Medium concernChelating agent
Tetrasodium EDTA
Skin irritantEnvironmental persistence
What it is
The tetrasodium salt of EDTA, a synthetic chelating agent.
What it does
Binds metal ions to stabilise formulas, boost surfactant performance, and preserve integrity.
Why it’s a concern
EDTA is highly persistent in the environment and can remobilise heavy metals in wastewater treatment and sediment. Can enhance skin penetration of other ingredients. Generally low acute toxicity to humans; environmental load is the larger concern.
Also known as
tetrasodium ethylenediaminetetraacetate
CAS numbers
64-02-8
Commonly found in
shampoolotioncleaning products
Safer alternatives
- sodium phytate (from plant sources)
- gluconolactone
- sodium gluconate
Sources
- Environment Canada EDTA Risk Assessment