... :HEDP•Na is an organophosphonic acid corrosion inhibitor, it can chelate with Fe, Cu, and Zn ions. HEDP•Na can ... . Specification:itemsindexAppearanceColorless or light yellow transparent liquidActive content (HEDP)%19.0-21.0Fe,mg/L20 maxPH (1% water solution)2.3 ... inhibitor in fields such as power plant, chemical industry, metallurgy, fertilizer, etc.. In light woven industry, this product is used as ...