Hydroxyethyl EDTA Trisodium

The trisodium HEDTA solution content is ≥ 39.00%, a high-concentration chelating agent solution. The content index adheres to strict factory testing standards, ensuring each batch meets or exceeds requirements.

The pH value of a 1% aqueous solution of the product (25°C) is 11.0-12.0, strongly alkaline. Specific gravity (20°C) ≥ 1.27 g/ml, higher than common aqueous solutions. These alkaline properties and high density provide excellent performance in chelating metal ions.

HEDTA trisodium salt is a broad-spectrum chelating agent that effectively chelates a variety of metal ions, including: iron (Fe³⁺, Fe²⁺), calcium (Ca²⁺), magnesium (Mg²⁺), copper (Cu²⁺), zinc (Zn²⁺), and manganese (Mn²⁺). Its chelating ability for ferric ions is particularly outstanding, performing best under neutral to alkaline conditions.

Both HEDTA and EDTA are aminopolycarboxylic acid chelating agents. The main differences are: HEDTA has stronger chelating ability for ferric ions, especially under neutral to alkaline conditions; EDTA is effective over a wider pH range. The molecular structure of HEDTA contains a hydroxyethyl group, which provides better compatibility in certain application systems.

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

HEDTA (hydroxyethyl ethylenediamine triacetic acid) is a modified EDTA derivative with molecular formula C₁₀H₁₅N₂O₇·3Na and molecular weight 344.2. It contains nitrogen atoms and carboxylic acid groups that provide multiple coordination sites to form stable five- or six-membered ring complexes with metal ions. The three sodium ions are present in ionic form, giving the product good water solubility.

Under proper storage conditions (cool, dry, sealed container), HEDTA trisodium salt solution is stable and has a shelf life of over 12 months. The product is an alkaline solution, resistant to microbial growth, and has good chemical stability. Avoiding high temperatures and direct sunlight can further extend the product's shelf life.

As the product is strongly alkaline (pH 11-12), avoid direct contact with skin and eyes during use. It is recommended to wear protective gloves and goggles. The product is somewhat corrosive to metals; storage and conveying equipment should be made of stainless steel or plastic. Refer to the product MSDS for detailed safety information.

Yes, pH value has a significant effect on the chelating performance of HEDTA trisodium salt. The chelating effect is optimal under neutral and alkaline conditions (pH 6-12). As pH decreases, protonation of the carboxylic acid groups reduces their coordination ability. Therefore, in acidic systems, dosage adjustment or selection of alternative chelating agents may be necessary.