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Toxicity to microorganisms

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Description of key information

An activated sludge respiration inhibition test according to OECD 209 resulted in an EL50 > 1000 mg/L and an NOEL ≥ 1000 mg/L. After 180 min no inhibitory effects were observed.

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Additional information

To investigate potential harmful effects of tantalum pentachloride on microorganisms, an activated sludge respiration inhibition limit test was performed at concentrations of 0 mg/L (control) and 1000 mg/L according to OECD 209 and under GLP. No inhibiting effects were observed after 180 min. Hence an EL50 value of > 1000 mg/L and a NOEL of ≥ 1000 mg/L was determined.