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Ecotoxicological information

Toxicity to terrestrial plants

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Description of key information

Avena sativa (oats) and dicot Lactuca sativa (lettuce)

17 d NOEC based on seed germination: >47.4 mg a.i./kg dry soil

17 d NOEC values based on plant growth (length and dry weight): >47.4 mg a.i./kg dry soil

OECD guideline 208, RL1, GLP; read-across from MDEA-Esterquat C16-18 and C18 unsatd.

Key value for chemical safety assessment

Long-term EC10, LC10 or NOEC for terrestrial plants:
47.4 mg/kg soil dw

Additional information

No experimental data are available for the target substance MDIPA Esterquat C16-18 and C18 unsatd.  However, a toxicity study in terrestrial plants is available for the source substance MDEA-Esterquat. A justification for read-across is given in the general endpoint summary Terrestrial toxicity.

The effect of MDEA-Esterquat C16-18 and C18 unsatd. on seedling emergence and growth of the monocotyl oat (Avena sativa) and dicotyl lettuce (Lactuca sativa) crops was studied at nominal concentrations of 0 and 47.4 mg a.i./kg dry soil (1000 mg dispersion/kg dry soil). The study was conducted according to OECD TG 208. The growth medium used in the test was a mixture of natural soil and sand (1:1; pH 7.5; organic matter 1.1%). On day 17, the surviving plants per pot were recorded and cut at soil level for measuring the plant height and dry weight in the seedling emergence and vegetative vigour test, respectively. Seed germination was not affected by the MDEA-Esterquat C16-18 and C18 unsatd.  The 17 d NOEC based on seed germination was >47.4 mg a.i./kg dry soil. In the vegetative vigour test, the plant dry weight and plant height were not affected by MDEA-Esterquat C16-18 and C18 unsatd. treatment. The 17 d NOEC values based on plant growth (length and dry weight) was >47.4 mg a.i./kg dry soil.