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Ecotoxicological information

Toxicity to aquatic algae and cyanobacteria

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Description of key information

The toxicity of m-cresol to the blue-green algae Microcystis aeruginosa (Cyanaophyceae) was determined in a cell multiplication inhibition test according to the guideline DEV L9. The relevant 8d-NOEC (EC3) for growth rate is 13 mg/L.

Key value for chemical safety assessment

EC10 or NOEC for freshwater algae:
13 mg/L

Additional information

Concerning toxicity to aquatic algae there is on study using m-cresol as test substance available.

The toxicity of m-cresol to the blue-green algae Microcystis aeruginosa (Cyanaophyceae) was determined in a cell multiplication inhibition test according to the guideline DEV L9. Test conditions were as follows: continuous light, 27°C, with or without neutralization. The pH of the neutralized test solution was 7. For the endpoint biomass at the end of the test an 8 day-toxicity threshold value of 13 mg/l was obtained (nominal concentration). This toxicological threshold can also be regarded as a NOEC- or an EC3-value. For this reason the NOEC value can be given as 13 mg/l.