Hydrolyzed Polymaleic Anhydride (HPMA)

Aliases: Polymaleic Anhydride, Polymaleic Acid, Poly-cis-butenedioic Acid
CAS No.: 26099-09-2
Structural Formula:

Performance and Applications

HPMA generally has a relative molecular weight of 400-800; it is non-toxic, easily soluble in water, with high chemical stability and thermal stability, and its decomposition temperature is above 330℃; HPMA is suitable for alkaline environment.

Due to its excellent scale inhibition performance and high temperature resistance, HPMA is widely used in flash evaporation devices for seawater desalination, low-pressure boilers and industrial circulating cooling water. It also has a certain corrosion inhibition effect, and the corrosion inhibition effect is better when compounded with zinc salts. It can also be used as a cement admixture and a saline-alkali soil improver.

Technical Specifications

Usage Method

When HPMA is used alone, the general concentration is 1~15mg/L. It is often compounded with organophosphonates for circulating cooling water treatment and internal treatment of high-pressure boilers, with good effect of inhibiting scale formation and stripping old scale, and the scale inhibition rate can reach 98%. After EDTMPS is compounded with HPMA in a ratio of 1:3, it can be used for internal water treatment of low-pressure boilers; when compounded with zinc salts, it can effectively prevent corrosion of carbon steel.

Packaging and Storage

HPMA is packed in plastic drums, Standard capacities: 25kg, 250kg, 1250kg (IBC tank).Note: Packaging weight can be adjusted according to customer requirements. The shelf life is twelve months.

Safety Protection

HPMA is acidic. Pay attention to labor protection during operation. Avoid contact with skin, eyes, etc. In case of contact, rinse immediately with plenty of clean water.