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Toxicity to microorganisms

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Description of key information

Key value for chemical safety assessment

EC50 for microorganisms:
100 mg/L
EC10 or NOEC for microorganisms:
100 mg/L

Additional information

In view of the use of the substances (fertilizer) and the available data on other trophic levels with the inorganic sulphates, we do not expect any of the sulfate substances to be toxic to activated sludge. In addition, sulfates are known to be important for some microorganisms - some anaerobic microorganisms use sulfates as electron acceptors. Therefore we conclude that the EC50 is above 100 mg/l for all inorganic sulphates.