Trisodium Ethylenediamine Disuccinate (EDDS, 30% Solution) is a 30% aqueous solution of a readily biodegradable chelating agent used to bind trace metal ions in cosmetic formulas.

Formulators use EDDS to reduce copper- and iron-driven oxidation, discoloration, malodor, and hard-water interference in systems containing surfactants, fragrances, botanical extracts, colorants, or other metal-sensitive components. In practice it is positioned as a more biodegradable alternative to traditional EDTA-type chelators.

This liquid grade is easy to meter into the water phase. Supplier literature describes the raw material as water-soluble with an as-supplied pH around 9.0-10.5 and recommends it for shampoos, body wash, soap, skin care, oral care, and other personal-care systems where metal control supports stability.

Product Description: EDDS works by sequestering trace metals before they catalyze peroxide breakdown, fragrance drift, color change, off-odor formation, or surfactant instability. Its strongest practical value is formula protection rather than a direct skin-active claim. Supplier notes also position EDDS as a preservative-potentiating and hard-water-tolerance aid. In the Cosmetic Ingredient Review safety assessment, trisodium ethylenediamine disuccinate was concluded to be safe in present practices of use and concentration; reported maximum use concentrations were about 0.64% in leave-on hair-grooming products and 0.56% in moisturizing products.

Usage: Shampoos, body wash, liquid soap, cleansers, conditioners, skin-care emulsions and gels, oral-care products, and selected oxidative hair systems where trace-metal control improves robustness.

Mixing method:

- Add to the water phase or during aqueous make-up so the chelator is present before metal-sensitive materials are introduced.

- The solution is water-soluble and generally compatible with normal aqueous processing. The raw material is alkaline, so always re-check final formula pH after addition, especially in weakly buffered acidic systems.

- Use caution in formulas that intentionally rely on free metal ions or metal salts for performance, color, crosslinking, deposition, or antimicrobial action, because EDDS can reduce metal availability.

- EDDS may support preservative robustness by reducing metal interference, but it is not a preservative by itself; confirm any preservative optimization with challenge testing in the finished formula.

Usage rate: 0.1-2.0%

At 0.1-2.0% of this 30% solution, the delivered active EDDS level is about 0.03-0.60%. Typical use is around 0.2-0.5% for routine chelation and stability support, with higher levels reserved for difficult hard-water, oxidative, or strongly metal-sensitive systems.

Product characteristics: Clear to pale yellow liquid; characteristic odor; alkaline as supplied.

Solubility: Soluble in water; easiest to use in the water phase of shampoos, cleansers, emulsions, gels, and oral-care systems.

Storage: Store tightly closed at room temperature, protected from excessive heat and direct light. Keep the container clean and well sealed to avoid contamination and evaporation shift.