Product Introduction: DTPA (Diethylenetriaminepentaacetic Acid)
1. Chemical Profile:
Name: DTPA
Diethylenetriaminepentaacetic acid
CAS： 67-43-6
White, crystalline solid with high water solubility. Its molecular structure features multiple amine and carboxylic acid groups, which act as powerful ligands for metal coordination.
2. Primary Mechanism of Action:
The core function of DTPA is chelation. It tightly binds to metal ions through multiple coordination sites, forming stable, ring-like complexes called "chelates." This process effectively deactivates the metal ions, preventing them from participating in unwanted chemical reactions such as oxidation, precipitation, or catalysis.
3. Key Properties:
High Chelating Strength: Especially effective for hard metal ions like Fe⊃3;⁺, Cu⊃2;⁺, Ca⊃2;⁺, and Mn⊃2;⁺.
Stability: Forms complexes that remain stable over a wide pH range and under challenging conditions.
Water Solubility: Ensures easy handling and application in aqueous systems.
4. Major Applications:
Detergents and Cleaners: Acts as a builder to soften water and improve cleaning efficiency by sequestering metal ions.
Personal Care Products: Used in soaps and shampoos to stabilize color and fragrance, and to protect the product from metal-catalyzed degradation.
Chemical Processing: Serves as a catalyst stabilizer and a component in plating solutions.
Nuclear Medicine: The calcium or zinc salt of DTPA is used as a pharmaceutical agent to accelerate the excretion of radioactive transuranic elements from the body.
Photography: Used in developing and bleaching solutions.