in a LC50 > 10000 mg/L.

Concluding from the result reported for the pure homologues C18 no toxicity within the range of water solubility is expected for the considered fatty acid (CAS 68002 -88 -0).