Organic Phosphonic Acid

2-Hydroxyphosphonocarboxylic Acid (HPAA)

CAS NO.: 23783-26-8           EINECS: 405-710-8           Alias: HPA

Structural Formula:                                                                                                 



Properties:                   

HPAA has good chemical stability, hard to be hydrolyzed, hard to be destroyed by acid or alkali, safe and reliable in use, no toxicity, no pollution. HPAA can improve zinc solubility, with strong corrosion ability. Its corrosion inhibition ability is 5 to 8 times higher than that of HEDP or EDTMPS. When built with low molecular polymers, its corrosion inhibition effect is even better.

Specification:

items	index
Appearance	Dark umber transparent viscous liquid
Solid content %	50  min
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 for metals, in cooling water systems of steel & iron, petrochemcal, power plant and medical industries. When built with zinc salt, the effect is even better.

Packing and Storage:

Normally 250kg net in drum, IBC, or per customers. Storage for one year in room shady and dry places.

Update : 2015/2/2 10:30:12 Hits : 2940