Registration Dossier

Ecotoxicological information

Endpoint summary

Administrative data

Description of key information

Additional information

With high probability acutely not harmful to aquatic organisms.

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

Regarding the acute toxicity towards aquatic organisms, several GLP-guideline studies conducted with organisms from three trophic levels (fish, Daphnia and algae) are available which show that no inhibitory or toxic effects (L(E)C50 > 100 mg/L loading rate) emanate from the test substance up the limit of water-solubility under test conditions.

No long-term effect was observed in freshwater algae (NOEC >= 100 mg/L nominal, eluate)

The long-term toxicity of the test substance towards fish was assessed in a fish early life stage test using fathead minnow showing no observable chronic effects (NOEC >= 8.8 µg/L, mean measured;10 – 18 µg/L within the first 21 days of exposure).

The long-term toxicity towards invertebrates was assessed in four Daphnia reproduction studies. The first study was considered as not reliable due to serious methodological deficiencies. The other three valid and reliable studies revealed to chronic effects up to the limit of solubility under test conditions (NOEC >= 14.3, 11.4 and 12.7 µg/L, respectively (time weighted mean measured)).

Taking all available and reliable information into account, the substance has no acute and no chronic effects towards aquatic organisms. This was confirmed during the 47thRAC meeting on November 29th, 2018. At this meeting, it was concluded that based on all available data, the substance does not warrant a classification for environmental hazard.