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Ethylenediaminetetraacetic acid (EDTA), also called EDTA acid, is an aminopolycarboxylic acid with the formula [CH 2 N(CH 2 CO 2 H) 2] 2. This white, slightly water-soluble solid is widely used to bind to iron (Fe 2+ /Fe 3+ ) and calcium ions (Ca 2+ ), forming water-soluble complexes even at neutral pH.
Tetrasodium EDTA is the salt resulting from the neutralization of ethylenediaminetetraacetic acid with four equivalents of sodium hydroxide (or an equivalent sodium base). It is a white solid that is highly soluble in water. Commercial samples are often hydrated, e.g. Na 4 EDTA. 4H 2 O. The properties of solutions produced from the anhydrous ...
The [Fe(EDTA)(H 2 O)] − anion has been crystallized with many cations, e.g., the trihydrate Na[Fe(EDTA)(H 2 O)]. 2H 2 O. [3] The salts as well as the solutions are yellow-brown. Provided the nutrient solution in which the [Fe(EDTA)(H 2 O)] − complex will be used has a pH of at least 5.5, all the uncomplexed iron, as a result of incomplete ...
Like EDTA, its sodium salt is used for water softening to remove Ca 2+. For this purpose, NTA is a replacement for triphosphate, which once was widely used in detergents, and cleansers, but can cause eutrophication of lakes. In one application, sodium NTA removes Cr, Cu, and As from wood that had been treated with chromated copper arsenate. [9]
TAE buffer is commonly prepared as a 50× stock solution for laboratory use. A 50× stock solution can be prepared by dissolving 242 g Tris base in water, adding 57.1 ml glacial acetic acid, and 100 ml of 500 mM EDTA (pH 8.0) solution, and bringing the final volume up to 1 litre.
Sodium calcium edetate (sodium calcium EDTA), also known as edetate calcium disodium among other names, is a medication primarily used to treat lead poisoning, [2] including both short-term and long-term lead poisoning. [3] Sodium calcium edetate came into medical use in the United States in 1953. [3]
Chemical formula. C 6 H 20 N 2 O 12 P 4 Molar mass: 436.13 Appearance solid Solubility in water. limited ... EDTMP is the phosphonate analog of EDTA. [1]
(S,S)-EDDS is a biodegradable chelating agent that offers an alternative to EDTA, of which 80 million kilograms are produced annually. Under natural conditions, EDTA has been found to convert to ethylenediaminetriacetic acid and then cyclize to the diketopiperazine, which accumulates in the environment as a persistent organic pollutant.