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Ecotoxicological information

Toxicity to microorganisms

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Description of key information

The short term toxicity in microorganisms of dipotassium heptafluorotantalate was determined in activated sludge.
According to the key study (Müller & Caspers, 2000) performed to GLP and in accordance with standardised guideline EU Method C.11, the test material was shown to have an LC₅₀ of > 10,000 mg/l.

Key value for chemical safety assessment

Additional information

The key study (Müller & Caspers, 2000) is a GLP compliant study performed in accordance to the standardised guideline EU Method C.1, the equivalent of OECD 209. The study was performed to a good standard in line with sound scientific principles and was assigned a reliability score of 2, using the principles set out in Klimisch (1977). The robust study exposed activated sludgeto a range of concentrations over a 3 hour exposure time observing the inhibition of respiration. Under the conditions of the test 48.6 % inhibition of respiration was seen at a concentration of 10000 mg/l. The study determined the LC₅₀ of the test material to be ≥ 10,000 mg/l, greater than the water soulbility of the test material.