Registration Dossier

Ecotoxicological information

Endpoint summary

Administrative data

Description of key information

A study was performed to assess the acute toxicity of the test item to Daphnia magna. The method followed was designed to be compatible with the OECD Guidelines for Testing of Chemicals (April 2004) No 202, "Daphnia sp., Acute Immobilisation Test" referenced as Method C.2 of Commission Regulation (EC) No. 440/2008.

Exposure of Daphnia magna to the test item gave EC50 values of greater than 100 mg ai/L. The No Observed Effect Concentration was 100 mg ai/L.

A study was perford to assess the effect of the test item on the growth of the green alga Pseudokirchneriella subcapitata. The method followed was designed to be compatible with the OECD Guidelines for Testing of Chemicals (2006) No 201, "Freshwater Alga and Cyanobacteria, Growth Inhibition Test" referenced as Method C.3 of Commission Regulation (EC) No 761/2009. 

Analysis of the 100 mg ai/L test preparation at 0 hours showed a measured test concentration of 93% of nominal was obtained. A decline in measured test concentration was observed at 72 hours to 15% of nominal indicating that the test item was unstable over the test period.

 

Given this decline in measured test concentrations it was considered justifiable to base the results on the geometric mean measured test concentrations in order to give a "worst case" analysis of the data.

 

Exposure of Pseudokirchneriella subcapitata to the test item gave EC50values based on the geometric mean measured test concentrations of greater than 37 mg ai/L. The No Observed Effect Concentration was 37 mg ai/L.

Additional information