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Polymaleic Acid (PMA)

Molecular Weight:  About 1000

Molecular Formula & Molecular Structure:



PMA is a solvent-based maleic acid hopolymer, with obvious threshold inhibition and crystal modification, and average molecular weight around 1000. It is the superior calcium carbonate inhibitor in high hardness, high alkalinity, and high temperature severe water conditions and a multifunctional formulation support agent in industrial water systems and other related applications.

PMA is widely used in desalination plant of flash vaporization equipment, low pressure boiler, steam locomotive, crude oil evaporation, petroleum pipeline, and industrial circulating cool water systems.


Items Index
Appearance Amber liquid
Solid content % 48-52
pH (as it) 2.0 max
Viscosity at 25°C (cps) 12.0-30.0
Density  (20 ℃ , g/cm3 ) 1.16-1.22


PMA has better performance when combined with phosphonates than when phosphonates used alone.PMA is compatible with quaternary ammonium compounds, while not affected by chlorine or other oxidizing biocides under normal use conditions.

Package and Storage:

200L plastic drum,IBC(1000L),customers’ requirement. storage for ten months in shady room and dry place.

Safety Protection:

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