Used primarily as a complexometric standard in analytical chemistry to determine the concentration of metal ions in solutions. It effectively chelates metal ions, making it valuable in titrations for accurate measurement of calcium, magnesium, and other metals. In water treatment, it helps in controlling metal ion contamination by sequestering heavy metals. It is also employed in industrial cleaning processes to remove scale and deposits caused by metal ions. In the food industry, it acts as a preservative by binding metal ions that can catalyze oxidation and spoilage. In the cosmetics industry, it serves as a chelating agent to stabilize formulations, soften water, and reduce metal ion concentrations that may cause skin irritation. Additionally, it is used in medical applications, such as in chelation therapy to treat heavy metal poisoning.