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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Sediment toxicity

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Administrative data

Link to relevant study record(s)

sediment toxicity: short-term
Data waiving:
study scientifically not necessary / other information available
Justification for data waiving:

Description of key information

No study investigating the toxicity of (Z)-N-Octadec-9-enylhexadecan-1-amide (CAS No. 16260-09-6) on sediment dwelling organism is available. Substance has a high Koc, and is not ready biodegradable, but short term and long term studies on invertebrates surface water are available as long as long term study on soil macroorganisms. None of these studies showed any effect. It is therefore expected that no effect will occur in sediment and that the study is not necessary.

Key value for chemical safety assessment

Additional information

This endpoint is not a mandatory data requirement according to Annex VI of the REACH regulation 1907/2006/EC.

According to column 2 of Regulation (EC) 1907/2006 Annex IX long-term toxicity testing shall only be proposed if the chemical safety assessment indicates the need to investigate further the effects on aquatic organisms. The substance does not need further investigations due to the following reasons. As the test substance is highly insoluble in water (< 0.01 mg/L) it is expected that sediments are, if at all, only exposed to very small amounts of the test substance.

The Guidance on information requirements and chemical safety assessment, Chapter R7.b (ECHA, 2012) states that once insoluble chemicals enter a standard STP, they will be extensively removed in the primary settling tank and fat trap and thus, only limited amounts will get in contact with activated sludge organisms. Nevertheless, once this contact takes place, these substances are expected to be removed from the water column to a significant degree by adsorption to sewage sludge (Guidance on information requirements and chemical safety assessment, Chapter R.7b, (ECHA, 2012)). Thus, only limited concentrations of the substance will presumably be discharged to the aqueous/sediment compartment. Thus, due to the low expected environmental concentrations of the substance a chronic exposure of sediment organisms is unlikely.

Furthermore, no effects were observed to aquatic algae, daphnia and fish in the range of water solubility. Since only low amounts of the test substance can be expected in the aquatic environment and no adverse effects of the substance are expected no long-term tests on sediment organisms should be performed.