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HPAA = Hydroxyphosphonocarboxylic Acid
EC / List no.: 607-269-9 / 405-710-8
CAS no.: 23783-26-8
Mol. formula: C2H5O6P
Hydroxyphosphono-Acetic Acid (HPAA) will be delivered as a 50% aqueous solution.
HPAA considered being a mild steel corrosion inhibitor and is mainly used in the water treatment industry.
HPAA shows superior performance in all organic formulations compared to commonly used Phosphonates.
In certain formulations it can replace Molybdate or its derivatives.
Uses:
HPAA (cas# 23783-26-8) is used in preparation method of salt-resistant calcium-magnesium resistant polymer colloid system and its application in oil reservoir oil displacement
Widely used in steel, petrochemical, electric power, pharmaceutical and other industries of circulating cooling water system scale inhibition, corrosion inhibition, suitable for low hardness water quality in southern China; HPAA can be widely used in steel, petrochemical, electric power, the scale inhibition and corrosion inhibition of circulating cooling water system in medicine and other industries are generally compounded with zinc salt to form corrosion inhibitor, which is suitable for low hardness water quality in Southern China and has scale inhibition effect.
cooling water systems / industrial water treatment
metal surface treatment as corrosion inhibitor for steel
1. Used as corrosion inhibitor. HPAA has excellent corrosion inhibition performance, especially in low hardness, low alkalinity, and strong corrosive water, it shows extremely strong corrosion inhibition effect.
HPAA has a good chelation with divalent ions.
HPAA can be used as a metal ion stabilizer to effectively stabilize Fe2+, Fe3+, Mn2+, Al3+ plasma in water to reduce corrosion and scaling.
HPAA can significantly reduce the deposition of calcium carbonate and silica.
Good scale inhibition performance, but HPAA has slightly worse scale inhibition performance for calcium sulfate scale.
In order to avoid the decomposition of HPAA by the oxidizing bactericide, a protective agent can be used, but it is less affected by residual chlorine (0.5-1.0 mg/L) in the cooling water system of intermittent chlorination.
The combined use of HPAA and zinc salt has obvious synergistic corrosion inhibition effect. The recommended concentration is generally 5 ~ 30mg/L.
Dosing equipment should be resistant to acid corrosion.
2.HPAA is mainly used as a metal cathode corrosion inhibitor.
HPAA is widely used in the corrosion and scale inhibition of circulating cooling water systems in steel, petrochemical, power, medicine and other industries.
HPAA is suitable for use as a corrosion inhibitor for low hardness, easily corrodible water quality in southern China.
HPAA The compounding effect with zinc salt is better.
Organic corrosion and scale inhibitors composed of low molecular weight polymers have excellent performance.
HPAA is chemically stable, hard to be hydrolyzed, hard to be destroyed by acid or alkali, safety in use, no toxicity, no pollution.
HPAA can improve zinc solubility.
Its corrosion inhibition ability is 5-8 times better than that of HEDP and EDTMP.
When built with low molecular polymers, its corrosion inhibition effect is even better.
Specification:
Items: Index
Appearance: Dark umber liquid
Solid content %: 50.0min
Density (20℃)g/cm3: 1.30 min
pH(1% solution): 1.0-3.0
Usage:
HPAA is mainly used as cathode corrosion inhibitor in oilfield refill water system in fields such as steel & iron, petrochemcal, power plant and medical industries.
When built with zinc salt, the effect is even better.
2-Hydroxy Phosphonoacetic Acid (HPAA)
CAS No. 23783-26-8
Other Names: 2-Hydroxyphosphonocarboxylic Acid;Hydroxyphosphono-acetic acid; 2-HYDROXY PHOSPHONOACETIC ACID; HPA;
Molecular Formula: C2H5O6P
Molecular Weight: 156.00
Properties:
HPAA is chemically stable, hard to be hydrolyzed, hard to be destroyed by acid or alkali, safe in use, non-toxic and pollution-free. HPAA can improve zinc solubility.
Its corrosion inhibition efficiency is 5-8 times higher than that of HEDP and EDTMP.
When built with low molecular polymers, its corrosion inhibition effect is even better.
Usage:
HPAA is mainly used as cathode corrosion inhibitor in circulating cool water systems in fields such as steel & iron, petrochemcal, power plant and medical industries, suitable for low hardness and easily corrosive water quality.
When built with zinc salt, the effect is even better.
Package and storage:
Storage for twelve months in shady room.
HPAA is a powerful mild steel corrosion inhibitor for all-organic cooling water formulations.
HPAA reduces iron fouling which improves heat transfer efficiency.
Good biodegradability of HPAA makes it suitable in areas where the molybdenum discharge rate is regulated at very low levels.
HPAA can be easily monitored by a standard organophosphonate test kit.
