Ethylenediaminetetraacetic acid disodium salt dihydrate CAS – 105901

In this article, we’re going to take a closer look at ethylenediaminetetraacetic acid disodium salt dihydrate (CAS 6381-92-6), a versatile analytical reagent that plays a significant role in various scientific applications. As part of our exploration, we’ll delve into its properties, functions, and practical uses.

Firstly, it’s an organic compound with the chemical formula [CH2N(CH2CO2H)2]2. This white crystalline powder dissolves easily in water and is widely recognized for its ability to chelate metal ions such as iron (Fe2+/Fe3+) and calcium (Ca2+). These chelation processes often occur under neutral pH conditions, making it highly effective in stabilizing solutions against precipitation of metal oxides.

For now, let me provide a sneak peek into its applications: EDTA is extensively utilized in industries ranging from pharmaceuticals to food science, primarily for sequestering metal ions. It also finds use in environmental remediation projects where iron oxide solubility is critical. We’ll discuss these applications in greater detail later in the article.

Understanding Ethylenediaminetetraacetic Acid (EDTA)

Ethylenediaminetetraacetic acid, commonly referred to as EDTA or AEDT, is a synthetic compound renowned for its chelating capabilities. Its primary function is to bind to metal ions through the formation of stable complexes. These complexes typically adopt an octahedral geometry, ensuring strong interactions between the EDTA molecule and the metal ion.

Chelating agents work by sharing electrons with metals, enabling them to stabilize or remove unwanted ions from systems. EDTA, in particular, excels due to its unique molecular structure, which includes four carboxyl groups and two amine nitrogen atoms. Each of these functional groups can donate electron pairs, creating what chemists call "Lewis bases." This property allows EDTA to establish multiple bonds with metallic centers, forming robust complexes.

Moreover, EDTA’s disodium salt dihydrate form (CAS 6381-92-6) is particularly notable because it enhances solubility while maintaining its chelating efficiency. When dissolved, it typically ionizes, offering up to six potential binding sites for metal cations. This makes it incredibly useful across numerous fields, including medical diagnostics, cleaning products, and water treatment facilities.

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