Tetrasodium EDTA is a synthetic, water-soluble chelating agent commonly used in cosmetic formulations to bind and neutralize multivalent metal ions. In skincare, it enhances formula stability by preventing metal-catalyzed oxidation of emulsifiers and active compounds, preserving product efficacy and shelf life. It also improves cleansing efficacy by reducing metal-associated surfactant interference and ensuring better foam and spread.
In haircare, Tetrasodium EDTA helps mitigate water hardness by sequestering calcium and magnesium ions, which, if left unchecked, can leave mineral buildup on hair shafts, leading to dullness, dryness, or decreased manageability. By preventing soap-insoluble metal deposits, it supports improved hair slide, shine, and ribbing control in shampoos and conditioners. Additionally, its chelating action enhances scalp tolerance by minimizing metal-induced irritation or sensitivity.
Quick Insights
Ingredient Rating:
GOOD
Type of Ingredient:
Texture Enhancer, Barrier Support and Chelating Agent
Intended Function:
Bind trace metal ions to prevent formulation degradation and buildup in skin/hair applications.
Common Applications:
Utilized in cleansers, emulsions, toners, anti-aging creams, masks, shampoos, conditioners, and leave-on treatments to ensure product clarity, longevity, and performance.
Target Audience:
Ideal for manufacturers targeting premium skincare and haircare markets emphasizing product stability, clarity, and long-term efficacy — especially in hard-water regions or metallic container formats.
Also Known As:
Tetrasodium Ethylenediaminetetraacetate, EDTA-4Na.
Safety Analysis
At cosmetic concentrations (typically ≤ 0.1%), Tetrasodium EDTA is regarded as safe, non-irritating, and non-sensitizing for topical use. It does not penetrate the skin significantly, and toxicity is minimal at standard usage levels. Environmental concerns regarding biodegradability have been raised, but modern wastewater treatment manages EDTA effectively. For highly eco-conscious brands, consider alternatives like sodium gluconate in select formulations.
References
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