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Ecotoxicological information

Toxicity to microorganisms

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Description of key information

10 and 20 mg/L of the test substance were not inhibitory to activated sludge microorganisms in the toxicity control of the ready biodegradation test. 

Key value for chemical safety assessment

EC10 or NOEC for microorganisms:
20 mg/L

Additional information

The toxicity of the test item bis(4-tert-butylcyclohexyl) peroxydicarbonate was assessed in a five day bacterial inhibition assay using a design similar to the closed bottle test (OECD 301D). The test substance (purity: 96.1 %) was used at nominal concentrations of 10 mg/L and 20 mg/L. Non-adapted activated sludge of a predominantly industrial sewage served as inoculum. The presence of the test substance had no significant effect on the degradation of sodium benzoate, indicating that it was not inhibitory. Therefore, the 5-d NOEC for toxicity to microorganisms is considered to be 20 mg/L.