Registration Dossier
Registration Dossier
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EC number: - | CAS number: -
Endpoint summary
Administrative data
Description of key information
Additional information
Hydrolysis:
All molecules of the reaction mass ionise under aqueous conditions in the environment to form cesium, potassium, aluminium and fluoride ions which will combine to form various inorganic salts and organic complexes. Since hydrolyses changes the chemical form but does not decompose cesium potassium fluoroaluminate, the concept of degradation by hydrolysis is not relevant in the consideration of its environmental fate.
Biodegradation:
The concept of biodegradation does not apply to inorganic substances.
Bioaccumulation:
Due to the dissociation behaviour of cesium potassium fluoroaluminate, its bioaccumulation cannot be assessed. Given its ionic nature, cesium potassium fluoroaluminate is expected to partition favourably to water rather than organic and fatty media.
Adsorption/desorption:
No significant sorption behaviour is to be expected for cesium potassium fluoroaluminate as the substance dissociates into various ions. The following information is available on bioaccumulation of cesium and fluoride ions. For cesium the lowest Kd value was 0.6 L/kg for a measurement made on a system containing a soil consisting primarily of quartz, kaolinite, and dolomite and an aqueous phase consisting of groundwater with a relatively high ionic strength (I. 0.1 M). The largest cesium Kd values was 52,000 L/kg for a measurement made on a pure vermiculite solid phase . The average cesium Kd value was 2635 ± 530 L/kg. For fluoride a Koc value of 3.16 is calculated based on a log Kow of -1 in EUSES (in the EU-RAR for hydrogen fluoride a log Kow of -1.4 is suggested). From the data available for aluminium and potassium, no actual Kd and/or Koc values can be determined.
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