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Ecotoxicological information

Toxicity to microorganisms

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Description of key information

EC50 3h activated sludge = 471 mg/l (loading rate) and NOEC = 31.6 mg/l (loading rate).

Key value for chemical safety assessment

EC50 or LC50 for microorganisms:
471 mg/L
EC10, LC10 or NOEC for microorganisms:
31.6 mg/L

Additional information

The influence of Tetraphosphorus trisulphide on the respiration rate of activated sludge was investigated after a contact time of 3 hours according to OECD TG 209 and the results were EC50 3h activated sludge = 471 mg/l (loading rate) and NOEC = 31.6 mg/l (loading rate).