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Long-term toxicity to aquatic invertebrates

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Description of key information

NOEC (21 d) for Daphnia manga = 0.27 mg a.i./L (measured) related to reproduction (OECD 211)

Key value for chemical safety assessment

EC10, LC10 or NOEC for freshwater invertebrates:
0.27 mg/L

Additional information

No chronic invertebrate 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, 2.5EO) Na and some pure AES homologues (C12, 1EO; C12, 2EO; C14, 1EO and C14, 2EO) Na salts was applied.

Effects of AES (C12 -14, 2.5EO) sodium salt mixture were examined in a non-GLP study according to OECD guideline 211 (P&G, 1977). Under flow-through conditions a NOEC (21 d) of 0.27 mg a.i./L (measured) for Daphnia magna was observed. The NOEC value was based on reproduction.

Following the procedures of the EPA-guideline 600/489/00 (which is equivalent or similar to OECD 211), individuals of Ceriodaphnia dubia were exposed under flow-through conditions in separate test systems to pure AES homologue Na salts with different chain-lengths (C12 and C14) and EO concentrations (EO1 and EO2). Based on reproduction the resulting 7-day-NOECs ranged from 0.31 mg a.i./L (measured) for C14, 2EO to 6.25 mg a.i./L (measured) for C12, 2EO.