Ethylenediaminediacetic acid

During the early sixties Thompson and Loraas (77) reported the formation of mixed complexes of reasonable stability (log K 3.0—5.3) between lanthanide—HEDTA and ligands such as EDDA (N,N -ethylenediaminediacetic acid), HIMDA (N-hydroxyethyliminodiacetic acid) and IMDA (iminodiacetic acid). This observation together with the remarkably large formation constants (72) for the bis-EDDA complexes [log A2 =4.73 (La) 8.48 (Lu)] suggested a coordination number larger than six for the tripositive lanthanide ions in aqueous solution, in view of the fact that mixed chelates of the t5q>e M (HEDTA) (IMDA) axe not formed when M =Co(II), Ni(II) or Cd(II). 

The stability constants for N/-(2-hydroxyethyl)ethylenediaminteri-acetic acid (HEDTA) [453], a closely related ligand to EDTA, and those of N, N -ethylenediaminediacetic acid (EDDA) [454] are compared in Table 34. A severe gadolinium break is observed in the case of both EDDA and HEDTA. 

H4edta, N,N -ethylenediaminetetraacetic acid H2edda, N,N -ethylenediaminediacetic acid H2mal, maleic acid H2ox, oxalic acid. 

N,N -ETHYLENEDIAMINEDIACETIC ACID TETR. SODIUM SALT see EIVOOO ETHYLENEDIAMINE HYDROCHLORIDE see EIWOOO ETHYLENEDIAXDNE (OSR. ) see EEA500 ETHYLENEDIAXONETETRAACETATE see EIXOOO... 

The vesicle-forming ethylenediaminediacetic acid derivative 10 complexes metal ions (e.g. Cu " ) from the aqueous phase. Since ftietal ions cannot generally penetrate hydrophobic vesicle membranes, literally any redox-active ions can be fixed to the inner and/or outer membrane surfaces. Cationic metallovesicles were also obtained from the double chain amphiphile 11 synthe-... 

Fig. 5-56. Separation of iminodiacetic acid, ethylenediaminetriacetic acid, and ethylenediaminediacetic acid. - Separator column Mikropak MCH-10 (Varian) eluent 0.2 g/L sodium oc-tylsulfate + 0.5 mL/L H2S04 / methanol (92 8 v/v) flow rate 1 mL/min detection UV (215 nm) injection volume 50 pL solute concentrations 500 ppm IDA, 50 ppm EDTriA, and 50 ppm EDDA.

N,N -Ethylenediaminediacetic acid tetrasodium salt. See Tetrasodium EDTA Ethylenediamine dihydriodide Synonyms EDDI Empirical C2H10I2N2 Formula (CH2NH3)2l2 Properties M.w. 315.92 Uses Iodine source for animal nutrition Manuf./Distrib. Wm. Blythe Ltd http //www.wm-biythe.co.uk... 

EDTA sodium salt EDTA tetrasodium salt N,N -1,2-Ethanediylbis (N-(carboxymethyl)) glycine tetrasodium salt Ethylenebis (iminodiacetic acid) tetrasodium salt N,N -Ethylenediaminediacetic acid tetrasodium salt... 

Iminodiacetic acid Iminodipropionic acid N-methyliminodiacetic acid N,N -Ethylenediaminediacetic acid Ethylenediaminetetraacetic acid... 

The degradation products from EDTA such as ethylenediaminetriacetic acid and ethylenediaminediacetic acid cannot be determined with this method, because they do not react with ferric nitrate. The analytical procedure for the determination of these compounds is discussed in Section 6.6. 

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