Sodium hydroxide (lye) is a strong alkaline compound used in small amounts to adjust and stabilize the pH of cosmetic formulations. At regulated low concentrations in finished products it is considered safe, though it is corrosive in concentrated form.
| Reported effect | How often | Notes |
|---|---|---|
Skin irritation | Uncommon | More likely with high concentrations or improperly buffered formulas. |
Chemical burns | Rare | Associated with concentrated solutions, not properly formulated finished products. |
Eye irritation | Uncommon | Can occur on accidental contact with products containing it. |
Dryness or stinging | Rare | Possible on sensitive or compromised skin. |
Frequencies reflect typical cosmetic use reported in the literature, not a guarantee for your skin.