Registration Dossier

Ecotoxicological information

Endpoint summary

Administrative data

Description of key information

Daphnids and algae were the most sensitive trophic level with acute EC50 and ErC50 of > 100 mg/L. The ErC10 for algae was > 100 mg/L. For daphnids a chronic EC10 of 9.0 mg/L was obtained.

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, acute and chronic data are available for daphnids and freshwater algae from a read across substance. Furthermore STP microorganisms are available for a read across substance. Long-term studies for fish are waived. Experimental information about toxicity on marine organisms is not available.

The short-term EC50/LC50 values for fish, Daphnia, algae and microorganisms were 960, > 100, > 100 and 164 mg/L, respectively. Chronic data for daphnids and algae are 9 and > 100 mg/L, respectively.

The registered substance has a log Pow of << 3 resulting in a low likelihood to partition to sediment. 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 PNECs for these endpoints will be calculated using the partition coefficient method.

The daphnids and algae were the most sensitive trophic level with acute EC50 and ErC50 of > 100 mg/L. For daphnids a chronic EC10 of 9.0 mg/L was obtained. This value will be used as worst case scenario for the risk assessment of aquatic organisms.