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Ecotoxicological information

Toxicity to microorganisms

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Description of key information

One reliable toxicity data point (Klimisch 1, GLP) has been identified for micro-organisms; a respiration inhibition test with activated sludge. Based on total amount of Sr added to the test solution, a  3h-IC50 and 3h-NOEC of >41.4 and >=41.4 mg Sr/L, respectively,  was reported by Desmares-Koopman (2010), using  Sr(NO3)2 as test substance.

Key value for chemical safety assessment

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

Additional information

One reliable toxicity data point (Klimisch 1, GLP) with activated sludge from a (predominantly) domestic sewage plant has been reported by Desmares-Koopman (2010). Inhibition of respiration was the endpoint under consideration.

At a nominal concentration of 100 mg Sr(NO3)2/L, no inhibition of the respiration rate was noted. Therefore - expressed as mg Srtotal/L, the 3h-IC50 and 3h-NOEC were >41.4 and >=41.4 mg/L, respectively.