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Description
TCI D3901 Dipotassium Dihydrogen Ethylenediaminetetraacetate Dihydrate is the dipotassium salt of ethylenediaminetetraacetic acid (EDTA) in its dihydrate form, commonly referred to as K2EDTA. The compound is a classic chelating agent capable of binding divalent and trivalent metal ions to form highly stable, water-soluble complexes. In laboratory settings, EDTA and its salts are among the materials that are almost always kept on hand, because their role is so broad: from complexometric titration for water hardness determination, to metal-binding buffers in molecular biology solutions, to anticoagulant use in blood sample preparation for hematology examination.
The characteristic that makes this dipotassium salt form a frequent choice is its better solubility compared with free EDTA acid, so working solutions can be prepared quickly without requiring the addition of large amounts of base. As a hexadentate ligand, the EDTA molecule wraps around a metal ion through four carboxylate oxygen atoms and two amine nitrogen atoms, producing a cage-shaped complex with a high stability constant. In hematology use, the potassium cation also offers a practical advantage because the salt dissolves more rapidly in the sample.
In Indonesian laboratories, this material fits naturally into everyday routines across several disciplines. Analytical chemistry laboratories reach for it when running complexometric titrations, molecular biology laboratories use it to prepare metal-binding buffer solutions, and clinical laboratories rely on it during blood sample preparation for hematology work. Because a single container serves analytical, biological, and clinical workflows, it is a practical stock item for teaching laboratories, research groups, and routine testing facilities alike.
Laboratory Applications
- Complexometric titration for water hardness determination, where the high stability constant of the EDTA-metal complex gives a sharp, reproducible endpoint for divalent metal ions.
- Metal-binding buffer preparation in molecular biology, where EDTA sequesters divalent cations that would otherwise serve as cofactors for nucleases that degrade nucleic acid samples.
- Anticoagulant use in blood sample preparation for hematology examination, where the salt binds the divalent cations required for the coagulation cascade to proceed.
- General chelation and complexation work in synthetic chemistry, where the hexadentate ligand forms a cage-shaped complex around a target metal ion through six coordinating atoms.
- Rapid working-solution preparation in routine analysis, where the improved solubility of the dipotassium salt removes the need to add large quantities of base to dissolve free EDTA acid.
Specifications
- Brand: TCI
- CAS Number: 25102-12-9
- Chemical name: Dipotassium Dihydrogen Ethylenediaminetetraacetate Dihydrate (K2EDTA)
- Category: Chemistry > Synthetic Reagents > Chelation/Complexation Compounds
- Pack sizes: available in standard TCI catalog packaging; please contact us to confirm the size you require
- Storage: store in a tightly closed container under the conditions stated on the product label
Handling and Storage
Store the container tightly closed in a cool, dry place away from moisture, since the material is supplied as a dihydrate and its water content should be kept stable during storage. Use clean, dry containers made of a material compatible with chelating salts, and keep the original label intact for identification. Handle the product with standard laboratory precautions: wear a laboratory coat, gloves, and eye protection, avoid generating dust when weighing out the solid, and work in a well-ventilated area or under a fume hood. Use dedicated dry spatulas to prevent contamination of the stock, and always follow the safety data sheet supplied by the manufacturer together with your own institutional laboratory safety procedures.
