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Ecotoxicological information

Sediment toxicity

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Reference
Endpoint:
sediment toxicity: long-term
Data waiving:
other justification
Justification for data waiving:
other:

Description of key information

The chemical safety assessment according to Annex I of Regulation (EC) No 1907/2006 does not indicate the need to investigate further the toxicity to sediment organisms.

Key value for chemical safety assessment

Additional information

According to the Guidance on information requirements and chemical safety assessment, R.7b (ECHA, 2017) no sediment testing is necessary if the PEC/PNEC ratio is above one. The environmental exposure assessment for the substance Reaction mass of N-(1-oxooctadecyl)sarcosine and N-hexadecanoyl-N-methylglycine (EC 947-850-7) indicates no risk for the sediment compartment (all RCR < 1; please refer to Chapter 9 and 10 of the Chemical Safety Report for detailed information).

Furthermore, Reaction mass of N-(1-oxooctadecyl)sarcosine and N-hexadecanoyl-N-methylglycine (EC 947-850-7) has a water solubility of 2.86 mg/L at at 20 °C (OECD 105) and the Log Koc of 2.17 – 4.08 (25 °C, pH 4 – pH 9, Franco, Fu and Trapp) indicating a low to moderate potential for adsorption of the substance to sediment particles. Moreover, the substance is determined to be readily biodegradable and according to the Guidance on information requirements and chemical safety assessment, Chapter R.7b, readily biodegradable substances can be expected to undergo rapid and ultimate degradation in most environments, including biological Sewage Treatment Plants (STPs) (ECHA, 2017). Thus, a release to the aquatic compartment is considered to be limited. Furthermore, the substance has a low potential for bioaccumulation (see chapter 5.3.1), i.e. based on log D < 4.5, metabolisation and excretion and BCF values of 10 – 421.7 L/kg wet-wt (EPI Suite v4.11 and VEGA v1.2.3). Thus, the substance is not expected to bioaccumulate in aquatic species. 

Thus, taking all these information into account, no further test with sediment organisms is proposed for Reaction mass of N-(1-oxooctadecyl)sarcosine and N-hexadecanoyl-N-methylglycine (EC 947-850-7).