Potassium chloride is a mineral salt used in cosmetic formulations primarily as a viscosity-controlling agent and to balance the osmotic and electrolyte properties of aqueous products. It is generally considered safe and non-active at the concentrations used in skincare.
| Reported effect | How often | Notes |
|---|---|---|
| Mild transient skin irritation | Rare | Possible with high concentrations or on compromised skin barriers. |
| Stinging on application to broken or inflamed skin | Rare | Related to its salt content and osmotic effect on open areas. |
| Allergic contact dermatitis | Very rare | Sensitization to potassium chloride in topical products is uncommonly reported. |
Frequencies reflect typical cosmetic use reported in the literature, not a guarantee for your skin.