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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Environmental fate & pathways

Adsorption / desorption

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Administrative data

Link to relevant study record(s)

Description of key information

Adsorption of dissolved silica to soil and sediments is not strong and it is relatively mobile in soil. Adsorption takes place primarily to inorganic materials and to a lesser extent to organic material. A value Koc < 10 L/kg can be given as a coarse calculated  estimate (EUSES 2.1) . Measured Kd to activated carbon and starch were low 0.1-10. Measured Kd to minerals Bauxite, Limonite, Hematite and Goethite were between 100-1000. 

Key value for chemical safety assessment

Koc at 20 °C:

Additional information