CAS No 23783-26-8 Molecular Formula: C2H5O6P Molecular weight: 156
Structural Formula:

Properties:
HPAA has good chemical stabilit, 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
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Index
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Appearance
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Dark umber transparent viscous liquid
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Solid content %
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47.0-50.0
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Phosphorous acid (as PO33-) %
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4.0 max
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Density (20℃) g/cm3
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1.30 min
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pH (1% solution)
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1.0-3.0
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Usage:
HPAA is mainly used as cathode corrosion inhibitor for metals, widely used in cooling water systems of steel & iron, petrochemical, power plant and medical industries. When built with zinc salts, the effect will be much better.
Package and Storage:
Normally 250kg net in 200L Drum, IBC, or as required. Storage for one year in shady room and dry places.
Synonyms: HPA, HPAA
Hydroxy-phosphono-acetic acid;
2-Hydroxy-2-phosphono-acetic acid;
2-hydroxy-2-phosphonoacetic acid;
2-hydroxy-2-phosphono-ethanoic acid;
Acetic acid, hydroxyphosphono-;
alpha.-Hydroxyl phosphonoacetic acid;
alpha.-Hydroxyphosphonoacetic acid