Used as a chelating agent in complexometric titrations, particularly for the determination of metal ions such as calcium, magnesium, and transition metals. Its structure allows selective and stable complex formation with multivalent metal ions, making it effective in water hardness testing and in analytical chemistry where high precision is required. Also employed in the preparation of buffer solutions and reagents for spectrophotometric and electrochemical analyses. Suitable in applications requiring minimal interference from common metal contaminants due to its strong binding capacity and specificity.