2-Propenoic acid, 2-cyano-3-(4-methoxyphenyl)-3-phenyl-, 2-ethylhexyl ester

Endpoint summary

Additional information

Reliable test data generated under current guidelines are available for the three principle trophic levels: primary producers, represented by algae; plant eating animals, represented by daphnids; and predators, represented by fish. Short-term (acute) toxicity data for the freshwater species of fish, rainbow trout, indicate an LC50 value exceeding a concentration representing 100% (v/v) of a saturated solution. Long-term (chronic) toxicity data are available for the freshwater aquatic invertebrate, Daphnis magna, and for the algal species, Desmodesmus subspicatus. In daphnids, toxicity was observed at measured concentrations below the highest level that could be obtained. The lowest NOEC in this species was 0.0048 mg/L based on significantly reduced numbers of young per adult daphnid at the highest concentration tested. In algae, 72 -hour EC10, EC20 and EC50 values based on either growth rates or biomass were in excess of the highest nominal concentration attained, 0.013 mg/L. A NOEC value of 0.011 mg/L was reported in this algal study based on the measured (geometric mean) concentration at the highest level tested.

The effect of the test item on the respiration of activated sewage sludge micro-organisms gave a 3-hour EC50 of greater than 1000 mg/L (nominal concentration). The NOEC after 3 hours was 1000 mg/L.