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Ecotoxicological information

Toxicity to microorganisms

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Administrative data

Link to relevant study record(s)

Description of key information

An activated sludge respiration test giving an EC50 (3d) of 5,2mg Zn/l  (Dutka et al 1983). 

Key value for chemical safety assessment

Additional information

Several data available for this endpoint. The EC50 reported from the study by Dutka et al (1983), is giving the lowest reliable value. This study was also used in the EU risk assessment to assess the PNEC for STP.