HEDP•Na Synonyms: sodium 1-hydroxyethylidene diphosphonate;1-Hydroxyethanediphosphonic acid, sodium salt;Hydroxyethylidene diphosphonic acid, sodium salt;(1-Hydroxyethyliden)bisphosphonsure, Natriumsalz;1-Hydroxyethane-1,1-diphosphonic acid sodium salt;(1-hydroxyethylidene)bisphosphonic acid, sodium salt;Phosphonic acid, (1-hydroxyethylidene)bis-, sodium salt;Sodium salt of (1-hydroxyethylidene)bis[phosphonic acid];(1-Hydroxyethylidene)bisphosphonic acid/sodium,(1:x) salt;MONO-SODIUM SALT OF 1-HYDROXY ETHYLIDENE-1,1-DIPHOSPHONIC ACID CAS No. 29329-71-3