Benefits of Potassium Sorbate

Potassium Sorbate combines gentle, reliable antifungal preservation with broad regulatory acceptance, making it a versatile, formulator-friendly choice for low-pH water-based cosmetics.

• Effective antifungal protection: Strong activity against yeasts and molds, the most common spoilage organisms in water-based products.




• High water solubility: Dissolves readily into the water phase, far more easily than sorbic acid itself.




• Mild and well-tolerated: One of the gentlest preservatives available, with very low irritation potential at typical use levels.




• Globally approved and paraben-free: FDA GRAS for food, permitted under EU Annex V for cosmetics, and reviewed as safe by the CIR Expert Panel.




• Synergistic: Commonly paired with sodium benzoate and chelators to achieve broad-spectrum, robust preservation.

Common Applications of Potassium Sorbate

Potassium Sorbate is used across a wide range of acidic, water-based formats where gentle, paraben-free preservation is needed.

• Facial care: Toners, essences, serums, and micellar waters.




• Hair and body: Shampoos, conditioners, body washes, and low-pH lotions and creams.

Formulation Considerations

Because only undissociated sorbic acid is antimicrobially active, Potassium Sorbate must be formulated at low pH — effective below roughly pH 6 and most active near pH 4.4 — and is mainly antifungal, so it is typically paired with a partner preservative such as sodium benzoate to cover bacteria. Formulators should also note that it can cause transient, non-immunologic tingling or stinging at higher concentrations, and that it is prone to oxidation and discoloration over time; a chelator (such as EDTA) plus an antioxidant and protection from heat and light help preserve both color and efficacy.

Reference 1, Reference 4, Reference 6