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Ecotoxicological information

Short-term toxicity to aquatic invertebrates

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Description of key information

The 48-hour EC50 for Daphnia magna was determined to be greater than 0.013 mg/L.

Key value for chemical safety assessment

Additional information

A limit test was conducted following a preliminary range-finding test to determine the toxicity of dineodymium tricarbonate to Daphnia magna. The saturated solution was preared by stirring an excess of dineodymium tricarbonate into reconstitiuted water for 48 hours, and then filtering. Twenty daphnids were exposed to this solution for 48 hours at approximately 20 ºC. Immobilisation and any adverse reactions to exposure were recorded after 24 and 48 hours. Saturated solution analysis showed that fresh solution contained measured concentrations of 0.0155 and 0.0154 mg/L as test item. Media aged at 48 hours contained concentrations of 0.0114 and 0.0112 mg/L as test item.

The Daphnia magna 48 -hour EC50 for dineodymium tricarbonate, based on the mean measured concentration, was greater than 0.013 mg/L and correspondingly the NOEC was 0.013 mg/L. This study showed that there were no toxic effects at saturation.