3-Aminopropane Sulfonic Acid

3-Aminopropane Sulfonic Acid is a water-soluble buffering agent that sets and holds a product's pH. Keeping formulas within a skin-friendly range helps actives stay stable and textures feel consistent batch to batch.
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Ingredient Snapshot

Overview
Keeps a formula's pH balanced so it stays gentle and consistent.
Category
Sensitive Skin
Type
Buffer

Ingredient Ratings

Overall Rating

Good

Comedogenic Risk

None

Skin Benefits

Promotes product consistency so textures apply evenly and feel balanced on skin. Helps keep sensitive-skin formulas gentle by reducing pH swings.

Uses In Skincare & Cosmetics

Common in toners, serums, and moisturizers that require precise pH control. Also used in acid exfoliants to moderate strength for a smoother application experience.

Comedogenic Rating

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

Safety

Low irritation is expected when used appropriately for pH adjustment. End products that are too acidic or alkaline may sting, so well-balanced formulas are important. Patch test if your skin is reactive.

Is 3-Aminopropane Sulfonic Acid a Good Ingredient?

Rated Good for reliable pH control and broad compatibility in water-based products. It supports other ingredients but is not a direct treatment on its own.

Products with 3-Aminopropane Sulfonic Acid

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