HEDTA trisodium salt solution

The content of trisodium hydroxyethylethylenediaminetriacetate in this product is ≥39.00%, representing a high-concentration chelating agent solution. The content indicator is controlled by strict factory testing standards, ensuring each batch meets or exceeds specified requirements.

pH of a 1% aqueous solution of the product (25°C) is 11.0-12.0, indicating strong alkalinity. Specific gravity (20°C) ≥1.27 g/mL, which is higher than that of ordinary aqueous solutions. These alkaline properties and high density ensure excellent performance in chelating metal ions.

HEDTA trisodium salt is a broad-spectrum chelating agent that effectively binds various metal ions, including iron (Fe³⁺, Fe²⁺), calcium (Ca²⁺), magnesium (Mg²⁺), copper (Cu²⁺), zinc (Zn²⁺), manganese (Mn²⁺), and others. Its ability to chelate ferric ions is particularly high, with maximum efficiency under neutral and alkaline conditions.

HEDTA and EDTA belong to the class of aminopolycarboxylic chelating agents. The main difference is that HEDTA has a higher chelating capacity for ferric ions, especially under neutral and alkaline conditions, whereas EDTA is effective over a wider pH range. The presence of a hydroxyethyl group in the molecular structure of HEDTA provides better compatibility in some application systems.

This product is a clear liquid ranging from light yellow to yellow with no odor. The liquid form is convenient for direct use or dilution, requiring no heating for dissolution. As a sodium salt, the product has good water solubility and is miscible with water in any proportion.

HEDTA (hydroxyethylethylenediaminetriacetic acid) is a modified derivative of ethylenediaminetetraacetic acid with formula C₁₀H₁₅N₂O₇·3Na and molecular weight 344.2. The structure contains nitrogen atoms and carboxyl groups that provide multiple coordination sites for forming stable five- or six-membered chelate complexes with metal ions. Three sodium ions are present via ionic bonds, giving the product good water solubility.

Under proper storage conditions (cool, dry place, sealed container), HEDTA trisodium salt solution is stable, with a shelf life of more than 12 months. The product is an alkaline solution, resistant to microbial attack, with good chemical stability. Avoiding high temperatures and direct sunlight helps to further extend the shelf life.

Due to the highly alkaline nature of the product (pH 11-12), direct contact with skin and eyes should be avoided; protective gloves and goggles are recommended. The product has certain corrosive activity towards metals, therefore stainless steel or plastic should be used for storage and transport equipment. Detailed safety information is provided in the product's Material Safety Data Sheet (MSDS).

Yes, pH significantly affects the chelating efficiency of HEDTA trisodium salt. The best results are achieved under neutral and alkaline conditions (pH 6-12). Lowering pH leads to protonation of carboxyl groups, reducing their coordination ability. Therefore, when used in acidic systems, dosage adjustment or selection of a different type of chelating agent may be required.