Potassium Hydroxide
Strong base that works as a pH regulator at minimal concentrations in cosmetic formulas. After neutralizing acids, only potassium salts remain in the finished product.
Supporting ingredient
It gives a product its texture, stability or shelf life. It has no claimed effect on the skin, so an efficacy tier does not apply. What is known about its safety is below
Tolerability and safety
- Irritation potential
- Low
- Allergen risk
- Low
- Pregnancy
- Safe
- Suitable for
- Oily, Dry, Combination, Normal
About this ingredient
Potassium Hydroxide (KOH, caustic potash) is a strong inorganic base. In pure form an aggressive alkali; in cosmetic formulas it is used in micro-concentrations as a pH regulator. Where applied. Vitamin C and acid serums, cleansing gels, soaps (fat saponification), peels (0.01-1%). After acid neutralisation in the finished product only potassium salts remain – no caustic base. Safety. CIR confirmed safety at cosmetic concentrations. EU Annex III limits potassium hydroxide in hair and cuticle products (≤4.5% in solid soap, ≤2% in hair products). In finished products residual KOH is micro-quantities, neutral pH. Pregnancy and lactation – safe.
Frequently asked questions
Is Potassium Hydroxide safe during pregnancy?
Potassium Hydroxide is considered safe during pregnancy at typical cosmetic concentrations. Systemic absorption through the skin is minimal.
What skin types is Potassium Hydroxide for?
Potassium Hydroxide suits: oily, dry, combination, normal.
What is Potassium Hydroxide and what does it do in cosmetics?
Strong base that works as a pH regulator at minimal concentrations in cosmetic formulas.
What's the INCI name for Potassium Hydroxide?
The INCI name is Potassium Hydroxide.
See Potassium Hydroxide in a product composition right on the store page
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Similar role in the formula
Other functional ingredients
Potassium Olivoyl Hydrolyzed Oat Protein, Potassium Phosphate, Potassium Sorbate, Potassium Thiocyanate, Synthetic Wax, Candelilla Cera, Formaldehyde, Oryza Sativa Starch
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