Different applications of EDTA-2Na and EDTA-4Na

Both EDTA-2Na and EDTA-4Na are sodium salt derivatives of EDTA and possess metal ion chelating ability, but they are significantly different in their functional properties, applicable pH range, solubility, and main application areas.

EDTA-2Na Applications

1. Food Industry: As a preservative, it prevents oxidative deterioration caused by metal ions. Used in ham, sausages, surimi products, rice and flour products, etc., to improve water retention, elasticity, and yield.

2. Cosmetics: Due to its near-neutral pH, it is the most commonly used form of EDTA in cosmetics, preventing discoloration, deterioration, and vitamin C oxidation caused by metals.

3. Chemical Analysis: Used in complexometric titration to determine the content of metal ions, as an inhibitor of nucleases and proteases.

4. Oil and Fat Industry: Improves the antioxidant properties of oils and fats, preventing trace metals (iron, copper) from promoting oxidation.

EDTA-4Na Applications

1. Detergents: Liquid detergent additive, improving washing quality and enhancing detergency.

2. Textile Printing and Dyeing: Used in the dyeing industry as a water softener, counteracting metal interference and improving fabric color and brightness.

3. Water Treatment: Hard water softener, removing metal ions and hardness substances from water.

4. Pharmaceutical Field: Used in the treatment of heavy metal poisoning (forming stable complexes with heavy metals to promote excretion) and the treatment of calcification diseases. Color photosensitive/paper manufacturing: fixing solutions for washing, processing, and bleaching; metal ion masking agents.

5.Rubber industry: activators for styrene-butadiene rubber polymerization.