Tin dioxide (stannic oxide) is an inorganic mineral used in cosmetics primarily as an opacifying agent and to enhance the color, sparkle, or coverage of pigments, often as a coating or carrier for other colorants. It is considered a base/formulation ingredient rather than a therapeutic active.
| Reported effect | How often | Notes |
|---|---|---|
Skin irritation | Rare | Generally considered inert and well tolerated topically; mild irritation uncommonly reported. |
Allergic contact dermatitis | Very rare | Sensitization to tin compounds is infrequently documented. |
Eye irritation | Rare | Possible mechanical or mild irritation if powder contacts the eyes. |
Frequencies reflect typical cosmetic use reported in the literature, not a guarantee for your skin.
Peer-reviewed papers on this ingredient, via PubMed.