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Ecotoxicological information

Toxicity to aquatic algae and cyanobacteria

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Description of key information

ErC50 (72 h) > 100 mg a.i./L (nominal) and NOEC (72 h) = 31.3 mg a.i./L (nominal) for Pseudokirchneriella subcapitata.

Key value for chemical safety assessment

EC10 or NOEC for freshwater algae:
31.3 mg/L

Additional information

For aquatic algae no studies on toxic effects of effects AES (C9 -11, 1 -2.5EO) NH4 (CAS 160901 -27 -9) are available. Therefore, a read-across approach from the structural comparable AES (C8 -10, 1 -2.5EO) NH4 (CAS 68891 -29 -2) mixture was applied.

For AES (C8 -10, 1 -2.5EO) NH4 a GLP-study was performed according to OECD guideline 201. Based on growth rate an EC50 (72 h) > 100 mg a.i./L (nominal) for Pseudokirchneriella subcapitata was determined. The corresponding NOEC (72 h) was 31.3 mg a.i./L (nominal) (BASF, 2013).