Registration Dossier
Registration Dossier
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EC number: 235-185-9 | CAS number: 12125-01-8
Adsorption / desorption
Administrative data
Link to relevant study record(s)
Description of key information
Considering that ammonia (NH3 or NH4+) is easily mineralized into nitrite ions (NO2-) by numerous bacteria. Only fluoride is relevant for this endpoint. Relevant information is reported in the EHC (2002). Fluoride strongly adsorbs to soil and is essentially immobile with very low levels of leaching.
Key value for chemical safety assessment
Additional information
The substance is readily ionised under aqueous conditions in the environment to form fluoride and ammonium ions. Ammonia (NH3 or NH4+) is easily mineralized into nitrite ions (NO2-) by numerous bacteria while fluoride ions will combine to form various inorganic fluoride salts and organic complexes. The transport and transformation of fluoride in soil are influenced by pH and the formation of predominantly aluminium and calcium complexes. Adsorption to the soil solid phase is stronger at slightly acidic pH values (5.5 – 6.5). Fluoride is not readily leached from soil
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