Registration Dossier

Ecotoxicological information

Endpoint summary

Administrative data

Description of key information

Additional information

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. In addition, a long-term-study is available for daphnids. A long-term study for fish is 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 >32, 19, 26 mg solid content /L. The chronic Dapphnia study resulted in an overall NOEC of 3.6 mg a.i./L. Based on the toxic control of a ready biodegradation study, 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 daphnids were the most sensitive trophic level with an acute EC50 of 19 mg/L and a chronic NOEC of 3.6 mg/L. This value of 3.6 mg/L will be used as worst case scenario for the risk assessment of aquatic organisms.