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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

Coal-tar pitch does not exhibit acute toxicity to aquatic microbial lifeforms. Hence no EC50 is determinable. 

Key value for chemical safety assessment

Additional information

For reasons of deriving a PNEC for STP, the impact of creosote on activated sludge was adopted as surrogate for mixed aromatic compounds and PAHs: the EC0 was found to be 36 mg/l (nominal).