Sodium ethylenediamine tetraacetate

Sodium-ethylenediamine tetraacetic acid (EDTA) Disodium hydrogen phosphate 0.35 mg 13.3 mg Ascorbic acid 12 mg... 

Calcium fluoride (fluorspar) CaF2 is a very stable compound. The easiest way to decompose this is to mix the finely powdered sample with silica (or broken glass), and heat the mixture with concentrated H2SO4 in a platinum crucible. Silicon tetrafluoride gas is formed and can be detected (cf. Section 4.17, reaction 1). The residue contains calcium sulphate. This can be extracted with 5% sodium ethylenediamine tetraacetate in the presence of 2m ammonia, and calcium ions can be tested for in the solution (cf. Section 3.33). 

Sodium ethylenediamine tetra-acetate (5%). Dissolve 5 g sodium ethylenediamine tetraacetate dihydrate, [CH2N(CH2COOH) CH2 COONa]2-2H20 (Na2EDTA), in water and dilute to 100 ml. 

Synonyms Acetic acid, (ethylenedinitrilo) tetra-, tetrasodium salt Edathanil tetrasodium Edetate sodium Edetic acid tetrasodium salt EDTA Na4 EDTA sodium salt EDTA tetrasodium salt N,N -1,2-Ethanediylbis (N-(carboxymethyl)) glycine tetrasodium salt Ethylenebis (iminodiacetic acid) tetrasodium salt N,N -Ethylene-diaminediacetic acid tetrasodium salt Ethylenediaminetetraacetic acid, sodium salt Ethylenediaminetetraacetic acid, tetrasodium salt Sodium ethylenediamine-tetraacetate Tetrasodium edetate Tetrasodium ethylenediamine tetraacetate Tetrasodium (ethylenedinitrilo) tetraacetate ClassiTication Substituted amine Definition Powdered sodium salt that reacts with metals Empirical C, jH,2N208 4Na Formula (NaOOCCH2)2NCH2CH2N(CH2COONa)2 Properties Wh. amorphous powd. freely sol. in water m.w. 380.20 dens. 6.9 lb/ gal m.p. > 300 C... 

Ethylenediamine tetraacetic acid (EDTA) [60-00-4] (Sequestrene), an anticoagulent at 1 mg of the disodium salt per mL blood, complexes with and removes calcium, Ca ", from the blood. Oxalate, citrate, and fluoride ions form insoluble salts with Ca " and chelate calcium from the blood. Salts containing these anticoagulants include lithium oxalate [553-91-3] 1 mg/mL blood sodium oxalate [62-76-0]2 mg/mL blood ... 

The perturbation of monolayers with agents (e.g., disodium ethylenediamine tetraacetate, Ca+2-free medium, sodium citrate, cytochalasin D) to open tight junctions and the effect on the transmonolayer flux of permeants are addressed in this section. It has been observed that permeants taking predominantly the trans-cellular route are not affected by perturbants of the paracellular route, compared to extracellular or relatively hydrophilic permeants (Artursson and Magnusson, 1990). Let us put these general observations into a quantitative intepretation in the light of the transmonolayer kinetic studies of steroids in this section and of paracellular permeants in Section III. There are three cases to consider (1) ABL-controlled permeants, (2) monolayer-controlled permeants transported principally by the transcellular route, and (3) monolayer-controlled permeants for which the paracellular route dominates. 

We could not find any study of Bi(III) ions in aqueous solutions except that Wang et al. [132] obtained nanorods of bismuth sulphide by sonicating an aqueous solution of bismuth nitrate and sodium thiosulphate in the presence of complexing agents such as ethylenediamine tetraacetic acid, triethanolamine and sodium tarta-rate. Similar results were found when thioacetamide was used in place of sodium thiosulphate as a source of sulfur. However, the results improved with higher yield... 

Charge item 1, sucrose, D-mannitol, saccharin sodium, and disodium ethylenediamine tetraacetate in an agitating granulator. 

