Researched by Helena DeMaria-Williams
Formula IngredientPreservativePotassium Sorbate
INCI: Potassium Sorbate
Potassium sorbate is the potassium salt of sorbic acid (E202), widely used as a cosmetic preservative. It works primarily against mould and yeast by converting to its active form — sorbic acid — in the presence of water at an acidic pH (ideally pH 3–4). Because it has limited antibacterial activity, it is most effective when combined with other preservatives such as sodium benzoate or phenoxyethanol for broad-spectrum protection.
Category
Preservative
Irritation Risk
Low
Skin Types
all skin types, oily, dry, combination, sensitive, acne-prone
What does this do in a formula?
preservation, mould and yeast inhibition, product shelf-life extension
Is Potassium Sorbate safe? Key considerations
Can Potassium Sorbate cause irritation?
Low RiskPotassium sorbate is considered one of the gentler cosmetic preservatives. Rare cases of contact allergy and mild sensitisation have been reported, predominantly at higher concentrations or with prolonged repeated exposure. EU Cosmetics Regulation Annex V lists it as a permitted preservative with a maximum concentration of 0.6% (calculated as sorbic acid), which is the threshold at which safety is assured for normal cosmetic use.
Does Potassium Sorbate increase sun sensitivity?
No RiskPotassium sorbate does not increase photosensitivity. No special sun protection measures are required based on its presence in a formulation.
Is Potassium Sorbate safe during pregnancy?
SafePotassium sorbate is also an approved food additive (E202) with a long history of use. At typical cosmetic concentrations (0.1–0.6%), systemic absorption is minimal and it is generally considered safe during pregnancy. No reproductive or developmental concerns are flagged in available safety databases.
How does Potassium Sorbate work?
Potassium sorbate is the potassium salt of sorbic acid (E202), widely used as a cosmetic preservative. It works primarily against mould and yeast by converting to its active form — sorbic acid — in the presence of water at an acidic pH (ideally pH 3–4). Because it has limited antibacterial activity, it is most effective when combined with other preservatives such as sodium benzoate or phenoxyethanol for broad-spectrum protection.
Individuals with known sorbate allergy or sensitisation should review the considerations above before use.
Which products contain Potassium Sorbate?
Shop products that contain Potassium Sorbate
Omega Water Cream
Supersize Omega Water Cream
Ectoin Hydro-Barrier Serum
Biome Balancing Moisturiser
Polyglutamic Acid Serum
Fulvic Acid Cleanser
PHA Toner
PRO Itch Prone Skin Body Wash
Glycolic Acid 7% Exfoliating Toner
Argireline Solution 10%
PHA 5% Exfoliating Lip Serum
AHA 30% + BHA 2% Peeling Solution
