Registration Dossier

Ecotoxicological information

Endpoint summary

Administrative data

Description of key information

Additional information

Data on aquatic effects of the test substance are available on three trophic levels (fish, daphnia and algae) for acute toxicity.

The toxicity to fish: After 96 hours of exposure a LC50 value of 562 mg/L (geometric mean of nominal concentration) was obtained.

The toxicity to aquatic invertebrates (Daphnia magna): After 48 hours of exposure an EC50 of >100 mg/L (nominal) was determined.

The toxicity to aquatic algae (Desmodesmus subspicatus): During 72 hours exposure an ErC50 of >100 mg/L (nominal) was measured.

Toxicity to microorganisms of the test substance, an EC50 of > 10000 mg/L (nominal) was observed.

All aquatic tests were performed using the test substance diluted in an 8 : 17 mixture of 1-methoxy-2-propyl acetate (CAS: 108-65-6) and solvent naphtha 100 (CAS: 64742-95-6), respectively. The test solution consisted to 75 % of the test item and to 25 % of the 1-methoxy-2-propyl acetate/solvent naphtha mixture. As the test substance is only marketed in the above described composition, these tests can be used for the evaluation of the environmental risks of the substance. The results further display a worst case as the test substance is almost insoluble in water and will therefore not be available in large amounts (if at all) in aquatic test systems. This is also the reason for the high effect value determined in the acute toxicity test to fish (LC50(96 h)= 562 mg/L) although the water solubility of the test item is <0.1 mg/L. As a conclusion the aquatic toxicity studies with the test substance diluted in organic solvents can be used as a worst case describing the toxicological behaviour of the test substance against aquatic organisms.

Conclusion

Based on the available results, the registered substance does not exhibit acute toxicity effects at its solubility limit to the three trophic levels and the microorganisms.