CAS No.: 23783-26-8 EINECS No.: 405-710-8
Molecular Formula: C2H5O6P Molecular Weight: 156
RIDADR: UN 3265 8/PG III
HPA has good chemical stability, hard to be hydrolyzed, and hard to be damaged by acid or alkali, safe and reliable to use, non-toxic and pollution-free. HPA can improve the solubility of zinc, with strong inhibition, HPA has better inhibition performance than HEDP, EDTMP. HPA is mainly used as the cathodic corrosion inhibitor for metals, but also widely used to realize corrosion inhibition and scale inhibition in circulating cooling water system of steel, petrochemical, electric power, pharmaceutical and other industries. HPA is specially suitable for low hardness and easy-corrosive water quality.
Dark umber liquid
Solid content %
Total phosphonic acid(as PO43-)%
Phosphoric acid (as PO43- )%
Density (20℃) g/cm3
pH(1% water solution)
The organic corrosion inhibitors of which HPA combines with low molecular weight polymer have excellent performance. When built with zinc salt, the effect is even better.
Package and Storage:
Normally in 200L HDPE drum, 1000L IBC, or customers’ requirement.
Storage for ten months in shady room and dry place.
Avoid contact with eye and skin, once contacted, flush with water.