Registration Dossier
Registration Dossier
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EC number: 232-146-8 | CAS number: 7789-18-6
Toxicity to soil microorganisms
Administrative data
Link to relevant study record(s)
Description of key information
In accordance with column 2 of REACH Regulation (EC) No 1907/2006, Annex IX, section 9.4, a toxicity test to soil microorganisms does not need to be conducted as direct and indirect exposure of the soil compartment is unlikely
Besides the natural background exposure, no relevant exposure of the terrestrial compartment is to be expected as cesium ions have a very low potential to adsorb to soil (silicate minerals only). According to the available data, an input via sludge application on agricultural soil is considered to be negligible, as cesium does 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. Cesium nitrate is very soluble in water where it completely dissociates and forms cesium cations and nitrate anions. Nitrate is an important plant nutrient which is naturally produced as part of the nitrification process in soil and which is applied as part of nitrogen fertilizers to agricultural soil. The log Pow value of cesium nitrate is estimated to be very low as expected for an inorganic crystalline compound.
It can be concluded, that the risk for the terrestrial compartment is low and no further information and/or testing is needed.
Key value for chemical safety assessment
Additional information
Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.
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