CAS No.: 23783-26-8
Alias: Phosphono hydroxyacetic acid, Hydroxyphosphonoacetic acid, Hydroxyphosphonoacetic acid, HPA
Molecular formula: C2H5O6P
Relative molecular mass: 156
Structural formula: I. Properties and Uses:
HPAA has good chemical stability, is not easily hydrolyzed, not easily destroyed by acids and alkalis, safe and reliable to use, non-toxic and pollution-free. HPAA can increase the solubility of zinc and has a strong corrosion inhibition effect. The corrosion inhibition performance of HPAA is higher than that of HEDP and EDTMP. HPAA is mainly used as a cathodic corrosion inhibitor for metals, widely used in the corrosion and scale inhibition of circulating cooling water systems in industries such as steel, petrochemicals, power, and pharmaceuticals. It is suitable as a corrosion inhibitor for low-hardness, easily corrosive water quality in southern China. II. Technical Indicators Comply with HG/T 3926-2007 Item | Indicator | Appearance | Dark brown liquid | Solid content % ≥ | 50.0 | Organic phosphorus (as PO43-) % ≥ | 25.0 | Phosphoric acid (as PO43-) % ≤ | 1.5 | Phosphorous acid (as PO33-) % ≤ | 3.0 | Density (20°C) g/cm3 ≥ | 1.30 | pH value (10g/L aqueous solution) ≤ | 3.0 |
III. Usage Method
HPAA, when combined with low molecular weight polymers, forms an excellent organic corrosion and scale inhibitor. The combination of HPAA with zinc salts yields even better results. IV. Packaging and Storage
HPAA is packaged in plastic barrels, each containing 30kg. Store in a cool, indoor place. The shelf life is twelve months. V. Safety Protection
HPAA is an acidic liquid. Pay attention to labor protection during operation. Avoid contact with skin, eyes, etc. In case of contact, rinse thoroughly with plenty of water. |
