5,5'-sulfonylbis(2-benzofuran-1,3-dione)

Ecotoxicological Summary

Conclusion on classification

Aquatic toxicity

Acute toxicity data for the test item are available for two trophic levels, daphnia and algae. The relevant acute effect values were the 72-h E_rC₅₀of > 100 mg/L and the 48-h EC₅₀of > 100 mg/L (based on nominal dissolved test item concentration) observed for the effect of the test item on growth inhibition ofPseudokirchnerella subcapitataand on immobilization ofDaphnia magnain GLP-conform standard tests according to OECD 201 and 202. These values are selected as the acute reference values for classification.

 

Chronic toxicity data for the test item are available for one trophic level, algae. The chronic 72-h EC₁₀for algae is > 100 mg/L (based on nominal dissolved test item concentration) for the effect of the test item on growth rate ofPseudokirchneriella subcapitatain a GLP-conform standard test according to OECD 201. This value was selected as chronic reference values for classification, as well as for the second trophic level, the acute 48-h EC₅₀of > 100 mg/L (based on nominal dissolved test item concentration) forDaphnia magna,the non-readily biodegradability and the calculated logPow of 2.76.

 

Acute (short-term) aquatic hazard based on acute data:

 

48h-EC₅₀> 100 mg/L (daphnia)

72-hour E_rC₅₀> 100 mg/L (algae)

 

Based on this reference value, no classification for ACUTE/SHORT-TERM AQUATIC HAZARD is required according to Regulation (EC) No 1272/2008 and subsequent regulations and Directive 67/548/EEC and its subsequent amendments.

 

Chronic (long-term) aquatic hazard based on chronic & acute data and environmental fate:

 

72 -hour ErC₁₀> 100 mg/L mg/L (algae - chronic data)

48-hour EC₅₀> 100 mg/L mg/L (daphnia - acute data)

not readily biodegradable

logPow 2.76

 

Based on these data, no classification for CHRONIC/LONG-TERM AQUATIC HAZARD is required according to Regulation (EC) No 1272/2008 and subsequent regulations and Directive 67/548/EEC and its subsequent amendments.