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Ecotoxicological information

Endpoint summary

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Description of key information

The 21-day LC50 for parental survival was 0.305 mg/L, the overall LOEC was >0.134 mg/L and the overall NOEC was 0.134 based on measured concentrations (Daphnia magna). 

Additional information

Acute toxicity

The key fish and algae studies of MMT(EHTG) were performed using measured concentrations. A 100 % Water-Accommodated Fraction (WAF) (6.0 mg/L) was not lethal to zebra fish (B. rerio) (LC50 > 6 mg/L); however, non-lethal effects with respect to the condition of the test animals were reported; the NOEC was 3.6 mg/L (56 % of the WAF). A 99 % Water Soluble Fraction (WSF) (1.84 mg/L) produced only a slight inhibitory effect on S. subspicatus and the NOEC was 0.595 mg/L (33 % of the WSF). 

 

Chronic Toxicity

Parental mortality was 100 % in Daphnia magna exposed to 50 % (0.694 mg/L) and 100% (2.315 mg/L) of the Water-Accommodated Fraction of MMT(EHTG). Reproduction was not affected at concentrations up to 0.134 mg/L (10 % of the WAF). The 21-day LC50 for parental survival was 0.305 mg/L, the overall LOEC was >0.134 mg/L and the overall NOEC was 0.134 based on measured concentrations. 

 

Toxicity to Microorganisms

The highest percent inhibition value obtained in the study for the test substance vessels was 11.0 %. The EC50 value is therefore greater than 1000 mg/L, the highest concentration tested.