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Ecotoxicological information

Long-term toxicity to fish

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Description of key information

NOEC (28 d) for Oncorhynchus mykiss = 0.14 mg/L (measured) related to mortality and sublethal effects (similar to OECD 215)

Key value for chemical safety assessment

EC10, LC10 or NOEC for freshwater fish:
0.14 mg/L

Additional information

No chronic fish studies on toxic effects of AES (C12 -14, 1 -2.5EO) NH4 (CAS 125301 -88 -4) 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 a.i./L (measured) was determined.The NOEC based on mortality.