What is Disodium EDTA and what is it used for?

What is EDTA Disodium:

Disodium EDTA occurs as white, odourless crystalline granules or a white to nearly white powder. It is freely soluble in water but insoluble in alcohol. It is used as sequestrant, chelating agent, stabiliser, antioxidant synergist and preservative. It is found in many cosmetics and skin care products. Chelating agents bind or capture trace amounts of iron, copper, manganese, calcium and other metals that occur naturally in many materials.

  • Synonyms: (ethylenedini­trilo)tetraace­tic acid disodium salt, disodium ethylene diamine tetraacetate, disodium dihydrogen ethylenediami­netetraacetate, Dissolvine Na2-P
  • Quality: 99% minimum
  • CAS No. 139–33–3
  • EC No. 205–358–3
  • Formula: C10H14N2Na2O8 2H2O
  • Molecular weight: 372.24
  • Appearance: white crystaline solid.
  • Melting Point: 110C (230F)
  • Solubility: Easily soluble in hot water. Soluble in cold water 100g/L @20C
  • pH (1%): 4 –5

Uses for EDTA disodium salt:

  • In the detergent industry as a stabilizer.
  • In the chemical industry as a metal carrier in redox systems.
  • In the cosmetics industry as a stabilizer for preparations.
  • In the printing industry to control hardness and as a stabilizer.

Other applications include: Agricultural Formulations, Bleaching (Pulp), Cosmetics, Electronics/Se­miconductors, Electroplating, Photography, Textile Processing, Water Softening.

In Metalworking indutries it is used for surface preparation, metal cleaning, metal plating, and in metalworking fluids.

In Cleaning products EDTA is employed to remove hard water scale, soap film, and inorganic scales. It is commonly used in a wide variety of cleaning products and formulations, including hard surface cleaners, laundry detergents, bactericdal cleaners, vehicle washes etc.

In personal care products like soaps, creams, shampoos it is used to increase effectiveness and improve stability of the products.

Other key applications for EDTA Disodium include: In Photography as a bleach in photographic film processing. In the manufacturing of paper to maximize bleaching efficiency during pulping, prevent brightness reversion, and protect bleach potency. In Scale removal and prevention – to clean calcium and other types of scale from boilers, evaporators, heat exchangers, filter cloths, and glass-lined kettles. I Water treatment – to control water hardness and scale-forming calcium and magnesium ions and to prevent scale formation.

Health & Safety

This product is not classified according to the EU regulations.

See MSDS for disodium EDTA


Where to Buy EDTA Disodium salt online UK

Where to Buy EDTA tetra sodium salt online UK


About mistralhowto

formulation chemist

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