Tris(hydroxymethyl)methylamine (TRIS), sodium chloride, sodium citrate, ethylenediamine tetraacetic acid disodium salt (EDTA), lithium chloride, Tween 20, streptavidin 10 nm colloidal gold labelled, hydrochloric acid (37%), nitric acid, streptavidin-coated paramagnetic beads (MB) with a diameter of 2.8 pm, Dynabeads M-280 Streptavidin (Dynal Biotech, Oslo, Norway) biotinylated probe oligonucleotides which sequences are shown in Table 53.1. 

Magnesium stearate, stearic acid, sodium stearyl fumarate Hypromellose, hydroxypropyl cellulose, methylcellolose Ethylenediamine tetraacetic acid, butylated hydroxy toluene Sodium lauryl sulfate, Polysorbate 80 (Tween 80) Cyclodextrins, ethyl alcohol, propylene glycol D-a-Tocopheryl polyethylene glycol 1000 succinate, oleic acid... 

The difficulty in obtaining this monomer in the pure state arises from the fact that the known methods of preparation involve the simultaneous formation of considerable amounts of the isomers of spiropentane which are difficult to remove. The method adopted as giving the most satisfactory yields is that of Applequist, Fanta, and Henrickson (I, 2). The spiropentane is prepared by reaction of zinc dust with pentaerythrityl tetrabromide in alcohol in presence of the sodium salt of ethylenediamine-tetraacetic acid as complexing agent. The yield of hydrocarbon (spiropentane plus various ethylenic compounds) is of the order of 84%. The spiropentane is obtained in the pure state by treating the mixture with bromine in dibromomethane. The yield of pure spiropentane was found to be 62%. 

For the styrene/hexadecane system, the amount of initiator does not have an effect on the particle number, but in the case of more water-soluble monomers, for example MMA and vinyl chloride [67], secondary particle formation was observed. Here, the amount of new particles increases with the concentration of the water-soluble initiator. Homogeneous nucleation in the water phase can be restrained by using a water-soluble redox initiator, e.g., (NH4)S208/NaHS03 at lower temperature (45°C) [68] or even more efficiently by using an interfacial acting redox initiator (cumene hydroperoxide/Fe2+/ethylenediamine tetraacetate (EDTA)/sodium formaldehyde sulfoxylate (SFS)) [69, 70] to initiate the miniemulsion polymerization. The hydrophobic radicals decrease the homogeneous nucleation in the aqueous phase. 

The isolation of bacterial DNA described in this experiment, patterned after the work of Marmur (1961), accomplishes these objectives. Bacterial cells are disrupted by initial treatment with the enzyme, egg-white lysozyme, which hydrolyzes the peptidoglycan that makes up the structural skeleton of the bacterial cell wall. The resultant cell walls are unable to withstand osmotic shock. Thus, the bacteria lyse in the hypotonic environment. The detergent, sodium dodecyl sulfate, (SDS, sodium do-decyl sulfate) then completes lysis by disrupting residual bacterial membranes. SDS also reduces harmful enzymatic activities (nucleases) by its ability to denature proteins. The chelating agents, citrate and EDTA (ethylenediamine tetraacetic acid), also inhibit nucleases by removing divalent cations required for nuclease activity. 

Sodium iron(III) ethylenediamine tetraacetic acid complex 4.2... 

FIG. 8.13 Sequestration of water hardness ions by detergent builders. Sodium polyacrylate Mw = 170,000, STPP (sodium tripolyphosphate), NTA (nitrilotriacetic acid), EDTA (ethylenediamine tetraacetic acid), sodium citrate, CMOS (sodium carboxymethoxysucci-nate), sodium carbonate, zeolite A. (Reproduced from Nagarajan, M.K., J. Am. Oil Chem. Soc., 62, 949, 1985. With permission.)... 

Ammonium chloride Ammonium sulfate Barium chloride Calcium chloride Cesium chloride Citric acid Copper sulfate Disodium ethylenediamine tetraacetate (EDTA sodium) Ethanol Ethylene glycol Ferric chloride Formic acid D-Fructose D-Glucose Glycerol... 

---