Snapshot
- Overview
- Balances a formula's pH so it feels gentler and less likely to sting.
- Category
- Sensitive Skin, Hydration
- Type
- pH Adjuster
Tetrahydroxypropyl Ethylenediamine
Tetrahydroxypropyl ethylenediamine is a water-soluble alkanolamine used as a pH adjuster and neutralizer in cosmetic products. Brands use it to fine-tune acidity, improve spreadability, and support moisture retention in water-based systems.
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Our take
Is Tetrahydroxypropyl Ethylenediamine a Good Ingredient?
It's rated Fair because its main job is adjusting and buffering pH, not delivering direct skin benefits, and any moisturizing effect depends on the rest of the formula. It can irritate, especially in leave-on products or at higher concentrations and pH, which is what holds the rating back.
What it does
Skin Benefits
Balances product pH to help formulas feel gentler and reduce potential sting. Any moisturizing effect is mostly indirect and depends on the overall formula, with limited direct evidence.
Where you'll find it
Uses in Skincare & Cosmetics
Used in toners, gels, and lightweight moisturizers as a neutralizer and buffer for skin comfort, and also present in cleansers and serums to fine-tune pH for stability and pleasant skin feel.
Before you use it
Safety
May cause stinging or irritation, particularly for sensitive or compromised skin and around the eyes. Best tolerated at the lowest effective level in well-buffered formulas; discontinue if persistent redness or burning occurs.
Products with Tetrahydroxypropyl Ethylenediamine
