... 206.021. Product Property HEDP is an organophosphoric acid corrosion inhibitor. It can chelate with Fe, Cu, and Zn ions to form ... boilers in fields such as electric power, chemical industry, metallurgy, fertilizer, etc. In light woven industry, HEDP is used as detergent ... 1000-2000mg/L as detergent. Usually, HEDP is used together with polycarboxylic acid. 4. Package and Storage It is usually packed in ...