Tetra sodium of 1-Hydroxy Ethylidene-1,1-Diphosphonic Acid
CAS No.: 3794-83-0
Molecular Formula: C2H4O7P2Na4 Molecular weight: 294
HEDP•Na4 is an good scale inhibitor for calcium carbonate, it can be used in low pressure boiler water system, circulating water system, industrial and municipal cleaning water system and swimming pool.
HEDP•Na4 is widely used in circulating cool water system, medium and low pressure boiler, oil field water pipelines as scale and corrosion inhibitor.
Colorless to light yellow transparent liquid
Active component (HEDP) %
Active component )HEDP•Na4) %
Total phosphoric acid (as PO43-) %
Dry weight loss, %
Density (20℃) g/cm3
11.0-12.0 (1% water solution)
10.0-12.0 (as it)
Packing and Storage:
For liquid: Normally 250kg net in drum, IBC, or per customers. For solid: inner liner polyethylene (PE) bag, outer plastic woven bag, or confirmed by clients. Storage for ten months in shady room and dry places.
Weak acidity, Avoid contact with eye and skin, once contacted, flush with water immediately.