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Description
TCI E0089 Ethylenediaminetetraacetic Acid Disodium Cobalt Salt is a cobalt chelate complex in which the EDTA ligand surrounds the metal centre, accompanied by two sodium ions acting as balancing cations. The product is classified as a non-heterocyclic building block and serves as a ready-to-use source of chelated cobalt for laboratory work. Because a hexadentate ligand wraps around the cobalt centre, the behaviour of this metal ion becomes far more controlled than that of simple cobalt salts, allowing researchers to introduce cobalt into aqueous solution systems without the hydrolysis or hydroxide precipitation that so often disrupts experiments.
The properties that make this compound the preferred choice are the high stability of the complex together with its good solubility in water. Cobalt, as a transition metal, forms strong bonds with EDTA, and the resulting complex has a defined geometry with a one-to-one metal-to-ligand ratio. The disodium salt form dissolves without requiring any addition of base, so working solutions can be prepared quickly. The cobalt EDTA complex also shows characteristic colour absorption in the visible region, which is an advantage in its own right because complex formation and changes in the coordination environment can be followed directly.
In Indonesian laboratories, this material is typically used wherever a stable, water-soluble cobalt source is needed rather than a simple cobalt salt. It fits routine solution preparation on the bench, where the disodium form dissolves directly and gives a reproducible starting point for further work. Research and teaching laboratories value the predictable one-to-one stoichiometry and the visible colour of the complex, which together make handling and monitoring straightforward under ordinary laboratory conditions.
Laboratory Applications
Chelated cobalt source for aqueous systems: the hexadentate EDTA ligand holds cobalt in solution, preventing the hydrolysis and hydroxide precipitation that commonly interfere when simple cobalt salts are used.
Coordination chemistry study material: the complex has a defined geometry with a one-to-one metal-to-ligand ratio, giving researchers a well-characterised starting point for investigating metal-ligand bonding behaviour.
Non-heterocyclic building block in synthetic work: classified within this category, it supplies cobalt in an already chelated form to synthetic schemes that require a controlled transition metal input.
Visible-region spectroscopic work: the cobalt EDTA complex shows characteristic colour absorption, so complex formation and changes in the coordination environment can be followed directly without additional indicators.
Rapid working-solution preparation: because the disodium salt dissolves in water without any addition of base, solutions can be made up quickly and consistently for day-to-day bench requirements.
Specifications
Brand: TCI
CAS number: 15137-09-4
Category: Chemistry > Building Blocks > Non-Heterocyclic Building Blocks
Chemical form: disodium salt of the cobalt EDTA chelate complex, metal-to-ligand ratio 1:1
Solubility: soluble in water without addition of base
Pack sizes and storage: available in standard TCI catalogue pack sizes; store in a closed container under the conditions stated on the product label
Handling and Storage
Store the material in its original tightly closed container, kept in a cool, dry place away from moisture, direct sunlight, and sources of heat. Glass or chemically compatible plastic containers with well-sealing caps are suitable, and containers should be reclosed promptly after each use to limit exposure to atmospheric humidity. Handle the solid in a well-ventilated area or fume hood, using a laboratory coat, safety glasses, and gloves, and avoid generating or inhaling dust. Use clean, dry spatulas when weighing to prevent contamination of the stock, label all prepared working solutions clearly, and follow institutional procedures for the disposal of metal-containing waste. Always consult the manufacturer's safety data sheet before use.
