Phosphoric Acid

Phosphoric acid is an inorganic, triprotic acid used in cosmetics as a pH adjuster and acidity regulator. It's added to fine-tune formula pH, support preservative performance, and keep water-based products stable and texturally consistent.
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Ingredient Snapshot

Overview
An acid used only to balance a formula's pH, not to treat skin.
Category
Tone/Texture
Type
pH Adjuster

Ingredient Ratings

Overall Rating

Fair

Comedogenic Risk

None

Skin Benefits

Keeps acidity in a skin-compatible range and supports overall formula stability. Offers no direct complexion benefits on its own.

Uses In Skincare & Cosmetics

Common in cleansers, toners, and serums to maintain consistent performance and texture across batches and uses.

Comedogenic Rating

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

Safety

Generally safe at low levels used to set pH, but may cause transient stinging or irritation if the final product is too acidic or applied to broken skin. Patch testing may help very sensitive users.

Is Phosphoric Acid a Good Ingredient?

Rated Fair: it's effective for precise pH control, but provides no direct skin benefits on its own. Over-acidification or poor buffering can also increase stinging risk, especially on sensitive or compromised skin, which is why it doesn't reach Good.

Products with Phosphoric Acid

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