Calcium ethylenediaminetetraacetic acid

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

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... 

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. 

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. 

Moel DI, Kumar K. Reversible nephrotoxic reactions to a combined 2,3-dimercapto-l-propanol and calcium disodium ethylenediaminetetraacetic acid regimen in asymptomatic children with elevated blood lead levels. Pediatrics 1982 70(2) 259-62. 

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. 

Strontium is a naturally occurring element found in rocks, soil, dust, coal, and oil. Naturally occurring strontium is not radioactive and is referred to as stable strontium. Stable strontium in the environment exists in four stable isotopes, " Sr (read as strontium 84), Sr, Sr, and Sr. Twelve other unstable isotopes are known to exist. Its radioactive isotopes are Sr and °Sr. Strontium is chemically similar to calcium. It was discovered in 1790. The isotope Sr is a highly radioactive poison, and was present in fallout from atmospheric nuclear explosions and is created in nuclear reactors. Atmospheric tests of nuclear weapons in the 1950s resulted in deposits and contaminations. °Sr has a half-life of 28 years and is a high-energy beta emitter. Its common cationic salts are water soluble it forms chelates with compounds such as ethylenediaminetetraacetic acid strontium coordination compounds are not common. Powdered metallic strontium may constitute an explosion hazard when exposed to flame. 

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