2-Hydroxyphosphonocarboxylic Acid
(HPAA)

【CAS】23783-26-8

Molecular Formula:  C2H5O6P                  Molecular weight: 156


Properties::
This product is chemically stable, difficult to be hydrolyzed, hard to be destroyed by acid or alkali, safety in use, no toxicity, no pollution. It can improve the solubility of zinc ion, its corrosion inhibition property is 5-8 times better than that of HEDP and EDTMP. When built with polymers of low molecular weight, its corrosion inhibition effect is much better.

Specification
:Appearance Dark umber transparent viscous liquid
Solid content %  47.0-50.0
Phosphorous acid（as PO33-）% 4.0 max
Density （20℃）g/cm3 1.30 min
pH（1％ solution） 1.0-3.0

Usage:
HPAA is mainly used as cathode corrosion inhibitor, and is widely used in oilfield refill water system in fields such as steel & iron, petrochemcal, power plant and medical industries. When built with zinc salt, it is an excellent corrosion inhibitor. It is especially suitable for low hardness, easy corrosive water system in south China.