Registration Dossier
Registration Dossier
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EC number: 701-199-3 | CAS number: -
Endpoint summary
Administrative data
Description of key information
Additional information
As cryolite dissociates in water and the risks are assumed to be determined by fluoride, it is more appropriate to assess the adsorption behaviour of fluoride. In a column leaching test, Koc values varying from 603 - 6502 were found for fluoride in 4 different soils, tested at cryolite concentrations varying from 5 - 50 ppm (Dykeman, 1985). As the percentage of fluoride in the molar weight in both substances is practically identical, namely 54% for cryolite and approx. 53% for aluminium potassium fluoride, similar Koc values can be expected for aluminium potassium fluoride and it is considered that aluminium potassium fluoride will show a similar behaviour in soil.
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