Registration Dossier

Ecotoxicological information

Toxicity to aquatic algae and cyanobacteria

Currently viewing:

Administrative data

Link to relevant study record(s)

Description of key information

FAT 40840/A TE had a significant inhibitory effect on the growth (yield) of Scenedesmus subspicatus after the test period of 72 hours at the test concentrations of 2.1 mg/L (72-hour LOEC) and at all higher test concentrations. The 72-hour NOEC was determined to be 0.52 mg/L, since at this test concentration the growth rate and yield were not significantly lower than in the control.

Key value for chemical safety assessment

EC10 or NOEC for freshwater algae:
0.52 mg/L

Additional information

This modified algal test has demonstrated that the inhibitory effect of the test item FAT 40840/A TE on the growth of Scenedesmus subspicatus was caused in part by the indirect effect, the light absorption in the colored test solutions. However, the differences between experimental parts A and B were too high to state that the algal growth inhibition is only a result of a reduction in light intensity. Therefore, the results of experimental part A should be taken into consideration for the determination of the inhibitory effect of the test item on the algal growth. FAT 40840/A TE had a significant inhibitory effect on the growth (yield) of Scenedesmus subspicatus after the test period of 72 hours at the test concentrations of 2.1 mg/L (72-hour LOEC) and at all higher test concentrations. The 72-hour NOEC was determined to be 0.52 mg/L, since at this test concentration the growth rate and yield were not significantly lower than in the control.