Ethylenediaminetetraacetic Acid Cadmium Disodium Salt Hydrate is a stable chelate complex of EDTA with cadmium ions, primarily used as an analytical standard in complexometric titrations and for calibrating instruments in cadmium detection. It is essential in environmental monitoring, water treatment analysis, and industrial quality control to accurately measure cadmium concentrations and assess metal contamination. In research, it supports studies on cadmium bioavailability, toxicity, and chelation mechanisms in biological systems, including medical applications for heavy metal poisoning treatments. Its role in stabilizing cadmium makes it valuable in formulating reference materials for spectroscopy and chromatography techniques.