Snapshot
- Overview
- A preservative that keeps formulas fresh by limiting yeast and mold.
- Category
- Preservative
- Type
- Preservative
Potassium Sorbate
Potassium Sorbate is the potassium salt of sorbic acid, a water-soluble, pH-dependent preservative. Formulators use it to keep products fresh by limiting yeast and mold growth in suitably acidic formulas.
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Our take
Is Potassium Sorbate a Good Ingredient?
It's a reliable, water-soluble preservative that effectively suppresses yeast and mold in acidic formulas, extending shelf life with generally low irritation, which is enough for a Good rating. Its performance is pH-dependent, so efficacy is strongest in lower-pH products.
What it does
Skin Benefits
Helps keep formulas fresh longer by discouraging spoilage from microbes. Supports product safety so textures and scents stay pleasant over time.
Where you'll find it
Uses in Skincare & Cosmetics
Common in water-based products like toners, gels, and moisturizers to preserve stability. Frequently included in serums and cleansers that are stored for extended periods.
Before you use it
Safety
Typically well tolerated at cosmetic use levels, though it may cause mild stinging or redness on sensitive or compromised skin. Best used in acidic systems; higher concentrations can increase irritation. In the EU, sorbic acid and its salts are permitted up to 0.6% (as acid equivalent).
Learn more
Frequently Asked Questions
Find answers to some of the most frequently asked questions about potassium sorbate.
References
Products with Potassium Sorbate
