Registration Dossier
Registration Dossier
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EC number: 232-094-6 | CAS number: 7786-30-3
Endpoint summary
Administrative data
Description of key information
Additional information
No acute or chronic toxicity data are available for the effect of magnesium chloride on terrestrial organisms (plants, invertebrates and micro-organisms). Therefore the PNECsoil was derived by the Equilibrium Partitioning method (based on PNEC water and log Kd for sediment of 2.82 L/kg dw). Because the Equilibrium Partitioning method is considered conservative and the chemical safety assessment did not identify a risk for soil organisms, it was concluded that there is no need for further experimental testing of toxicity of Mg to soil organisms.
In addition, such studies are not justified for Magnesium Chloride for the following reasons:
- Magnesium and chloride ions are ubiquitous in the environment and are found naturally in soil, water and sediment (Mg in soils/sediments are at a 50th percentile level in the range of 0.9-1.2 %). Magnesium will be assimilated by species residing in the soil and is necessary to maintain a good chemical balance in soils, water and sediment. The chloride will become part of the chloride cycle and/or be assimilated by microorganisms and other species that require chloride as an essential substance in their biological systems/ processes.
- Natural magnesium minerals are quite soluble, and so differences in bioavailability between natural magnesium sources and anthropogenic added magnesium are not expected.
For these reasons, it is expected that Magnesium chloride would not be toxic to soil organisms and hence, short-term and long-term toxicity tests to terrestrial organisms appear to be scientifically unjustified.
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