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Ecotoxicological information

Toxicity to aquatic algae and cyanobacteria

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Description of key information

The 72 hour EC50 value of C6-Pyrazole Hemisulfate to Pseudokirchneriella subcapitata for inhibition of the growth rate was 1.06 mg/L expressed as test material and based on geometric mean measured concentrations.

Key value for chemical safety assessment

EC50 for freshwater algae:
1.06 mg/L
EC10 or NOEC for freshwater algae:
0.42 mg/L

Additional information

The 72 h toxicity of C6 -Pyrazole Hemisulfate to Pseudokirchneriella subcapitata was determined according to the OECD 201 guideline and following the GLP. All the validity criteria are fulfilled. The 72 h EC50 of C6 -Pyrazole Hemisulfate to Pseudokirchneriella subcapitata for inhibition of the growth rate was 1.06 mg/L expressed as test material and based on geometric mean measured concentrations. The ErC10 was 0.42 mg/L.