Ammonium Glycolate

What is Ammonium Glycolate?

Ammonium glycolate is the ammonium salt of glycolic acid, a simple alpha hydroxy acid (AHA) with the chemical formula CH2(OH)COONH4. Synthetically produced, it appears as a white crystalline powder soluble in water. In cosmetics, it belongs to the exfoliating and pH-controlling ingredient category, commonly found in cleansers, toners, masks, and peels. It functions by partially dissociating in formulations to release glycolate ions, which chelate calcium ions in the stratum corneum, loosening bonds between dead skin cells for gentle removal. As a buffering agent, it stabilizes pH levels around 3-4, optimal for AHA activity and product preservation, while minimizing harshness compared to free acids. This dual role supports even application and controlled exfoliation in rinse-off or leave-on products, aiding formulation compatibility.

Comedogenic Rating 0/5 Low risk of clogging pores

EWG Safety Rating 1-4 View on EWG →

Roles in Formulation

This ingredient serves the following purposes in cosmetic formulations:

Exfoliant

Helps remove dead surface cells to smooth texture and enhance radiance; can be physical (particles) or chemical/enzymatic depending on the ingredient type.

PH adjuster

Raises or lowers pH to the target range, supporting ingredient performance, preservative efficacy, stability, and user comfort.

Buffering agent

Maintains the pH stability of a formulation.

Keratolytic

Promotes shedding of thickened, rough skin by loosening keratin bonds, useful in smoothing, anti-dandruff, and callus-targeting treatments.

Benefits

Provides mild exfoliation to smooth surface texture.

Adjusts and stabilizes pH for optimal formula performance.

Acts as a keratolytic to loosen rough, thickened skin areas.

Who It's For

A quick guide for who this ingredient may suit (and who should be cautious).

Who May Benefit	Who Should Avoid
Individuals with dull or uneven texture seeking gentle renewal.	People with highly sensitive or reactive skin.
Users incorporating AHAs into routines for radiance.	Individuals experiencing irritation from alpha hydroxy acids.
Those preferring stable, balanced pH in exfoliating products.	Those with compromised skin barriers or active dermatitis.

Safety Notes

Rated low to moderate concern by safety databases for cosmetic use.
Patch testing recommended before full application.

Frequently Asked Questions about Ammonium Glycolate

What does ammonium glycolate do in products?

It exfoliates gently, adjusts pH, and buffers formulas for stability and comfort.

Is it suitable for beginners?

Yes, its salt form makes it milder than pure glycolic acid for new AHA users.

How does it differ from glycolic acid?

As an ammonium salt, it releases the acid more gradually, reducing potential sharpness.