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Toxicity to microorganisms

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Description of key information

A non-guideline study was used to determine the effect of diisopropylbenzene on wastewater treatment microorganisms.

Key value for chemical safety assessment

EC10 or NOEC for microorganisms:
0.22 mg/L

Additional information

A radiorespirometric method was used to determine the compatibility of 1,3-Diisopropylbenzene with secondary waste treatment microorganisms. The procedure used microorganisms from a laboratory-maintained activated sludge unit. These microorganisms were exposed to (14C) glucose and 1,3-Diisopropylbenzene. The extent of conversion of the (14C) glucose to (14C) carbon dioxide in the presence of the test article was compared to glucose conversion without test article. Exposure to 0.22 mg/L of 1,3-Diisopropylbenzene, the highest concentration tested, had no observed inhibitory effects on the microorganisms.