What exactly is SAS?

SAS is the abbreviation for synthetic amorphous silica. Synthetic means that the silica was produced artificially. There are various processes available to produce different product groups: Precipitated silica and silica gels are produced from an aqueous solution; fumed silica, on the other hand, is created in a flame-based process. Both product groups belong to the amorphous silica types, which, as opposed to crystalline silica, have no orderly crystal structure. The difference between crystalline and amorphous silica types is especially important as regards breathing them in. Crystalline silica can cause silicosis, amorphous silica cannot .

Evonik produces only synthetic amorphous silica.