EDTA Disodium salt extra pure

EDTA Disodium salt extra pure is a high-purity, laboratory-grade reagent used for the chelation (binding) of metal ions in analytical, biochemical, and industrial applications. It is commonly supplied as a white crystalline powder and is highly soluble in water.​

Specifications and Properties

Chemical Name: Ethylenediaminetetraacetic acid disodium salt dihydrate

Formula: C₁₀H₁₄N₂Na₂O₈·2H₂O

Purity: ≥99–99.5% (extra pure grade)​

Appearance: White, odorless crystalline powder

pH (5% solution in water): 4–5​

Solubility: 100 g/L at 20 °C in water​

Typical contaminants: Very low levels of heavy metals and insoluble matter; max 0.001% Pb, max 0.0001% As​

Melting point: ~248 °C (with decomposition)​

CAS Number: 6381-92-6​

Common Uses

Buffer and reagent preparation in molecular biology, genetics, and biochemistry for chelating metals and protecting biomolecules.​

Standard titrant in complexometric analysis for the quantitative determination of metal ions (e.g., Ca²⁺, Mg²⁺).

Water treatment, cleaning, and food preservation as a sequestering agent.​

EDTA Disodium salt extra pure is favored for critical laboratory uses due to its high purity, minimal contaminants, and strong chelating ability