2-Hydroxyphosphonocarboxylic Acid (HPAA)
CAS No.:: 23783-26-8   
Molecular Formula: C2H5O6P                  
Molecular weight: 156
Structural Formula:

Product performance:
HPAA has good chemical stability, and is not easily to be hydrolyzed, and hard to be destroyed by acid or alkali. It can use safety and reliable, no toxicity, no pollution. It can enhance the zinc’s solubility, and have better corrosion inhibitor, meanwhile, the corrosion inhibitor is 5-8 times than that of HEDP、EDTMP. When it mixes together with low molecular polymers, the corrosion inhibition effect will be much better. HPAA has better high temperature resistance, the water dissolve rate is only 8% under 200℃.
Specification:
Items Index
Appearance Colorless or light yellow clear liquid
Solid content %≥ 47.0-50.0
Phosphorous acid(as PO33-)%≤ 4.0 max
Density (20℃) g/cm3≥ 1.30 min
PH value (1% water solution) 1.0-3.0
Range of application:
HPAA is mainly used as metal cathodic corrosion inhibitor, widely used in the field of steel、petrifaction、electric power、medicine and so on. It can be used as corrosion inhibitor in the south part of China which the water is low rigidity and easily to be corroded.
Usage:
The dosage of HPAA is 5-25mg/L, and it is used together with organic phosphonic acid and copolymer and other chemicals, the effect will be much better if use it together with zinc salt.
Package and Storage:
Normally In 30kg net Plastic Drum, IBC drum can also be used as required.
Storage for twelve months in room shady and dry pace.