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Ethylenediaminetetraacetic acid (EDTA 2Na), also known by edetic acid is an aminopolycarboxylic acid and a colorless, water-soluble solid. EDTA Disodium Salt is extensively used as a chelator of divalent cations such as Ca2+ and anticoagulant. Most of the applications are:
In the textile industry, it prevents metal ion impurities from modifying colors of dyed products.
In the pulp and paper industry, EDTA inhibits the ability of metal ions, especially Mn2+, from catalyzing the disproportionation of hydrogen peroxide, which is used in chlorine-free bleaching.
Used as a preservative or stabilizer to prevent catalytic oxidative decoloration.
In soft drinks containing ascorbic acid and sodium benzoate, EDTA mitigates formation of benzene (a carcinogen).
The reduction of water hardness in laundry applications and the dissolution of scale in boilers.
Used in the cement industry for the determination of free lime and free magnesia in cement and clinkers.