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Ecotoxicological information

Short-term toxicity to aquatic invertebrates

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Description of key information

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.

Key value for chemical safety assessment

EC50/LC50 for freshwater invertebrates:
100 mg/L

Additional information

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.

Alkylated naphthalene, EC Number 700-826-8, is a close structural analog of the Alkylnaphthalene being assessed in this dossier. The substances have similar chemical and physical properites and therefore the aquatic invertebrate toxicity testing for Alkylated naphthalene, EC Number 700-826-8, can be used as read-across to the alkylnaphthalene in this dossier.

A 48 -hour daphnia toxicity study was conducted by another company and it was discovered as being available for read-across. The study was identified during the Inquiry process. Measured concentrations were not reported but the EC50 was reported to be greater than the loading rate of 5029 mg/L. These data confirm the low toxicity of alkylnapthalene to aquatic invertebrates was demonstrated with the analog Alkylated Napthalene.