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HPMA, or Hydrolyzed Polymaleic Anhydride, is a highly efficient water treatment chemical known for its exceptional scale and corrosion inhibition properties, making it a reliable choice for various industrial applications requiring effective water system maintenance.
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Product Detail

CAS No. 26099-09-02

Structural Formula:


Product Grade:Industrial


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.

HPMA, or Hydrolyzed Polymaleic Anhydride, is a versatile water treatment chemical with the CAS number 26099-09-02. Derived from Polycarboxylic Acid, HPMA is widely utilized for its outstanding scale and corrosion inhibition properties. It is highly effective in preventing scale formation and reducing corrosion in water systems. With its excellent thermal stability and dispersant capabilities, HPMA ensures the efficient operation and prolonged lifespan of industrial equipment, making it an essential component in various industrial applications.

Safety Protection:

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





Pale yellow to umber transparent liquid

Solid content%

≥ 48

Bromine value(mg/g)

≤ 80.0

pH(1% solution)


Density(20℃) g/cm3

≥ 1.180


200L Drum, 1000L IBC or Bulk.Stored in cool and dry place.

Shelf Life:

1 year


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    Large:L/C at sight,T/T 30% as deposit, and 70% before delivery. We'll show you the photos of the products and packages before you pay the balance.

  • Q2: How about your delivery time?A:Generally,it will take 15 to 20 days after receiving your advance payment. The specific delivery time depends on the items and the quantity of your order.

  • Q3: Do you have any MOQ limit for order?A:Yes, Low MOQ, 10-100g for sample checking is available.

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  • Q5: Do you test all your goods before delivery?A: Yes, we have 100% test before delivery.

  • Q6: How do you make our business long-term and good relationship?A: 1. We keep good quality and competitive price to ensure our customers benefit ;
    2. We respect every customer as our friend and we sincerely do business and make friends with them, no matter where they come from.

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