EDTA Acid salt extra pure

EDTA acid salt extra pure, also known simply as EDTA (ethylenediaminetetraacetic acid), is a high-purity laboratory reagent used for its powerful chelating ability with metal ions in a variety of analytical and industrial applications.​

Specifications and Properties

Chemical Name: Ethylenediaminetetraacetic acid (EDTA)

Formula: C₁₀H₁₆N₂O₈

CAS Number: 60-00-4

Appearance: White, odorless crystalline powder​

Purity: ≥99% (extra pure grade)​

Solubility: Slightly soluble in cold water, more soluble in hot water and alkaline solutions (like NaOH, NH₄OH)​

pH (5% solution): Typically 4–6​

Chelation value: ≥339 mg CaCO₃/g​

Heavy metals: Pb ≤ 0.001%, Fe ≤ 0.001%​

Common Uses

Chelating agent for removing heavy metals and controlling metal ion concentrations in analytical chemistry, molecular biology, water treatment, and pharmaceutical formulations.​

Binds divalent and trivalent cations (e.g., Ca²⁺, Fe³⁺, Mg²⁺) to form stable, water-soluble complexes, even at near-neutral pH.​

Used in preparing metal-free buffers for enzyme studies, protein, and nucleic acid work.​

Effective in scale removal, cleaning, and preservative systems.​

EDTA acid salt extra pure is preferred when the highest levels of purity and the strongest chelating action are required, providing reliable results in sensitive laboratory, industrial, and clinical workflows.