What is EDTA (Free Acid) and what is it used for?

What is EDTA – the free acid:

EDTA is a White odorless, colourless crystalline powder, with a melting point of 240C at which it decomposes. It is insoluble in cold water, alcohol and general organic solvents, slightly soluble in water, soluble in sodium hydroxide, sodium carbonate and ammonia solution, soluble in boiling water. The alkali metal salts are soluble in water. EDTA(Ethylene Diamine Tetraacetic Acid) is an important complexing agent. EDTA is widely used, can be used for processing colour photographic materials bleach fixing bath washing, dyeing auxiliaries, textile processing auxiliaries, cosmetic additives, blood anticoagulant, detergent, stabiliser, synthetic rubber and polymerization initiator.

  • Synonyms: 2,2′,2”,2”’-(Ethane-1,2-diyldinitrilo)te­traacetic acid, Dissolvine Z, 2-({2-[bis(carboxymet­hyl)amino]ethyl}(car­boxymethyl)ami­no)acetic acid, Diaminoethane-tetraacetic acid, Edetic acid, Ethylenedinitrilo-tetraacetic acid, Versene; EDTA
  • Quality: 99% minimum
  • CAS No. 60–00–4
  • EC No. 200–449–4
  • Formula: (HO2CCH2)2NCH­2CH2N(CH2CO2H)2
  • Molecular weight: 292.24
  • Appearance: white crystaline solid.
  • Relative density: 0.86 g/cm3
  • Melting Point: 220C (428F)
  • Solubility: Very slightly soluble in cold water.
  • pH (1%): 2.5

Uses for EDTA :

  • Agricultural Formulations
  • Bleaching (Pulp)
  • Cleaning (Food Industry)
  • Cleaning (Hard Surface)
  • Cleaning (Industrial)
  • Cleaning (Institutional)
  • Cleaning (Metal)
  • Cleaning (Offshore)
  • Cosmetics
  • Drilling/Completion Fluids
  • Industrial Cleaning
  • Offshore Cleaning
  • Oilfield
  • Photography
  • Textile

EDTA is predominatly used in agriculture, water treatment, food processing, pulp and paper industries and also used in the manufacture of cleaners and detergents.

Chelating agents bind or capture trace amounts of iron, copper, manganese, calcium and other metals that occur naturally in many materials. Such naturally occurring metals can cause foods to degrade, chemical degradation, discoloration, scaling, instability, rancidity, ineffective cleaning performance and other problems.

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, bacteridal 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 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

R-phrase(s): R36 Irritating to eyes.

S-phrase(s): S26 In case of contact with eyes, rinse immediately with plenty of water and seek medical advice.

See MSDS for EDTA for full details.

Where to Buy EDTA online uk

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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