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Diss Factsheets

Ecotoxicological information

Toxicity to aquatic algae and cyanobacteria

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Administrative data

Link to relevant study record(s)

Description of key information

With high probability acutely not toxic to aquatic algae.

Key value for chemical safety assessment

EC50 for freshwater algae:
313 mg/L
EC10 or NOEC for freshwater algae:
50 mg/L

Additional information

In a GLP guideline study according to OECD 201 the EC50 value on the growth rate of the green algae Raphidocelis subcapitata was determined to be 313 mg/L (Rohm and Haas, 2007, 06RC-262). The NOEC was observed to be 50 mg/L.

The study was conducted without chemical analysis, however, from the available studies on fish and aquatic invertebrates, conducted with analytical monitoring (BASF AG, 1996, 96/0251/50/1; Rohm and Haas, 2007, R2007NC003-01, BASF AG, 1996, 96/0251/50/1), it can be concluded that the test substance is stable in static test systems for at least 96 hours. Moreover, the stability of the test substance in the test medium is considered to be stable over the exposure period based on a sufficient water solubility of 14 g/L (BASF, 2012, 11L00357), a low Henry's Law constant of 0.933 Pa*m3/mol (HENRYWIN v3.20, EPI Suite v 4.11, BASF, 2022) and a low adsorption potential (log Kow = 1.8, BASF, 2012, 11L00357; log Koc = 1.0, MCI model of KOCWIN v2.00, EPISuite v4.11, BASF SE, 2022).

Based on results of this study the tested substance is considered as acutely not harmful to algae.