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Toxicity to aquatic algae and cyanobacteria

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The toxicity of thymol to aquatic algae species was determined in a test conducted according to OECD Guideline 201 (Alga, Growth Inhibition Test). A 72 h-NOEC of 1.9 mg/l and a 72 h-EC50 (growth rate) of 14 mg/l were obtained (National Institute of Technology and Evaluation, 2004).

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