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Long-term toxicity to fish

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Description of key information

NOEC (28 d) = 0.14 mg/L (measured) related to mortality and sublethal effects

Key value for chemical safety assessment

Additional information

The assessment is based on the data currently available. New studies, based on the category review and the final decisions issued for some of the category substances, which are also relevant for this assessment, are currently being conducted. The hazard assessment with respect to aquatic toxicity will be updated once all ongoing studies have been finalised.

No chronic fish studies on toxic effects of AES (C12 -14, 1 -2.5EO) Mg are available. Therefore, a read-across approach from a comparable AES (C12 -14, 2EO) Na (CAS 68891 -38 -3) and the pure AES homologue (C14, 2EO) Na (CAS 27731-62-0) is used.

To determine the toxic effect of the AES (C12 -14, 2EO) Na a study similar to OECD guideline 215 was performed (TEGEWA, 1995). In this test juvenile individuals of rainbow trout (Oncorhynchus mykiss) were exposed to different concentrations of AES (C12 -14, 2EO) Na under flow-through conditions. Mortality and growth were determined over 28 days. Related to mortality and sublethal effects a NOEC of 0.14 mg/L (measured) was determined.

This result is supported by a non-GLP study carried out similar to OECD guideline 210, eggs of fathead minnow (Pimephales promelas) were exposed to the pure AES homologue (C14, 2EO) Na (P&G, 2004). Under flow-through conditions a NOEC (28 d) of 0.18 mg/L (measured) was determined.The NOEC based on mortality.