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Ecotoxicological information

Toxicity to terrestrial plants

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In accordance with column 2 of REACH Regulation (EC) No. 1907/2006, Annex IX and X, section 9.4.3 and 9.4.6, a long- and short-term toxicity to plants test, does not need to be conducted as direct and indirect exposure of the soil compartment is unlikely. Cesium ions have a very low potential to adsorb to soil (silicate minerals only). According to the available information, an input via sludge application on agricultural soil is considered to be negligible, as cesium ions do not adsorb to the sewage sludge to a significant extent. Pursuant to its physico-chemical properties, cesium ions are not expected to be distributed into soil. This similarly holds true for iodide ions which are not adsorb to soil but transferred to the ocean through groundwater and river effluent. However, for the soil compartment the iodine background concentrations are significantly higher than the iodine background concentrations in the aquatic compartments. This great difference in the background levels clearly reflects the distinctly lower toxicity potential of iodine in the soil compartment, e.g. due to the degradation via microbial activity (Please refer to the PNEC calculation for detailed information). In addition, the estimated log Pow of cesium iodide is expected to be ≤ 0 due to its salt character and good water solubility. It can be concluded, that the risk for the terrestrial compartment is low and no further information and/or testing is needed.

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