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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Ecotoxicological information

Toxicity to microorganisms

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Administrative data

Link to relevant study record(s)

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.

Key value for chemical safety assessment

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.