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Long-term toxicity to aquatic invertebrates

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Description of key information

21-day EL50 > 103 mg/L  and 21-day NOEL > 103 mg/L  WAF   Read across data  Daphnia magna - reproduction and survival - OECD 202 TG

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Data directly evaluating the long-term adverse effects of the submission substance, naphthalene reaction products with tetradecene, to the freshwater invertebrate, Daphnia magna, are not available. However, there are data for a structurally related alkylnaphthalene, MCP 2395 (i.e, eicosanylnaphthalene analog) for read-across assessment.  The chronic toxicity of MCP 2395 as measured by the reproductive capacity of the water flea , Daphnia magna, was evaluated in freshwater. Relative to controls, the test material did not cause adverse effects to the survival/immobilization and reproduction of Daphnia magna under the WAF conditions of the 21-day test and such effects are not expected at its maximum water solubility. The 21-day LL50 (survival/immobilization) and the 21-day EL50 (reproduction) was estimated to be greater than 103 mg/L (limit test). The 21-day NOEL loading for reproduction was greater than 103 mg/L WAF.

Hence, based on the read-across data for the structurally related alkylated naphthalene surrogate, the submission substance, namely, the naphthalene, reaction products with tetradecene, is not expected to cause chronic toxicity to invertebrates at its maximum water solubility limits (if tested under WAF conditions).