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Environmental fate & pathways

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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