(1-Hydroxyethylidene)diphosphonic acid, trisodium salt 2666-14-0 DIPHOSPHONIC ACID, (1-HYDROXYETHYLIDENE)-, TRISODIUM SALT EINECS 220-200-3 Ethane-1-hydroxy-1,1-diphosphonic acid, trisodium salt Phosphonic acid, (1-hydroxyethylidene)bis-, trisodium salt Trisodium etidronate Trisodium hydrogen (1-hydroxyethylidene)bisphosphonate