Ethylenediaminetetraacetic disodium salt

EDTA solution CioHi4N2Na208 2H2O, 0.025 mol/L for samples with S<20. Dissolve 18.61 g of ethylenediaminetetraacetate (disodium salt, dihydrated, analytical-reagent grade, a.g.) dried at 50 °C for 1 h) in distilled water and dilute to 2000 mL. Determine the exact titre by standardization with the magnesium standard solution. 

A method suitable for analysis of sulfur dioxide in ambient air and sensitive to 0.003—5 ppm involves aspirating a measured air sample through a solution of potassium or sodium tetrachloromercurate, with the resultant formation of a dichlorosulfitomercurate. Ethylenediaminetetraacetic acid (EDTA) disodium salt is added to this solution to complex heavy metals which can interfere by oxidation of the sulfur dioxide. The sample is also treated with 0.6 wt % sulfamic acid to destroy any nitrite anions. Then the sample is treated with formaldehyde and specially purified acid-bleached rosaniline containing phosphoric acid to control pH. This reacts with the dichlorosulfitomercurate to form an intensely colored rosaniline—methanesulfonic acid. The pH of the solution is adjusted to 1.6 0.1 with phosphoric acid, and the absorbance is read spectrophotometricaHy at 548 nm (273). 

Metal Content. Two common analytical methods for determining metal content are by titration and by atomic absorption spectrophotometry (aas). The titration method is a complexiometric procedure utilizing the disodium salts of ethylenediaminetetraacetic acid (EDTA). The solvent, indicator. 

From this material, samples are cut and swelled to constant weight in a buffered saline solution prepared from 8.43 g sodium chloride (NaCl), 9.26 g boric acid (H3BO3), 1.0 g sodium borate (Na3B03), and 0.1 g of the disodium salt of the dihydrate of ethylenediaminetetraacetic acid [Na2 EDTA -(/ 0)21 ini L of distilled water. 

Corynantheidol (255) has been prepared by Hanaoka et al. (155), who started from piperideine derivative 268 and tryptophyl bromide (197). The key cyclization step, resulting in indolo[2,3-a]quinolizine 270 as the major product besides 271, was carried out by mercuric acetate oxidation in the presence of the disodium salt of ethylenediaminetetraacetic acid (EDTA), followed by sodium borohydride reduction. Finally, lithium aluminum hydride reduction of 270 provided ( )-corynantheidol in good yield (155). 

Ethylenediaminetetraacetic acid is frequently symbolized H4Y, and the disodium salt, Na2H2Y. The hydrogens in these formulas are the acidic hydrogens associated with the carboxyl groups, as in any weak organic carboxylic acid they dissociate from the EDTA ion in a series of equilibrium steps ... 

Ethylenediaminetetraacetic acid, calcium disodium salt hydrate [23411-34-9] Fenpropidin [67306-00-7] Fenpropimorph [67564-91-4] Flupropadin 81613-59-41 Haloperidol [52-86-8] 1605D EV7700000, USP EU1575000, USP... 

Ethylenediaminetetraacetic acid disodium salt dehydrate (EDTA) buffer solution... 

Salt and chelate formation with edetate (ethylenediaminetetraacetate, EDTA). A In a solution of calcium disodium salt of EDTA, the sodium and hydrogen ions are chemically and biologically available. B In solutions of calcium disodium edetate, calcium is bound by coordinate-covalent bonds with nitrogens as well as by the usual ionic bonds. C In the lead-edetate chelate, lead is incorporated into five heterocyclic rings. 

Ethylenediaminetetraacetic acid (Figure 57-2) is an efficient chelator of many divalent and trivalent metals in vitro. To prevent potentially life-threatening depletion of calcium, the drug should be administered only as the calcium disodium salt. 

The disodium salt of ethylenediaminetetraacetic acid, also known as EDTA, has a great affinity for lead ions, Pb2+. Why Can you think of any useful applications of this chemistry ... 

Weigh 0.5 g propyl gallate (0.5% final) and 0.5 g ethylenediaminetetraacetic acid, disodium salt dihydrate (EDTA 0.5% final) into a 100-ml volumetric flask, dissolve crystals in a small volume of 1 1 (v/v) ethanol/water and dilute to mark with ethanol/water solution. Prepare fresh daily. 

