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Environmental fate & pathways

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Reaction mass of ammonium diaqua[bis(oxalate)]oxoniobate(1-) hydrate and ammonium hydrogen oxalate oxalic acid (1:1:1) dihydrate is water-soluble, dissociating readily into ammonium ions (NH+) and oxalate-niobate (V) and oxalate anions respectively. In water, the organic component, oxalate is readily mineralized by microorganisms. The inorganic component niobium undergoes hydrolytic transformation and forms various niobium hydroxyl species depending pH, temperature and ion strength of the medium. The most stable form of the hydrolysis product is Nb(OH)50 that is poorly soluble and precipitates. If taken up by organisms, each component will enter the common metabolic pathways of the cell and is thus not considered to accumulate as such within the aquatic organism. The low log Kow (-5.12) of Reaction mass of ammonium diaqua[bis(oxalate)]oxoniobate(1-) hydrate and ammonium hydrogen oxalate oxalic acid (1:1:1) dihydrate also suggests no potential for adsorption or accumulation. Due to the high water solubility (325 g/L), low adsorption and low vapour pressure (< 1 Pa), water is expected to be the main target compartment for environmental distribution.