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Potassium Salt of HexamethyleneDiamine TetramethylenePhosphonic Acid (HMDTMPA K6 )


HMDTMPA·K6 is soluble in water, it is a good scale inhibitor for calcium sulfate, suitable for use in the situation of high pH value and high alkaline. HMDTMPA·K6 can be used for water treatment in boiler and RO membrane treatment.

CAS No.: 38820-59-6 (X-6) 53473-28-2 (6-K)

Molecular Formula: C10H22N2O12P4K6

Molecular Weight: 721

Structural Formula:



AppearanceColorless to yellowish transparent liquid
Active component (as acid), %21.2-24.6
Active component (as salt), %31.0-36.0
Chloride (as Cl), %4.0 Max.
Total phosphoric acid (PO43-), %16.8 Min.
Phosphorous acid (as PO33-), %2.0 Max.
pH (1% water solution)6.0-8.0
Density (20°C), g/cm31.21-1.31
Fe, mg/L35 Max.

Package and Storage:

200L plastic drum, IBC (1000L), as customers’ requirement.

Storage for ten months in a shady room and dry place.