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
Code Product name Unit size
E005 Metal Chelates
EDTA-OH
5 g
25 g
E008 Metal Chelates
Ca(II)-EDTA
50 g
E010 Metal Chelates
Cu(II)-EDTA
10 g
E011 Metal Chelates
Fe(III)-EDTA
50 g
500 g
E013 Metal Chelates
Mg(II)-EDTA
25 g
E014 Metal Chelates
Mn(II)-EDTA
10 g
E017 Metal Chelates
Zn(II)-EDTA
25 g
500 g
G002 Metal Chelates
GEDTA(EGTA)
5 g
25 g
100 g
H001 Metal Chelates
4H(EDTA・free acid)
50 g
500 g
K001 Metal Chelates
2K(EDTA・2K)
50 g
500 g
K002 Metal Chelates
3K(EDTA・3K)
50 g
500 g
N001 Metal Chelates
2NA(EDTA・2Na)
50 g
500 g
5 Kg
N002 Metal Chelates
3NA(EDTA・3Na)
50 g
500 g
N003 Metal Chelates
4NA(EDTA・4Na)
50 g
500 g
5 kg
N008 Metal Chelates
2NH4(EDTA・2NH4)
50 g
500 g
Other Chelator
Code Product name Unit size
B019 Metal Chelates
BAPTA
100 mg
500 mg
C018 Metal Chelates
CyDTA
5 g
25 g
D022 Metal Chelates
DTPA
5 g
25 g
GB04 Good Buffer
Bicine
25 g
100 g
H006 Metal Chelates
HIDA
5 g
I001 Metal Chelates
IDA
25 g
500 g
N016 Metal Chelates
NTA
25 g
500 g
N030 Metal Chelates
NTPO
5 g
T031 Metal Chelates
TTHA
5 g
T040 Intracellular Fluorescent Probes
TPEN
100 mg
Reagents for Chelator Titration
Code Product name Unit size

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