China's 2018 copper demand to climb 3.6% to 11.15 mil mt. China's 2018 copper demand to climb 3.6% to 11.15 mil mt. irohedp.com HEDP, Hydroxyethylidene Diphosphonic Acid HEDP ( Hydroxyethylidene Diphosphonic Acid ) is a kind of organic phosphonic acid. As an experienced supplier, Shandong IRO Water Treatment always supply high