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EC number: 442-640-7 | CAS number: -
Toxicity to aquatic algae and cyanobacteria
Administrative data
Link to relevant study record(s)
Description of key information
Toxicity of Reactive Olive F00-0149 to algae was tested in a GLP and guideline study according to OECD 201. Growth inhibition was demonstrably caused by light attenuation of this coloured test substance at all test concentrations, thus no compound related growth inhibition (toxicity) occurred. No EC50 or NOEC can be established, the NOEC is ≥ 100 mg/L.
Key value for chemical safety assessment
Additional information
In a 72 hour toxicity study, cultures of Desmodesmus subspicatus were exposed to Reactive Olive F00-0149 at nominal concentrations of 0, 0.4, 0.9, 1.9, 4.3, 9.4, 20.7, 45.5, and 100 mg/L under static conditions in accordance with OECD test guideline 201. In experiment I (algae directly exposed to the test substance) EC50 and NOEC values based on growth rate were 17 and > 4.3 mg/L, respectively. In experiment II (algal growth inhibition caused only by light attenuation) EC50 and NOEC values based on growth rate were 22 and 4.3 mg/L, respectively. Comparing experiments I and II, differences in algal growth inhibition were lower than 10 % for all test concentrations.
There were no compound related phytotoxic effects. Therefore, no compound related effect levels (EC50, NOEC) can be derived. The key conclusion from this study is an NOEC for chemical effects of ≥ 100 mg/L.
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