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Description
TCI E0093 Ethylenediaminetetraacetic Acid Lead(II) Disodium Salt is a chelate complex of lead(II) bound to an EDTA ligand, supplied with two sodium ions serving as charge-balancing counterions. The material is classified within the non-heterocyclic building blocks group and delivers lead in a form that is already firmly held by a hexadentate ligand. Its primary function in the laboratory is to provide a fully preformed lead–EDTA complex of defined stoichiometry, so that researchers do not need to combine a lead salt with the ligand themselves and instead obtain a far more controlled system to study.
The property that makes this compound useful is the exceptionally high stability of its complex. Lead(II) is among the cations that bind most strongly to EDTA, so the complex survives well in solution and suppresses the concentration of free lead ions to very low levels. The disodium salt form provides adequate solubility in water without requiring the addition of base, and the solid is easy to weigh out accurately. This certainty of composition combined with the strength of the metal–ligand bond is precisely why the compound is frequently adopted as a reference system when researchers compare the binding strength of different metals.
In Indonesian laboratory practice, the material is most often encountered where a defined metal–chelate species is needed rather than a metal salt alone. University research groups, analytical service laboratories and environmental testing units use it when work on complexation behaviour requires a starting point whose composition is not in question. Because the complex is preformed and the solid dissolves in water directly, it fits routine bench workflows without special preparation steps.
Laboratory Applications
Complexation and stability studies: the preformed lead–EDTA complex has a fixed stoichiometry, removing the uncertainty that arises when a metal salt and ligand are mixed in situ during an experiment.
Comparative metal-binding investigations: because lead(II) binds EDTA very strongly, this compound serves as a well-defined reference point against which the binding strength of other metal ions can be assessed.
Synthetic building block applications: classified as a non-heterocyclic building block, it supplies lead in an already chelated form for preparative chemistry where a controlled metal source is required.
Solution chemistry work requiring low free lead: the high complex stability keeps the concentration of uncomplexed lead ions extremely low, which is valuable when free metal ion activity must be minimised.
Aqueous method development: the disodium salt dissolves in water without any base addition, so solutions can be prepared straightforwardly for method testing and calibration of complexometric procedures.
Specifications
Brand: TCI (Tokyo Chemical Industry)
CAS number: 22904-40-1
Catalogue number: E0093
Category: Chemistry > Building Blocks > Non-Heterocyclic Building Blocks
Pack sizes: available in TCI standard research-scale packaging; please confirm the currently offered size when ordering
Storage: keep in the tightly closed original container in a cool, dry place away from moisture
Handling and Storage
Store the product in its original tightly closed container in a cool, dry and well-ventilated area, protected from moisture and away from incompatible materials. Amber glass or the manufacturer's supplied container is suitable; transfer only with clean, dry spatulas to avoid contamination of the bulk solid. As this is a lead-containing compound, handle it as a heavy-metal reagent: work in a fume hood or well-ventilated space, wear a laboratory coat, safety glasses and chemically resistant gloves, and avoid generating or inhaling dust. Wash hands thoroughly after handling, keep the material away from food and drink, and collect all residues and rinse solutions as heavy-metal chemical waste for disposal according to institutional procedures. Always consult the manufacturer's Safety Data Sheet before use.
