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Description of key information

Two reliable QSAR models were used to assess the aquatic toxicity of the registered substance to fish, aquatic invertebrates and algae: iSafeRat holistic approach v1.5 and ECOSAR v1.11 models. Both QSAR results were considered reliable as the registered substance falls within the applicability domain of the models. The results of each model are presented in the table below:


iSafeRat holistic approach v1.5

ECOSAR v1.11

E(L)C50 Key values - Geometric mean

Acute fish

96h-LC50 = 3.6 mg/L (95% CL : 2.9-4.4 mg/L)

96h-LC50 = 23.9 mg/L

9.3 mg/L

Acute Daphnia

48h-EC50 = 3.0 mg/L (95% CL : 1.9-4.6 mg/L)

48h-LC50 = 7.5 mg/L

4.7 mg/L


72h-ErC50 = 5.6 mg/L (95% CL : 3.8-8.4 mg/L)

96h-EC50 = 34.3 mg/L

13.9 mg/L

Both QSAR models were used as key data points. Therefore, the E(L)C50 key values, used for chemical safety assessment, were determined as the geometric mean of predicted E(L)C50 values, corresponding to 4.7 mg/L for aquatic invertebrates, 9.3 mg/L for fish and 13.9 mg/L for algae.

Finally, the registered substance is readily biodegradable and no inhibition effects of the activity of microorganisms was observed in the biodegradation study at 100 mg/L. Therefore, in accordance with column 2 of REACH Annex VIII, the activated sludge respiration inhibition test does not need to be conducted.

Additional information