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Diss Factsheets

Environmental fate & pathways

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Due to the hydrolysable nature of disodium hexafluorosilicate, bioaccumulation cannot be assessed.

The accumulation and metabolism behaviour of the main species present in aqueous solutions have been reviewed in the Environmental Health Criteria (IPCS/WHO, 1994 and IPCS/WHO, 2002). Inorganic fluorides tend to accumulate preferentially in the skeletal and dental hard tissues of vertebrates, exoskeletons of invertebrates and cell walls of plants (Hemens & Warwick, 1972; Davison, 1983; Michel et al., 1984; Kierdorf et al., 1997; Sands et al., 1998). In addition, accumulation of fluoride is considered in the risk assessment of HF (EU, 2001).