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Short-term toxicity to fish

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Description of key information

LC50 (96h) = 15 mg/L for Danio rerio (OECD 203, full test), read-across

Key value for chemical safety assessment

Fresh water fish

Fresh water fish
Effect concentration:
15 mg/L

Additional information

No studies investigating the short-term toxicity of sodium ethylparaben (CAS No. 35285 -68 -8) to fish are available. Therefore, toxicity data of the corresponding acid ethylparaben (CAS No. 120 -47 -8) are used as read across.

This read across approach is in accordance with Regulation (EC) No 1907/2006, Annex XI, 1.5. Grouping of substance and read across approach as is explained within the analogue justification in section 13. Except for different cations (hydrogen vs. sodium) the anions of both the source and target substance have identical chemical structures. Since dissociation of the sodium salt under environmental conditions (pH 4 - 9) yields the same ionic species as the acidic form of the substance, this read across can be considered as justified.

For the toxicity of the analogue read across substance ethylparaben the following data are available:

One study investigating the short-term toxicity of ethylparaben to fish is available. The GLP study was conducted under static conditions according to OECD 203 with Danio rerio (Kimmel, 2012). Fish were exposed to nominal concentrations of 2.5, 5.6, 12, 27 and 60 mg/L resulting in measured concentrations of 60 mg/L, 26 mg/L and 8.7 mg/L. The lowest nominal test concentrations of 2.5 and 5.6 mg/L were not analysed, since these test concentrations were below the 96 h NOEC determined in this test. The LC50 was determined to be 15 mg/L and the NOEC was determined to be 8.7 mg/L.