Potassium Hydroxide
What is Potassium Hydroxide?
Potassium hydroxide, chemically known as KOH, is a strong inorganic base derived from the electrolysis of potassium chloride brine. In the cosmetics industry, it falls under cleansing and conditioning agents, particularly vital in soap-making through saponification, where it reacts with fats and oils to produce soap and glycerin. Beyond soaps, it functions as a pH adjuster by increasing the alkalinity of formulations to desired levels, which supports the activity of other ingredients, boosts preservative function, and maintains overall product integrity. As a buffering agent, it resists pH changes from environmental factors or ingredient interactions, ensuring consistent performance during storage and use. Employed in trace amounts in most products, it primarily appears in rinse-off cleansers, minimizing direct skin contact.
Roles in Formulation
This ingredient serves the following purposes in cosmetic formulations:
Benefits
Helps maintain optimal pH for ingredient stability and efficacy.
Supports preservative function by adjusting formulation pH.
Contributes to product consistency as a buffering component.
Who It's For
A quick guide for who this ingredient may suit (and who should be cautious).
| Who May Benefit | Who Should Avoid |
|---|---|
| Users of bar soaps and cleansers benefiting from stable pH. | Those with highly sensitive or reactive skin. |
| Individuals seeking effective rinse-off products with balanced formulations. | Individuals prone to irritation from alkaline substances. |
| People with normal skin using alkaline-tolerant cosmetics. | Users with compromised skin barriers. |
Safety Notes
- Considered safe for cosmetic use in low concentrations per cosmetic safety reviews.
- Potential for irritation decreases in well-formulated, rinse-off products.
Frequently Asked Questions about Potassium Hydroxide
What role does potassium hydroxide play in skincare?
It acts as a pH adjuster and buffering agent to stabilize formulations and enhance performance.
Is potassium hydroxide comedogenic?
It has a comedogenic rating of 0, indicating it does not clog pores.
What is the EWG rating for potassium hydroxide?
EWG rates it between 2 and 5, depending on concentration and use.