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What is EDTA in toothpaste?

Apr 2，2026

In toothpaste, EDTA refers to ethylenediaminetetraacetic acid, usually in the form of disodium EDTA. It is a common chelating agent that can firmly capture and bind metal ions such as calcium, magnesium and iron. Its main role in toothpaste is to stabilize the product, preventing metal ions from causing discoloration or deterioration of the paste. It also helps to chelate calcium in dental plaque and tartar, making them easier to remove during brushing, and can boost the effect of preservatives to extend the shelf life of the toothpaste.

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Ethylenediaminetetraacetic acid (EDTA) was developed by Franz Munz in Germany during the 1930s as an alternative to citric acid. EDTA is used as a food additive, in herbicides, in pharmaceuticals, and in a variety of consumer products.

Ethylenediaminetetraacetic acid

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