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Description
Ethylenediaminetetraacetic Acid Magnesium Disodium Salt from TCI, supplied under catalogue code E0094, is a complexed salt form of EDTA in which the chelating cavity is already occupied by a magnesium ion, with two sodium ions serving as balancing cations. Unlike free EDTA, which functions as a versatile metal-binding agent, this compound arrives as a fully pre-formed metal complex. For that reason it is used in the laboratory not to "capture" metals, but to deliver magnesium in a protected, water-soluble form that remains stable across a wide working pH range. It plays an important role in plant nutrition research, coordination chemistry, and the preparation of solutions that require reliable magnesium availability without any risk of precipitation.
The principal characteristics that lead researchers to select this material are the stability of the magnesium–EDTA complex and its good solubility in water — two properties rarely found together in simple inorganic magnesium sources. Because the magnesium ion is already coordinated by four carboxylate groups and two nitrogen atoms, it does not readily react with the phosphates, carbonates, or hydroxides commonly present in biological media and nutrient solutions. This pre-coordinated arrangement keeps the metal in solution where a plain magnesium salt would form insoluble deposits, and it makes the complex a practical reference point in work on chelate behaviour and metal-ligand interactions.
In Indonesian laboratories, this reagent is typically encountered wherever magnesium must be introduced into an aqueous system in a controlled and dependable manner. Agricultural and plant physiology groups use it in nutrient formulation studies, while coordination chemistry and analytical laboratories rely on it as a defined, ready-made metal complex. Its usefulness is greatest in solution preparation tasks where the working pH cannot be tightly controlled and where precipitation of the magnesium source would otherwise compromise the experiment.
Laboratory Applications
- Plant nutrition research — supplies magnesium in a chelated, plant-compatible form that stays dissolved in nutrient media containing phosphate and carbonate, so the intended dose actually reaches the system under study.
- Coordination chemistry studies — serves as a fully formed, well-defined magnesium–EDTA complex, allowing researchers to examine metal-ligand coordination behaviour without first having to prepare and verify the complex themselves.
- Nutrient solution preparation — delivers dependable magnesium availability across a broad pH range, removing the precipitation problems that arise when simple inorganic magnesium salts are used in mixed-salt formulations.
- Chelate behaviour reference work — provides a practical comparison point for evaluating how chelated metals differ from free metal ions in stability, solubility, and reactivity within aqueous laboratory systems.
- Aqueous solution formulation — offers a water-soluble magnesium source suitable for preparing stock and working solutions where clarity, stability on standing, and freedom from sediment are required.
Specifications
- Brand: TCI (Tokyo Chemical Industry), catalogue code E0094
- CAS number: 14402-88-1
- Category: Chemistry > Synthetic Reagents > Chelation/Complexation Compounds
- Chemical form: magnesium disodium complex salt of ethylenediaminetetraacetic acid
- Pack sizes: available in standard TCI research-scale packaging; please confirm the currently offered sizes when ordering
- Storage: keep in the tightly closed original container, protected from moisture
Handling and Storage
Store the material in its original tightly closed container in a cool, dry, well-ventilated area, away from moisture, since salts of this type readily take up water from humid air. Amber or opaque plastic and glass containers with secure closures are suitable for decanted portions, and each should be clearly labelled with the compound name, catalogue code, and CAS number. Handle the powder in a manner that limits dust formation, using a laboratory coat, safety glasses, and gloves, and weigh it in a ventilated area or fume hood. Return the container promptly after use, and always consult the manufacturer's safety data sheet before first handling.
