EDTA (Ethylenediaminetetraacetic acid) is a widely used chelating agent in molecular biology and protein biochemistry, where it functions by binding divalent metal ions such as calcium and magnesium. This 0.5 M solution at pH 7.4 is commonly incorporated into cell lysis buffers and biological sample preparation workflows. EDTA is also extensively used in blood collection applications, where sequestration of calcium ions inhibits coagulation and helps maintain cellular integrity. Proper pH adjustment is required to ensure EDTA solubility in aqueous solutions.