HPAA is chemically stable, hard to be hydrolyzed, hard to be destroyed by acid or alkali, safety in use, no toxicity.

HPAA can improve zinc solubility. Its corrosion inhibition ability is5-8 times better than that of HEDP and EDTMP. When built with low molecular  polymers,  its corrosion inhibition effect is even better.

Specification:

 

items	index
Appearance	Dark umber transparent viscous liquid
Solid content %	47.0-50.0
Phosphorous acid as PO3%	4.0max
Density (20 centigrade) g/cm3	1.30min
pH (1% solution)	1.0-3.0

HPAA