Registration Dossier

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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Endpoint summary

Administrative data

Description of key information

Based on the chemical nature of synthetic amorphous silica and silicates such as magnesium silicate (inorganic structure and chemical stability of the compound: Si-O bond is highly stable), no photo- or chemical degradation is expected.

Hydrolysis to a minor, not yet quantifiable degree is limited to a gel-layer surrounding the silica/silicate particle in aqueous medium. Thus, hydrolysis of silica was shown to be largely independent of the pH between 1.1 and 8.9, which contributes to the limited dissolution of silica/silicates in water.Therefore, similar to silica, hydrolysis is assumed to play no substantial role in the dissolution process of magnesium silicate.

Biodegradation is not applicable to these inorganic substances.

Additional information