Ammonium Hydroxide

This is an aqueous solution of ammonia used in cosmetics as a volatile base and pH adjuster during processing. Small amounts raise alkalinity, guide neutralization for texture control, and volatilize out of the finished formula.
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Ingredient Snapshot

Overview
A pH adjuster used in processing with no direct skin benefit.
Category
Tone/Texture
Type
pH Adjuster

Ingredient Ratings

Overall Rating

Fair

Comedogenic Risk

None

Skin Benefits

Helps maintain consistent product feel and performance by fine-tuning formula pH; it offers no direct skin benefit. Can improve application quality when correctly balanced, though higher levels may increase irritation risk.

Uses In Skincare & Cosmetics

Employed during production of creams, gels, and lotions to adjust pH. Also used in hair dyes and certain styling products as a processing aid under controlled conditions.

Comedogenic Rating

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

Safety

Can irritate skin, eyes, and the respiratory tract; the irritation risk is higher in high-pH or misused formulations. In finished cosmetics it is used sparingly and often volatilizes, reducing residual exposure, but sensitive users may still experience stinging. Avoid contact with compromised skin.

Is Ammonium Hydroxide a Good Ingredient?

This rates Fair: Effective as a processing pH adjuster with no direct skin benefit, and its volatility helps limit residue in finished products. However, it carries a meaningful irritation risk, especially at higher concentrations or elevated final formula pH.

Products with Ammonium Hydroxide

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