EDTA

Keeps the formula stable.

What it is

A compound made in a lab that binds tightly to metal ions.

Binds metal ions in water so they do not affect the product's stability or appearance.

A short summary from the dictionary, not yet an in-depth article. About these entries

Keeps the formula stableOfficial EU function: Chelating

Worth knowing · The pure substance, EU

As a pure substance it can irritate or damage skin or eyes (EU harmonised classification). How much a product contains matters.

A label gives no amounts, so none of this says a product is unsafe.