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Ecotoxicological information

Toxicity to microorganisms

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Description of key information

A test with activated sludge with a duration fo 3 hours was performed according to the OECD Guideline 209. For 77PD an EC50 of 57 mg/L was observed. Two studies performed with p-hydroquinone, a secondary hydrolysis product of 77PD, show that this substance is relatively toxic to organisms (NOEC 1 mg/L, IC50 71 mg/L).

Key value for chemical safety assessment

EC50 for microorganisms:
57 mg/L

Additional information