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Ecotoxicological information

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The environmental hazard assessment for (fresh-) water organisms and sediment habitats is supported by several acute studies (pelagic compartment) and by using scientific argumentation (sediment dwelling organisms).

For the environmental hazard assessment of the registered substance acute toxicity studies for freshwater fish, daphnids, freshwater algae and STP microorganisms are available. Long-term studies for fish and daphnids are waived. Experimental information about toxicity on marine organisms is not available.

The above studies were conducted with test material which contained the submission substance. The concentration of solid content in the respective test materials was used to calculate the effect concentrations for the registered substance.

The short-term EC50/LC50 values for fish, Daphnia and algae were 57, 72, 87 mg /L. Based on the toxic control of a ready biodegradation study with a read across substance, no toxic effects on STP organisms were found at 50 mg/L.

The registered substance has a log Pow of << 3 resulting in a low likelihood to partition to sediment and is only moderately toxic to pelagic aquatic organisms. Therefore, the registered substance is not expected to cause adverse effects on sediment organisms. Consequently sediment toxicity tests do not need to be conducted to assess the risk for sediment-dwelling organisms.

The fish were the most sensitive trophic level with an acute LC50 of 57 mg /L. This value will be used as worst case scenario for the risk assessment of aquatic organisms.


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