Registration Dossier

Data platform availability banner - registered substances factsheets

Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Endpoint summary

Administrative data

Description of key information

Additional information

FeSi is an inorganic substance and it is not biodegradable in a sense of microbiological utilization of the substance as a source of carbon and energy. The substance is expected to be highly resistant to microbiological activity, and sufficient evidence exists to show that no further biodegradability studies are needed for this substance. However, depending on conditions, the (dissolved) constituents may still be subject to biologically mediated processes leading to biotransformations. Dissolved silica (as Si(OH)4) is still subject to biologically mediated processes leading to transformations of biologically absorbed silica. The other main element, Fe, is also an essential element for most living species. Some microbes are also able to utilise Fe as an energy source and transform the oxidation state and speciation of iron.