Registration Dossier

Ecotoxicological information

Endpoint summary

Administrative data

Description of key information

Additional information

The test substance is acutely toxic to aquatic organisms.

The inhibition of the degradation activity of activated sludge is not anticipated when introduced in appropriate low concentrations.

The effects of the water accomodated fraction (WAF) of the test substance were examined according to OECD guideline 203. Brachydanio rerio was used as test organism [Dr. U. Noack-Laboratorien, 2013]. At test termination, an LL50 of 14.1 mg/L (nominal) was determined.

In the acute immobilization test with Daphnia magna the effects of the water accommodated fraction (WAF) were determined according to OECD guideline 202 [Dr. U. Noack-Laboratorien, 2013]. At test termination after 48 h, an EL50 of 17.7 mg/L (nominal) was determined.

The acute toxicity to algae was investigated in a GLP test according to OECD guideline 201 using Desmodesmus subspicatus as test organism [Dr. U. Noack-Laboratorien, 2013]. At test termination after 72 h, an ErL50 of 9.51 mg/L (nominal) and an ErL10 of 1.8 mg/L (nominal) was determined.

The acute toxicity of the test substance to microorganisms has been examined in a GLP guideline study according to OECD 209 with [BASF SE 2012]. At test termination after 180 min, an EC10 of 110 mg/L (nominal) was determined.

Studies assessing the long-term toxicity of the test item are not available. However, the results of the risk assessment covering all relevant exposures throughout the life cycle of submission item demonstrate the absence of a risk to the environment. The environmental concentrations were predicted and compared to the respective PNECs. The resulting RCRs for all identified uses were clearly below 1. Consequently, a need to investigate further the chronic effects on aquatic organisms is not indicated.