Stearalkonium Bentonite is an organically modified clay (quaternary ammonium-treated bentonite) used in cosmetic formulations as a rheology modifier, suspending agent, and viscosity builder, particularly in non-aqueous and color cosmetic systems. It helps stabilize emulsions and prevent settling of pigments and particulates.
| Reported effect | How often | Notes |
|---|---|---|
Skin irritation | Rare | Mild irritation possible, generally associated with the quaternary ammonium component. |
Allergic contact dermatitis | Very rare | Sensitization is uncommon; clay derivatives are largely inert on skin. |
Respiratory irritation from dust | Uncommon | Relevant primarily to raw powder handling in manufacturing, not finished product use. |
Frequencies reflect typical cosmetic use reported in the literature, not a guarantee for your skin.