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Toxicity to microorganisms

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Description of key information

The toxicity of alpha-Terpineol to micro-organisms was determined as part of a toxicity control in a GLP-compliant OECD Guideline 310 study. Activated sludge (obtained from a wastewater treatment plant treating predominantly domestic wastewater) was exposed to 64.8 mg/L sodium acetate (positive control) with and without addition of 25.7 mg/L alpha-Terpineol. The oxygen depletion in both solutions was measured and compared. Inhibition of the degradation of sodium acetate by the addition of alpha-Terpineol did not occur. Moreover, inhibition of the endogenous respiration of the inoculum by the test substance was also not detected. The NOEC for microorganism toxicity is 25.7 mg/L.

Key value for chemical safety assessment

EC10 or NOEC for microorganisms:
25.7 mg/L

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