Anionic emulsifier based on phosphorylated cetyl alcohol. Stabilizes oil-in-water emulsions and is better tolerated by skin than PEG emulsifiers. Pregnancy-safe.
Topical application
BLimited evidence. One RCT or several controlled studies with limitations.
Functional non-ethoxylated o/w emulsifier. Safety confirmed by CIR.
Potassium Cetyl Phosphate is a monoester of phosphoric acid and cetyl alcohol (C16), neutralized with potassium hydroxide. INCI: Potassium Cetyl Phosphate. Sold under the Amphisol K brand (DSM). A waxy solid. In cosmetics it works as an o/w emulsifier without ethoxylation – an important property for clean formulas that avoid PEG ethoxylates and the risk of 1,4-dioxane. It stabilizes sunscreens with mineral and chemical filters well and gives a light texture without a waxy sensorial footprint. Use levels run from 1 to 4%. Pregnancy safety. Skin absorption into the systemic circulation is minimal. CIR rates the safety profile as acceptable. Skin profile. Low irritation potential. Low allergen risk – rare for emulsifiers. Non-comedogenic. Suitable for sensitive, acne-prone skin; it is common in sunscreens and serums for atopic skin. No active effects – a functional component.
Irritation potential
LowAllergen risk
LowPregnancy
SafeSuitable for
The Evigrade extension adds an evidence panel to Wildberries, Goldapple, Letu, iHerb, Sephora and 12 more stores. This ingredient and every other one in the product show evidence-tier, allergen risk and pregnancy/lactation flags at a glance.
Potassium Cetyl Phosphate is considered safe during pregnancy at typical cosmetic concentrations. Systemic absorption through the skin is minimal.
Potassium Cetyl Phosphate suits: normal, dry, combination, oily, sensitive.
Anionic emulsifier based on phosphorylated cetyl alcohol.
On the Fulton scale 0/5 – non-comedogenic. For acne-prone skin, a rating of 3 or higher suggests choosing an alternative.
The INCI name is Potassium Cetyl Phosphate. It may also appear as: Amphisol K, Калия цетилфосфат.
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