Dissolvine D-50 (DTPA-Na₅, CAS 140-01-2): Enabling Sustainable Cleaning and Bleaching Processes through Advanced Metal Ion Control

As a core product of Nouryon, Diethylenetriaminepentaacetic acid pentasodium salt (CAS: 140-01-2, trade name Dissolvine D-50), with its five sodium carboxylate groups in the molecular structure, serves as a versatile solution in the field of metal ion chelation. Its applications span three main areas: household detergents, industrial cleaning, and hydrogen peroxide stabilization, addressing technical challenges in conventional processes through physicochemical interactions.

In formulations such as laundry detergents and dishwashing liquids, Dissolvine D-50 softens water by chelating calcium and magnesium ions. The mechanism involves the formation of stable water-soluble complexes between the sodium carboxylate groups and metal ions, preventing the ions from combining with surfactants to form insoluble precipitates. This process reduces the ineffective consumption of active detergent ingredients, allowing surfactants to focus more effectively on stain removal. For example, in hard water regions, the use of laundry detergents containing Dissolvine D-50 prevents soap scum deposition on fabric surfaces while minimizing skin irritation caused by detergent residues. As an alternative to traditional sodium silicate, it overcomes the low solubility of silicates at low temperatures, making it suitable for cold-wash processes.

In industrial equipment cleaning, Dissolvine D-50 offers a dual solution for calcium and magnesium deposits and metal corrosion. For boiler scale, it inhibits the formation of calcium carbonate crystal nuclei by chelating calcium ions, while simultaneously converting existing scale deposits into soluble complexes. In metal component cleaning, the nitrogen atoms in its molecular structure form five-membered chelates with iron and copper ions, suppressing metal-catalyzed oxidation reactions. Compared to EDTA, its complexes remain stable under high-temperature and high-pH conditions, making them suitable for demanding cleaning applications such as automotive engines and food processing equipment. This product can replace corrosive acid cleaners like hydrofluoric acid, reducing substrate damage to equipment.

In textile and paper bleaching processes, Dissolvine D-50 extends the effective lifespan of hydrogen peroxide by passivating transition metal ions (e.g., Fe³⁺, Cu²⁺). The mechanism involves the preferential binding of sodium carboxylate groups to catalytic metal ions, forming sterically hindered complexes that block contact between the ions and hydrogen peroxide molecules. This prevents premature decomposition of hydrogen peroxide on fiber surfaces, which can generate oxygen bubbles, and ensures more uniform penetration of the bleaching agent into the fibers. In cotton and linen bleaching, this approach reduces fiber strength loss and lowers metal ion concentrations in bleaching effluents, meeting environmental discharge standards.

The molecular design of Dissolvine D-50 enables cross-industry adaptability. In electronic component cleaning, its low-residue properties prevent metal ion-induced corrosion on circuit boards. In cosmetic formulations, its biodegradability complies with EU Ecolabel certification standards. Through continuous optimization of synthesis processes, Nouryon has ensured the product's performance stability across varying pH and temperature conditions, facilitating its expansion from traditional industrial applications to emerging fields such as new energy battery cleaning and medical device disinfection.

From molecular-level metal control to process chain efficiency enhancement, Dissolvine D-50 is redefining the application boundaries of chelating agents through its technical versatility. Its solutions do not rely on stoichiometric adjustments but adapt to diverse needs through fundamental mechanisms, offering sustainable technological options for the cleaning and bleaching industries.

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