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Ecotoxicological information

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

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 invertebrate studies on toxic effects of AES (C12 -14, 1 -2.5EO) NH4 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.