In the salts of ethylenediamine tetra acetic acid, two sodium salt is the most important, it is an important complexing agent.

Food Industry:

Preservative (E386): Inhibits metal ion-catalyzed oxidation to extend shelf life (e.g., canned foods, beverages).

Color Stabilizer: Prevents enzymatic browning in fruits and vegetables.

Detergents:

Liquid soap, shampoo,

Cosmetics:

Stabilizer: Prevents metal ion-induced degradation in formulations (e.g., lotions, sunscreens).

Viscosity controlling, Chelating.

Pharmaceuticals & Laboratories:

Anticoagulant: Binds Ca²⁺ to prevent blood clotting in sample tubes.

Buffer Component: Used in molecular biology (e.g., DNA extraction buffers).

Industrial Water Treatment:

Scale Inhibitor: Softens water by sequestering Ca²⁺/Mg²⁺, preventing pipe scaling.