Hydrolyzed Polymaleic Anhydride

Hydrolyzed Polymaleic Anhydride

  • Hydrolyzed Polymaleic Anhydride
Packaging: 200L plastic drum,IBC(1000L),customers` requirement. storage for one year in shady room and dry place.
Place of Origin: China

Product Description

Hydrolyzed Polymaleic Anhydride  (HPMA)


CAS No. 26099-09-2                

Structural formula



HPMA is a low molecular weight polymeride, with average molecular weight 400-800. no toxicity, soluble in water, high chemical and thermal stability, decomposed temperature above 330. HPMA has obvious threshold effect under  high temperature (350) and high  pH(8.3)level, suitable to be used in alkaline water system or built with agents. It has good scale inhibition against carbonate and phosphate scales under temperature 300 with effective time as long as 100 hours. Due to its good scale inhibition and high temperature tolerance properties, HPMA 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. In addition, HPMA has good corrosion inhibition effect when used together with zinc salt. HPMA can also used as additives for cement.






Pale yellow to umber transparent liquid

Solid content %


Bromine value mg/g


Average molecular weight


Density (20)g/cm3


pH(1%water solution)




HPMA is usually used together with organic phosphonate at dosage of 1-15ppm for circulating cool water system, oilfield fill water, crude oil dewatering and low-pressure boilers. HPMA has good scale inhibition (98%) and scale stripping properties. When used together with zinc salts, it can effectively inhibit carbon steel corrosion.


Package and storage

200L plastic drum,IBC(1000L),customers` requirement. storage for one year in shady room and dry place.


Safety protection

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



HPMA;Hydrolyzed Polymaleic Anhydride;poly(maleicacid);MALEIC ACID POLYMER;maleic acid homopolymer



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