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EC number: 231-104-6
CAS number: 7439-95-4
The lowest 48-h LC50 for freshwater invertebrates was observed for the acute effect of MgCl2.6H2O on Daphnia magna (Biesinger and Christensen, 1972). The lowest 48-h LC50 for marine invertebrates was observed for the acute effect of MgCl2 on the mysid shrimp Americamysis bahia (Pillard et al., 2000).
No data were identified for the acute
toxicity of Mg metal to aquatic invertebrates. Reliable studies (all
Klimisch 2) are available for the acute toxicity of MgCl2and
MgSO4(and their hydrated forms) in freshwater to the
crustaceans Daphnia magna and Ceriodaphnia dubia and the
tubificid worm Tubifex tubifex. The LC50 values range between 140
and 888 mg Mg/L. The reliable freshwater toxicity data do not differ
significantly between MgCl2and MgSO4.
One reliable study reports the short-term
toxicity of magnesium salts to marine invertebrates. As for fish, the
reliable LC50 values for marine species were higher than for freshwater
species. Pillard et al. (2000 & 2002) report 48-h LC50 values of 832,
1705 and 2650 mg Mg/L for the effect of MgCl2on the marine
mysid shrimp Americamysis bahia in artificial seawater with a
salinity of 10, 20 and 31‰, respectively. All concentrations were
reported based on added Mg doses.
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