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Short-term toxicity to aquatic invertebrates

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Description of key information

The substance is not acutely toxic to invertebrates up to the maximum water solubility.

Key value for chemical safety assessment

Additional information

In a GLP guideline study following OECD 202 Daphnia magna were exposed for 48 hours to a saturated solution of tris-2 -ethylhexylamine (limit test with a nominal concentration of 100 mg/L). Analytical monitoring could not be performed since the limit of quantification was above the water solubility of approx. 0.002 mg/L. All reasonable efforts were taken to produce a saturated solution of the test substance in test media, following the guidance in OECD 23. According to OECD 23, for tests with chemicals that can not be quantified by analytical methods at the concentrations causing effects, the effect concentration can be expressed based on the nominal concentrations. Undissolved test material was not removed. The daphnids were exposed to the total load of the test substance using an organism chamber in the test vessel. No adverse effects on the test organisms were observed. Based on nominal concentrations, the 48-h EC50 for effects on Daphnia is > 100 mg/L (BASF SE, 2010). Additional studies are available (BASF, 1984 a, b; BASF, 2007) which were not considered due to physical effects (daphnids were entrapped at the surface of the test vessels).

In conclusion, the susbtance is nosidered to be not acutely harmful to aquatic invertebrates up to the maximum water solubility.