Registration Dossier

Ecotoxicological information

Endpoint summary

Administrative data

Description of key information

Based on the acute toxicity tests results of three trophic levels (fish, Daphnia and algae) with the analogue, the short-term LL/EL50 values are all above 100 mg/l, thus the loading rate of 100 mg/l is used as the key value for PNECwater calculation.

Additional information

Study reports on the analogue alkylated naphthalene have been available for acute tests with fish, invertebrates and algae. The results are summarized as below:

The fish acute toxicity test was performed according to OECD guideline No. 203 under GLP compliance. The result showed the test substance induced no visible or lethal effects in carp at 0.020 mg/l, being the average measured exposure concentration in a WAF prepared at a loading rate of 100 mg/l (NOEC). The 96 h-LC50 exceeded 0.020 mg/l, being the average measured exposure concentration in a WAF prepared at a loading rate of 100 mg/l.

The acute toxicity test with Daphnia magna was performed according to OECD guideline No. 202 under GLP compliance. The result showed the test substance did not induce acute immobilisation of Daphnia magna at 0.62 mg/l, being the average measured concentration in a WAF prepared at a loading rate of 100 mg/l after 48 hours of exposure (NOEC). The 48 h-EC50 exceeded 0.62 mg/l, being the average measured concentration in a WAF prepared at a loading rate of 100 mg/l.

Algal growth inhibition test was performed according to OECD guideline No. 201 under GLP compliance. The result showed no reduction of growth rate or inhibition of yield was recorded at any of the WAFs of Alkylated Naphthalene tested. Both the EC50 for growth rate reduction (72 h-ErC50) and the EC50 for yield inhibition (72 h-EyC50) exceeded 0.2 mg/l, being the Time Weight Average concentration in a WAF prepared at a loading rate of 100 mg/l.