Classification
Metal Chelates
Introduction
Organic compounds that coordinate metal ions into circular structures (chelate circles) are called chelating reagents. Most chelating reagents include oxygen, nitrogen, or sulfur atoms in their molecules. Chelate structures with five or six member rings form the most stable chelate circle. In chelating reactions of typical chelating reagents, such as ethylenediamine, acetylacetone, and oxine, several molecules are coordinated with one metal ion. Ethylenediamine tetraacetic acid (EDTA), which has many coordinated atoms, forms a very stable chelate between one molecule of EDTA and metal ion. Chelating reagents are used for chelate titration, isolation, and separation of metal ions. They are also used to mask certain ions, to solubilize metals in organic solvents, and for gas chromatography of metal ions. Metal indicators are chelating reagents that can be used to colorimetrically or fluorometrically determine metal ion concentration in solutions. Acetylacetone (AA) and its analogs are used for solvent extractions of metal ions from aqueous solutions. These metal complexes are used as catalysts of polymerization, dryness, and combustion. Chelating reagents, including EDTA, EDTA analogs, metal salts, and others, are available in bulk quantities from Dojindo. The following table indicates the stability constants of chelators with various metal ions and chelate reagents.
Product
- EDTA
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Code Product name Unit size E005 Metal Chelates
EDTA-OH5 g
25 gE008 Metal Chelates
Ca(II)-EDTA50 g E010 Metal Chelates
Cu(II)-EDTA10 g E011 Metal Chelates
Fe(III)-EDTA50 g
500 gE013 Metal Chelates
Mg(II)-EDTA25 g E014 Metal Chelates
Mn(II)-EDTA10 g E017 Metal Chelates
Zn(II)-EDTA25 g
500 gG002 Metal Chelates
GEDTA(EGTA)5 g
25 g
100 gH001 Metal Chelates
4H(EDTA・free acid)50 g
500 gK001 Metal Chelates
2K(EDTA・2K)50 g
500 gK002 Metal Chelates
3K(EDTA・3K)50 g
500 gN001 Metal Chelates
2NA(EDTA・2Na)50 g
500 g
5 KgN002 Metal Chelates
3NA(EDTA・3Na)50 g
500 gN003 Metal Chelates
4NA(EDTA・4Na)50 g
500 g
5 kgN008 Metal Chelates
2NH4(EDTA・2NH4)50 g
500 g - Other Chelator
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Code Product name Unit size B019 Metal Chelates
BAPTA100 mg
500 mgC018 Metal Chelates
CyDTA5 g
25 gD022 Metal Chelates
DTPA5 g
25 gGB04 Good Buffer
Bicine25 g
100 gH006 Metal Chelates
HIDA5 g I001 Metal Chelates
IDA25 g
500 gN016 Metal Chelates
NTA25 g
500 gN030 Metal Chelates
NTPO5 g T031 Metal Chelates
TTHA5 g T040 Intracellular Fluorescent Probes
TPEN100 mg - Reagents for Chelator Titration
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Code Product name Unit size
