Ingredient dictionary

Trisodium EDTA

Also listed as: Edetate Trisodium

Trisodium EDTA is a sodium salt of EDTA, a chelating agent that binds metal ions in water. Its main job is to keep those ions from upsetting a formula. It is on the label of 27 products in our library. Checked against our library November 6, 2026.

What Trisodium EDTA does

Binds metal ions in water
Helps keep formulas stable
Supports preservative performance
Helps guard against odor and color shifts

Trisodium EDTA is a salt of EDTA, a man-made chelating agent. A chelating agent is a molecule that grabs onto metal ions and holds them tightly. The sodium makes it dissolve easily in water, so it blends well into lotions, gels and sprays.

Formulators use it because metal ions are everywhere. Tap water, mineral pigments and some plant extracts can carry calcium, magnesium and iron. Left alone, these ions can cause cloudiness, odd textures or faster breakdown of other ingredients. By binding them, Trisodium EDTA helps the formula look and behave as intended. It has little scent, little color and usually leaves no noticeable feel on the skin.

Good for

Suits water-based products like lotions, sunscreens and moisturizers, where it helps the formula stay steady over time.

Frequently asked questions

Is Trisodium EDTA safe for skin?

It is widely used in cosmetics and is generally well tolerated. As with any formula, people with very sensitive skin may want to patch test a new product first.

What does Trisodium EDTA do in sunscreen?

In sunscreen, it binds metal ions that could affect how the formula looks or behaves over time. It also supports the preservatives that keep the product fresh. It does not filter UV light. That job belongs to the sunscreen filters listed on the label.