Tetrasodium EDTA
Chelator that binds heavy-metal ions (calcium, iron, copper). In cosmetics it prevents oxidation of actives, rancidification of oils, and emulsion discolouration, and enhances preservative efficacy. Works at low concentrations – typically 0.05-0.2%. Raises ecological concerns (poor biodegradability), but alternatives such as Tetrasodium Glutamate Diacetate have emerged relatively recently.
Supporting ingredient
It gives a product its texture, stability or shelf life. It has no claimed effect on the skin, so an efficacy tier does not apply. What is known about its safety is below
Tolerability and safety
- Irritation potential
- Low
- Allergen risk
- Low
- Pregnancy
- Safe
- Suitable for
- Normal, Dry, Combination, Oily, Sensitive
About this ingredient
Tetrasodium EDTA (tetrasodium salt of ethylenediaminetetraacetic acid) is a synthetic chelator. Binds heavy-metal ions in the formula and prevents their catalytic action on oxidation. Mechanism. Forms stable complexes with calcium, iron, copper, zinc ions. Without a chelator these ions catalyse degradation of vit C, retinoids, polyphenols, and oil rancidification. Also boosts preservative efficacy and improves surfactant foaming in hard water. Where applied. Almost all emulsions, cleansers, antioxidant serums. Concentration 0.05-0.2%, near the end of the INCI list. Safety. CIR confirmed safety across all cosmetic types up to 1%. Non-sensitizing. Topical systemic absorption is minimal. Environmental controversy. EDTA biodegrades poorly in water and accumulates in the environment. The EU and US are considering restrictions for household and cosmetic products. Alternatives – Tetrasodium Glutamate Diacetate (GLDA), Trisodium Ethylenediamine Disuccinate (EDDS), sodium phytate – are biodegradable and gradually replace EDTA in clean formulas. Pregnancy and lactation – safe at cosmetic concentrations.
Frequently asked questions
Is Tetrasodium EDTA safe during pregnancy?
Tetrasodium EDTA is considered safe during pregnancy at typical cosmetic concentrations. Systemic absorption through the skin is minimal.
What skin types is Tetrasodium EDTA for?
Tetrasodium EDTA suits: normal, dry, combination, oily, sensitive.
What is Tetrasodium EDTA and what does it do in cosmetics?
Chelator that binds heavy-metal ions (calcium, iron, copper).
What's the INCI name for Tetrasodium EDTA?
The INCI name is Tetrasodium EDTA. It may also appear as: Tetrasodium Ethylenediaminetetraacetate, EDTA.
See Tetrasodium EDTA in a product composition right on the store page
The Evigrade extension adds an evidence panel to iHerb, Sephora, Druni and 12 more stores. This ingredient and every other one in the product show evidence-tier, allergen risk and pregnancy/lactation flags at a glance.
Similar role in the formula
Other functional ingredients
Tetrasodium Etidronate, Tetrasodium Glutamate Diacetate, Tetrasodium Pyrophosphate, Thiamine Diphosphate, Caramel, Glyceryl Cocoate, PEG-10 Dimethicone, PPG-14 Butyl Ether
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