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Toxicity to soil macroorganisms except arthropods

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In accordance with column 2 of REACH Regulation (EC) No. 1907/2006, Annex IX and X, section 9.4.1 and 9.4.4, a long- and short-term toxicity test to invertebrates, 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 sulphate ion. Moreover, no toxicity of the physiological counter ion sulphate is expected. The estimated log Pow of cesium sulphate 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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