2-Hydroxyphosphonocarboxylic Acid (HPAA)
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- 2023-11-30
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CAS No.: 23783-26-8
Molecular formula: C2H5O6P
Relative molecular mass: 156
Structural formula:
Other name: Hydroxyphosphono-acetic acid; 2-Hydroxy-2-phosphonoacetic acid; HPA; HPAA; 2-Hydroxy phosphonoacetic acid
1. Performance and usage
HPAA has good chemical stability, is not easily hydrolyzed, and is not easily destroyed by acid and alkali. It is safe and reliable to use, non-toxic and pollution-free. It can improve the solubility of zinc and has a strong corrosion inhibition effect. Its corrosion inhibition performance is higher than that of HEDP and EDTMP.
HPAA is mainly used as a cathodic corrosion inhibitor for metals. It is widely used for corrosion and scale inhibition in circulating cooling water systems in steel, petrochemical, electric power, pharmaceutical and other industries. It is suitable for use as a corrosion inhibitor for low-hardness, easily corrosive water in southern my country.
2.Technical indicators
|
Items |
Index |
|
Appearance |
Dark umber liquid |
|
Solid content, % |
≥ 50.0 |
|
Total phosphonic acid (as PO43-), % |
≥ 25.0 |
|
Phosphoric acid (as PO43-), % |
≤ 1.50 |
|
Density (20℃), g/cm3 |
≥ 1.30 |
|
pH (1% water solution) |
1.0-3.0 |
3.Using Method
Organic corrosion and scale inhibitor that composed by HPAA and low molecular weight polymer has excellent performance. And effect will be more better when combined with zinc salt.
4. Packaging and storage
Liquid: 25kg or 200kg per plastic barrel;
Store in a cool and ventilated place indoors, storage period is 1 year.
5. Safety protection
This product is acidic. Pay attention to labor protection during operation. Avoid contact with skin, eyes, etc. After contact, flush with plenty of water immediately.
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