HPAA is an environmentally acceptable corrosion inhibitor for carbon steel in cooling water systems.
HPAA gives better corrosion protection for carbon steel when used in conjunction with zinc or other phosphonates.
HPAA reduces iron fouling, thus improving heat transfer efficiency and reducing system maintenance costs.
HPAA is biodegradable and especially suitable in applications where the molybdate discharge is regulated OR all organic cooling water treatment is desired.
HPAA is expected to be susceptible to halogen attack.
HPAA is chemically stable, hard to be hydrolyzed, hard to be destroyed by acid or alkali, safety in use, no toxicity, no pollution.
HPAA can improve zinc solubility.
HPAA has superior performance than those commonly used phosphonates like HEDP and EDTMP (5-8 times better).
Sometimes HPAA can even replace molybdate and its derivatives.
The good efficiency at low concentration enables HPAA usually used at the PPM level.
HPAA is water-soluble and can increase Zn solubility.
Its effect can be further improved when built with Zn salts or polymer.
The main HPAA production route is as follows.
Phosphorus acid solution reacts with glyoxylic at 100-110°C for 4-10hours.
And then input water to prepare HPAA aqueous solution.
This reaction can be 1-step forward and starts from PCl3 hydrolysis.
Some research is studying to use microwave irradiation to replace the heating process for reducing energy consumption and reaction time.
Usage:
HPAA is mainly used as a cathode corrosion inhibitor in the oilfield refill water system in fields such as steel & iron, petrochemical, power plant, and medical industries.
When built with zinc salt, the effect is even better.
As a corrosion inhibitor, HPAA is mainly applied in the cooling water/industrial water system of oilfield, petrochemical plant and power plant.
HPAA is also used for metal surface treatment in steel.
About HPAA
Helpful information
HPAA is registered under the REACH Regulation and is manufactured in and / or imported to the European Economic Area, at ≥ 10 tonnes per annum.
HPAA is used in formulation or re-packing and at industrial sites.
Consumer Uses
ECHA has no public registered data indicating whether or in which chemical products the substance might be used. ECHA has no public registered data on the routes by which HPAA is most likely to be released to the environment.
Article service life
ECHA has no public registered data on the routes by which HPAA is most likely to be released to the environment. ECHA has no public registered data indicating whether or into which articles the substance might have been processed.
Widespread uses by professional workers
ECHA has no public registered data indicating whether or in which chemical products the substance might be used. ECHA has no public registered data on the types of manufacture using HPAA. ECHA has no public registered data on the routes by which HPAA is most likely to be released to the environment.
Formulation or re-packing
HPAA is used in the following products: pH regulators and water treatment products.
Release to the environment of HPAA can occur from industrial use: formulation of mixtures.
Uses at industrial sites
HPAA is used in the following products: pH regulators and water treatment products.
ECHA has no public registered data on the types of manufacture using HPAA. Release to the environment of HPAA can occur from industrial use: in processing aids at industrial sites.
Manufacture
ECHA has no public registered data on the routes by which HPAA is most likely to be released to the environment.
IUPAC NAMES:
2-hydroxy-2-phosphonoacetic acid
Acetic acid, 2-hydroxy-2-phosphono-
Hydroxyphosphono-acetic acid
Hydroxyphosphonoacetic Acid
Hydroxyphosphonoacetic acid
hydroxyphosphonoacetic acid
SYNONYMS:
hydroxyphosphono-aceticaci
2-HYDROXY PHOSPHONOACETIC ACID
Acetic acid, hydroxyphosphono-
2-Hydroxy Phosphonoacetic Acid (HPA)
HYDROXYPHOSPHONEACETICACID
HPA
HPAA
Hydroxyphosphono-acetic acid
2-HYDROXY PHOSPHONOACETIC ACID (HPA 0.5
2-Hydroxyphosphonocarboxylic Acid
2-Phosphonoglycolic acid
Belcor 575
Carboxyhydroxymethylphosphonic acid
Phosphonoglycolic acid
Hydroxyphosphono-Acetic Acid (HPAA)
ANTI-HEPARANASE (N-TERM) antibody produced in rabbit
Endo-glucoronidase
Heparanase [Precursor]
2-Hydroxy Phosphonoacetic Acid(HPAA)
Snailagglutinin
Acetic acid, 2-hydroxy-2-phosphono-
Heparanase-1
HPSE
HPSE1
2-Hydroxy-2-phosphonoacetic acid
Hydroxyphosphono-acetic acid-50% in H2O
Chemical auxiliary agent HPAA and Corrosion inhibitor HPAA
Hydroxy(phosphonooxy)acetic acid
2-Hydrophosphonylacetic acid
Hydroxyphosphono-acetic acid fandachem
Hydroxyphosphonoacetic Acid - 50% in water
