Potassium Benzoate

Potassium Benzoate is the potassium salt of benzoic acid, a common preservative for water-based cosmetics. It slows spoilage, extends shelf life, and helps keep formula integrity in products made at a suitably low pH.
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Ingredient Snapshot

Overview
A preservative that keeps water-based products fresh longer.
Category
Preservative
Type
Preservative

Ingredient Ratings

Overall Rating

Good

Comedogenic Risk

None

Skin Benefits

Helps inhibit microbial growth so products remain fresh and safe to use, particularly in acidic water-based formulas. Extends usability by protecting against spoilage.

Uses In Skincare & Cosmetics

Included in low-pH toners, gels, and cleansers as part of a preservation system for aqueous products.

Comedogenic Rating

This ingredient is not typically evaluated for comedogenicity, and no standardized rating is available.

Safety

Generally well tolerated at cosmetic use levels, but benzoates can cause mild stinging or irritation in some users, especially on sensitive or compromised skin. Not known to be photosensitizing; avoid application on broken skin if it tingles.

Is Potassium Benzoate a Good Ingredient?

Rated Good as a widely used preservative that helps control microbial growth in acidic, water-based systems to protect product integrity. Its efficacy depends on low pH, so it’s often paired with other preservatives.

Products with Potassium Benzoate

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