The Properties and Uses of Ethylenediaminetetraacetic acid disodium dihydrate (EDTA-2Na)

Ethylenediaminetetraacetic acid disodium dihydrate (EDTA-2Na) is an excellent complexing agent with a wide range of applications covering many industries such as chemical, pharmaceutical, food, agriculture and so on.

The CAS number of EDTA-2Na is 6381-92-6, and its molecular formula is C₁₀H₁₄N₂O₈Na2·2H₂O, the appearance is white crystalline powder, it is odorless, tasteless, soluble in water, and extremely insoluble in ethanol.

EDTA-2Na has a stimulating effect on the mucous membrane, upper respiratory tract, eyes and skin. In addition, EDTA-2Na can also combine with calcium ions to form a soluble complex. If EDTA-2Na is used improperly or excessively, it will affect the health , may cause  vomiting, diarrhea, and acute abdominal pain, and may also cause the loss of trace elements in the human body , Such as reducing blood calcium concentration, causing hypocalcemia.

EDTA-2Na has six coordination atoms and two crystal waters. It is an excellent chelating agent which has a strong ability to complex a variety of metal ions and separate metals. It can be used as a bleaching fixer for the processing of color photosensitive materials and Dyeing aids, fiber treatment agents, cosmetic additives, medicine, food, agricultural chemical micro-fertilizer production, blood anticoagulants, water softeners in detergents, stabilizers, synthetic rubber, polymerization initiators and heavy metal quantitative analysis agents, etc.

1. As a complexing agent: it is used to soften hard water and effectively complex a variety of metal ions in hard water, such as calcium, magnesium and iron, lead, copper, manganese, etc.; it play a greater role in cleaning aids and photosensitive chemicals , which can enhance the cleaning power, foaming power, penetration power and emulsifying power in the detergent, and can also control the concentration of ferric ions in the bleaching solution to prevent the occurrence of precipitation and improve the washing quality.

2. As a reference reagent: it is used for chemical analysis in all walks of life. It is the "Emperor" of a standard solution for chemical analysis and an indispensable benchmark for working variables in analytical testing.

3. As a stabilizer: it is used in pharmaceutical injections, it can effectively enhance the stability of the drug. The principle is that EDTA-2Na can form a stable water-soluble chelate with metal ions, can prevent its own oxidation, and is conducive to preparation, storage and Improve the stability of drugs during clinical preparation.

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