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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Toxicity to microorganisms

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Administrative data

Link to relevant study record(s)

Description of key information

activated sludge respiration inhibition: 3h NOEC> 47.4 mg a.i./L (nominal); read across MDEA-Esterquat C16-18 and C18 unsatd.

Key value for chemical safety assessment

EC10 or NOEC for microorganisms:
47.4 mg/L

Additional information

No experimental data are available for the target substance MDEA-Esterquat C18 satd. However, a toxicity study to microorganisms is available for the closely related source substance MDEA-Esterquat C16 -18 and C18 unsatd. A justification for read-across is given in the general endpoint summary Aquatic toxicity.

In a 3-hour toxicity study, activated sludge fed with synthetic sewage was exposed to MDEA-Esterquat C16-18 and C18 unsatd. at nominal concentrations of 0 and 47.4 mg a.i./L in accordance with OECD 209 (Activated Sludge Respiration Inhibition). The NOEC based on respiration rate was >47.4 mg a.i./L.