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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Administrative data

Description of key information

Additional information

Release to the environment is limited, as (Z)-N-Octadecyldocos-13-enamide (CAS No. 10094-45-8) is highly insoluble in water and only limited concentrations of the substance will presumably be discharged to the aqueous/sediment compartment. Therefore the release to surface waters, and thereby exposure of sediment and soil, is considered as marginally as the substance is  bioavailable only in very low amounts (if at all). However, if the substance is exposed to water, it will not evaporate into the atmosphere from the water surface because of its low vapour pressure and low Henry's Law Constant. Thus, air is not a likely route of environmental contamination and accumulation and subsequent deposition of (Z)-N-Octadecyldocos-13-enamide (CAS No. 10094-45-8) is not to be expected.

The substance is stable in water; hydrolysis is not expected to be an important process in the fate of (Z)-N-Octadecyldocos-13-enamide (CAS No. 10094-45-8).

The substance is not expected to be readily biodegradable. Moreover, biodegradability properties of (Z)-N-Octadecyldocos-13-enamide (CAS No. 10094-45-8) has been investigated, following the request from ECHA, by performing simulation tests as followed:

Sediment simulation testing (OECD 308, at 12 °C) and

Soil simulation testing (OECD 307, at 12 °C).

Both studies conclude that there is very weak biodegradation in both soil and water/sediment system with a half-life of 6630 days in the water sediment/system and there was no significant decline in the four soils under aerobic conditions.

Biomagnification of the substance through the food chain has been investigated in an OECD 305 test (GLP, dietary exposure). Dietary exposure is considered being the most relevant exposure pathway based on the poor water solubility and high adsorption potential of the substance. The study leads to the conclusion that a rapid elimination of the substance from the fish’s tissue occurs quickly (growth corrected half-life of 0.46 days) and the normalized biomagnification factor were estimated to be <0.1. Therefore it is not expected that the substance accumulates in the food chain.