Iion(II) ethylenediaminetetraacetic acid [15651 -72-6], Fe(EDTA) or N,.NM,2-ethanediylbis[IV-(carboxymethyl)glycinato]ferrate(2—), is a colorless, air-sensitive anion. It is a good reducing agent, having E° = —0.117 V, and has been used as a probe of outer sphere electron-transfer mechanisms. It can be prepared by addition of an equivalent amount of the disodium salt, Na2H2EDTA, to a solution of iron(II) in hydrochloric acid. Diammonium [56174-59-5] and disodium [14729-89-6] salts of Fe(EDTA) 2— are known. 

EDTA solution 0.05 M 1.85 g ethylenediaminetetraacetic acid disodium salt in water to 100 mL. 

Acetoxy-2-methylpropanoyl bromide (S)-(-)-2-Acetoxypropionyl bromide Poly-4-vinylpyridine Palladium on charcoal Ethylenediaminetetraacetic acid disodium salt dihydrate (Fluka)... 

SAFETY PROFILE Poison by intraperitoneal route. A skin and eye irritant. When heated to decomposition it emits toxic fumes of NOx and Na20. See also ETHYLENEDIAMINETETRAACETIC ACID, DISODIUM SALT. 

ETHYLENEDIAMINETETRA CETIC ACID, DISODIUM SALT see EIX500 ETHYLENEDIAMINETETR.AACETIC ACID, TETRASODIUM SALT see EIVOOO ETHYLENEDIAMINETETRAACETIC ACID, TRISODIUM SALT see TNL250 ETHYLENEDIAMMONIUM CHLORIDE see EIWOOO... 

Oxidative cyclization. The final step in a synthesis of racemic ajmalicine (2) required oxidative cyclization of (I). This reaction was carried out in 2.5% aqueous acetic acid with an excess of 1 1 mercuric acelale-ethylenediaminetetraacetic acid disodium salt (EDTA, I, 373-374) followed by sodium borohydride reduction of iminium intermediates. 

Disodium EDTA disodium ethylenediaminetetraacetate edathamil disodium edetate disodium edetic acid, disodium salt. 

Ethylenediaminetetraacetic acid, disodium salt [139-33-3] Disodium ethylenediaminetetraacetate dihydrate [6381-92-6]... 

Synonyms calcium disodium edetate calcium disodium ethylenediaminetetraacetate calcium disodium (ethylene-dinitrilo)tetraacetate E385 edathamil calcium disodium edetic acid calcium disodium salt EDTA calcium ethylene-diaminetetraacetic acid calcium disodium chelate [(ethyl-enedinitrilo)tetraacetato]calciate(2-) disodium sodium calciumedetate Nersene CA. 

Chelation therapy is usually the treatment of choice. Both CaNai-EDTA (calcium disodium salt of ethylenediaminetetraacetic acid) and British Antilewisite compound (BAL 2,3-dimercaptopropanol) are commonly used to remove lead from the body. Both are administered via intramuscular injection. BAL binds lead to sulfhydral groups and chelates metal from both inside and outside the cellular space. Lead removal through the bile and urine is increased within 30 min of administration. BAL is the common choice when there is known toxicity to the kidney, but it is contraindicated if there is liver failure or glucose-6-phosphate dehydrogenase deficiency. BAL treatment has produced a number of adverse reactions, including nausea, vomiting, tachycardia, and fever. 

Many symptoms of manganese toxicity disappear after the victim is removed from the source of exposure. L-Dopa (levodopa) can reverse some symptoms, but complete recovery is not expected. Calcium-EDTA (the calcium disodium salt of ethylenediaminetetraacetic acid) will help improve an acute manganese-induced psychosis. 

Some of the effects of toxic chemical mixtures on soil pollution are predictable. Acidic soils dissolve otherwise insoluble metal oxides and salts, thereby increasing available metal concentrations and toxicity to flora and fauna. Available copper content is inversely proportional to increased pH of soiU4 Earthworm mortality in soil polluted by lead increases as pH decreases. I15l The addition of ethylenediaminetetraacetic acid (EDTA) and its disodium salt to soil contaminated with cadmium, lead, and zinc increases the availability of these metals to plants and results in significant increases in the uptake of these in plants. I25l... 

Ethyl diazoacetate, 228-230,325 Ethyl diethoxyacetate, 230 Ethyldiisopropylamine, 230,368 Ethyl (3,0-dimethylacrylate, 249 l-Ethyl-3-(3 -dunethylaminopropyl)carbo-diimide hydrochloride, 26 Ethyl l,3-dithiane-2-carboxylate, 230-231 Ethylene, 11 Ethylene carbonate, 41 Ethylenediamine, 231,488 Ethylenediaminetetraacetic acid, 204 Ethylenediaminetetraacetic add disodium salt, 321... 

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