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Ecotoxicological information

Long-term toxicity to aquatic invertebrates

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Link to relevant study record(s)

Description of key information

One reliable (Klimisch 2) chronic toxicity tests with Mg salts was identified. A 21-d EC16 value of 82 mg Mg/L (based on added Mg dose) was observed for the effect of MgCl2.6H2O on reproduction of Daphnia magna (Biesinger and Christensen, 1972). Background concentration of the test medium was approximately 3 mg Mg/L, which corresponds to a soft water medium. The No Observed Effect Concentration (NOEC) was derived by dividing the EC16 value by a factor of two, resulting in a NOEC of 41 mg Mg/L.

Key value for chemical safety assessment

Fresh water invertebrates

Fresh water invertebrates
Effect concentration:
41 mg/L

Additional information

No data were identified for the long-term toxicity of Mg metal to aquatic invertebrates. One reliable (Klimisch 2) chronic toxicity tests with Mg salts was identified, reporting a 21-day EC16 value of 82 mg Mg/L (based on added Mg dose) for the effect of MgCl2.6H2O on reproduction of Daphnia magna (Biesinger and Christensen, 1972). No reliable data are available for the long-term toxicity of magnesium substances to marine invertebrates.