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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

The toxicity of the substance to aquatic algae (Desmodesmus subspicatus) was studied under static conditions and the 72 hour-EL50 > 100 mg/L was determined  and the 72 hour-NOEC ≥ 100 mg/L was calculated  (Neuhahn, 2011c).

Key value for chemical safety assessment

EC50 for freshwater algae:
100 mg/L
EC10 or NOEC for freshwater algae:
100 mg/L

Additional information

During 72 hours exposure an ErL50 and an ErL10 >100 mg/L were determined and a NOEC ≥ 100 mg/L was calculated by a multisampling comparison (according to Williams Multiple Sequential t-Test Procedure).

The results are expressed in terms of Effective Loadings (EL). As the test item is a UVCB substance and no information about the correlation between molecular weight and the structural formula of the test item are available, Water Accommodated Fractions (WAF) were used to test effects at different effective loadings and no specific analysis was performed. With the sponsor’s agreement, the content of the test item during the exposure period was verified by DOC determination.

No toxic effects against algae were observed at a test concentration of 100 mg/L.