Applications of EDTA Acid and its salts manufactured: 1. EDTA Acid (Ethylenediamine tetra acetic acid) [CAS no. 60-00-4] - Chelation agent, antioxidants, column chromatography. 2. EDTA Calcium Disodium salt (EDTA Calcium or Ethylenediamine tetra acetic acid calcium disodium salt) [CAS no. 39208-14-5] - Color retention agent in foods.