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Diphosphonic Acid (HEDP•K2)

CAS No.  67953-76-8

Molecular Formula: C2H6O7P2K2

Structural Formula:


HEDP•K2 is the potassium salt of HEDP, HEDP•K2 has better dissolution ability than that of sodium salt under neutral condition. HEDP•K2 is a good scale inhibitor for calcium carbonate, it can be used in metal corrosion inhibitor, antifouling agent of swimming pool, metal cleaning, volume cleaning, iron dust controlling, metal pretreatment, low pressure boiler water treatment and circulating water treatment, etc. 


Items Index
Appearance Colorless to yellowish  transparent liquid
Active content (HEDP)% 26.0-30.0
Total phosphoric acid (as PO43-) % 24.7-26.7
Fe, mg/L 20.0 max
Density (20℃)g/cm3 1.30-1.40
PH (1% water solution) 6.0-8.0

Package and Storage:

Liquid: 200L plastic drum, IBC(1000L), customers' requirement.

Solid: 25kg/bag, customers' requirement. Storage for ten months in shady room and dry place.

Safety Protection:

Weak acidity, Avoid contact with eye and skin, once contacted, flush with water. 


Tetrasodium (1-hydroxyethylidene)bisphosphonate