Hydrolyzed Polymaleic Anhydride (HPMA)
CAS No.: 26099-09-2
Dequest：P9000
Structural Formula:

Product performance:
HPMA is a low molecular weight polymeride, with average molecular weight 400-800. No toxicity, easily to be dissolved in water, and has high chemical stability and thermal stability, the decomposition temperature is above 330℃. HPMA has obvious threshold effect under high temperature (<350℃) and high pH(8.3) value, suitable to be used in alkaline water system or being used together with other medicines. It has good scale inhibition against carbonate under 300℃, with effective time as long as 100 hours. HPMA can also be used as cement additives.
Specification:
Items Index
Appearance Light yellow to brownish red clear liquid
Solid content %≥ 48.0
Bromine value mg/g≤ 80.0
Average molecular weight≥ 450
PH value (1% water solution) 2.0-3.0
Density (20℃) g/cm3≥ 1.18
Range of application:
Due to its good scale inhibition and high temperature resistance 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 cooling water systemss.
Usage:
HPMA is usually used together with organic phosphonate at dosage of 1-15ppm, has good scale inhibition (98%) and scale stripping properties. When use it together with zinc salt, it can inhibit carbon steel’s corrosion effectively. Dosage should be determined by experiment in other fields.

Package and Storage:
Normally In 30kg net Plastic Drum, IBC drum can also be used as required.
Storage for ten months in room shady and dry place.