Calcium ethylenediaminetetraacetate

Disodium calcium ethylenediaminetetraacetate [39208-14-5] M 374.3, (see pKs for EDTA in entry below). Dissolved in a small amount of water, filtered and ppted with excess EtOH. Dried at 80°. 

Calcium cyanamid process, for ammonia synthesis, 11 114, 115 Calcium cyanide, 8 194-197 Calcium cyanide diammoniate, 8 195 Calcium dichromate, molecular formula, properties, and uses, 6 561t 5-Calcium disilicate monosulfate, phase in Portland cement clinker, 5 472t 5-Calcium disilicate monocarbonate, phase in Portland cement clinker, 5 472t Calcium disilicide, 4 530 8-Calcium disodium trialuminate, phase in Portland cement clinker, 5 472t Calcium doping, 23 842-844 Calcium P-alumina, 2 406t Calcium ethylenediaminetetraacetate, 7 596t... 

Chelating agents may be used to reduce the body burden after exposure. Diethyldithiocarbamate is the preferred chelating agent. D-Penicillamine and calcium ethylenediaminetetraacetate may also be effective in enhancing excretion of nickel. 

CaEDTA calcium ethylenediaminetetraacetic acid CAL Chemical (Surety Material) Accident or Incident CAIRA Chemical Accident or Incident Response and... 

Disodium-4,4 -bis (2-sulfostyryl) biphenyl. See Disodium distyrylbiphenyl disulfonate Disodium butanedioate. See Sodium succinate Disodium calcium ethylenediaminetetraacetate. See Calcium disodium EDTA Disodium caproamphodiacetate CAS 54849-16-0 68298-22-6 70750-05-9 EINECS/ELINCS 259-373-5 269-548-8 Synonyms Caproamphocarboxyglycinate Disodium N-[2-(carboxylatomethoxy) ethyl]-N-[2-[(1-oxodecylj amino] ethyl] glycinate Classification Organic compd. 

Rubin M, Gignac S, Bessman SP, Belknap EL (1953) Enhancement of lead excretion in humans by disodium calcium ethylenediaminetetraacetate. Science 117 659-660... 

Rabbits exposed to Pb(C2H5)4 (0.5 mg/L of air) are successfully protected by intravenous administration of disodium calcium ethylenediaminetetraacetate [136] no protective action is reported in another study [131]. Intravenous injection of 2-mercaptoethylamine shows a protective effect in rabbits exposed to acute and subacute quantities of Pb(C2H5)4 [124]. Desoxycorticosterone and cortisone acetate have no protective effect in subacute poisoning of rabbits [130]. 

Treatment of rabbits intoxicated with Pb(C2H5)4 by means of sodium trithiolactate and sodium thiolactate [141, 172], p-mercaptoethylamine [148], and disodium calcium ethylenediaminetetraacetate [148] is described. 

Calcium and magnesium can be titrated readily with disodium ethylenediaminetetraacetate, with Eriochrome Black T as the indicator. The solution is buffered at pH 10.0. Certain metal ions interfere with this procedure by causing fading or indistinct end points. Cyanide, sulfide, or hydroxjiamine can be used to eliminate or minimise the interferences. 

Ghelants and Precipitation Inhibitors vs Dispersants. Dispersants can inhibit crystal growth, but chelants, such as ethylenediaminetetraacetic acid [60-00-4] (EDTA), and pure precipitation inhibitors such as nitrilotris(methylene)tris-phosphonic acid [6419-19-8], commonly known as amino trismethylene phosphonic acid (ATMP), can be more effective under certain circumstances. Chelants can prevent scale by forming stoichiometric ring stmctures with polyvalent cations (such as calcium) to prevent interaction with anions (such as carbonate). Chelants interact... 

Thennodynamic inhibitors are complexing and chelating agents, suitable for specific scales. For example, for scale inhibition of barium sulfate, common chemicals are ethylenediaminetetraacetic acid (EDTA) andnitrilotriacetic acid. The solubility of calcium carbonate can be influenced by varying the pH or the partial pressure of carbon dioxide (CO2). The solubility increases with decreasing pH and increasing partial pressure of CO2, and it decreases with temperature. 

The sodium and calcium salts of EDTA (ethylenediaminetetraacetic acid, Fig. 9.3.1.) are common sequestrants in food products. A three-dimensional representation of EDTA is shown in color Fig. 9.3.2. The EDTA ion is an especially effective sequestrant, forming up to six coordinate covalent bonds with a metal ion. These bonds are so named because a lone pair of electrons on a single atom serves as the source of the shared electrons in the bond between the metal ion and EDTA. The two nitrogen atoms in the amino groups and the oxygen... 

What is the titer (expressed in milligrams per milliliter) of a solution of disodium dihydrogen ethylenediaminetetraacetate (EDTA) with respect to calcium carbonate if 17.29 mL of it was needed to titrate 0.0384 g of calcium carbonate ... 

A very important ligand (or chelating agent) for titrimetric analysis is the ethylenediaminetetraacetate (EDTA) ligand. It is especially useful in reacting with calcium and magnesium ions in hard water such that water hardness can be determined. The next section is devoted to this subject. 

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... 

Radium in hydrochloric acid solution may be separated effectively by ion exchange methods using cation exchange-resin columns. A weak HCl solution is passed through the column. The absorbed metals on the ion-exchange column are eluted with ethylenediaminetetraacetic acid (EDTA) at pH 6.25 or with ammonium citrate at pH 7.8. With either eluant, radium is eluted last, after removing barium and then lanthanum, calcium, magnesium, and other metals. 

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. 

EDETATE CALCIUM DISODIUM (ETHYLENEDIAMINETETRAACETIC ACID, EDTA)... 

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 ester function was determined by alkaline hydrolysis followed by precipitating the liberated acids as calcium salts. In the present work, samples of 1-1.5 grams were added to 50 ml. of 0.2N aqueous sodium hydroxide and refluxed with continuous stirring under nitrogen for 18-24 hours. After hydrolysis the samples were titrated to a pH of 9 with hydrochloric acid. Then 15 ml. of IN calcium acetate was added, and the sample was stirred rapidly under a stream of nitrogen for 1 hour. The suspension of calcium salt was filtered, washed with dilute base until free of excess calcium acetate as determined by titration with ethylenediaminetetraacetic acid (EDTA), and dried under a stream of nitrogen. Calcium was determined on the dried product. 

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