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Environmental fate & pathways

Bioaccumulation: aquatic / sediment

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Description of key information

Bioaccumulation is not expected

Key value for chemical safety assessment

Additional information

If silicon orthophosphate is released into the aquatic environment, it dissociates rapidly to give silicon and phosphate ions (relevant pH values range from 4 – 9). The tetravalent silicon ion and the phosphate ion will then react with the media to form different silicon and phosphate species indistinguishable from natural dissolved silica- or phosphorus species. Neither silica species, nor aqueous phosphate has been assessed as bioaccumulative, nor are expected to be (OECD SIDS, 2004; OECD SIDS, 2009).

References:

OECD SIDS (2004). Synthetic amorphous silica and silicates, SIDS Initial Assessment Report for SIAM 19, Berlin, Germany, 19-22 October 2004.

OECD (2009). SIAP SIDS Inititial Assessment Profile for Phosphoric acid; CAS No. 7664-38-2; UNEP Publications.