CAS3794-83-0
FormulaC2H4O7P2Na4
SynonymHEDPโขNa4, Phosphonic acid, P,P'-(1-hydroxyethylidene)bis-, sodium salt (1:4), Tetrasodium(1-hydroxyethylidene)bisphosphonate
Active Component (HEDP)>= 56.0%
Active Component (HEDP Na4)>= 79.9%
Phosphoric Acid52.0 - 54.0%
Fe<= 35.0 ppm
pH11.0 - 12.0 (1% solution)
AppearanceWhite Powder
Loss on Drying<= 15 % (20C)
Melting Point-5 c
Molecular weight293.96
Specific gravity1.30-1.35