Silica Dimethyl Silylate

Silica dimethyl silylate is silica that has been surface-treated with a dimethyl coating so it disperses more easily into oils; it's used as an anti-caking and thickening agent that keeps pressed powders from clumping and helps other ingredients stay evenly suspended. CIR reviewed it together with other silylates and surface-modified silicas and concluded it's safe as used, so long as the finished product is formulated to avoid irritating the eyes or respiratory tract.

Cosmetic information for general education, not medical advice. A verdict is a reading of the published evidence, never a guarantee for your skin: any ingredient can irritate someone, so patch test new products and see a professional if you react. Concern is graded on cited evidence, never on hazard-score lists. See how we score.