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Short-term toxicity to aquatic invertebrates

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Description of key information

Tris(2,4-di-tert-butylphenyl)phosphite is with high probability acutely not harmful to aquatic invertebrates.

Key value for chemical safety assessment

Additional information

A 24 hour static toxicity study withDaphnia magna carried out according to OECD guideline 202 [Ciba, 1988].The exposure concentrations were greatly in excess of the water solubility and the concentrations were not measured. The test solutions were prepared with alkylphenol polyglycol ether as solubiliser.

No increase in the number of immobile daphnids compared with controls were evident in groups exposed to 32, 58, 100 or 180 mg/l. An increase in the number of immobile daphnids compared at higher concentrations may be caused by physical effects of undissolved test materials. Overall, it can be concluded that the results do indicate that the substance is not acutely toxic to Daphnia magna at the limit of water solubility.

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