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2-PHOSPHONOGLYCOLIC ACID

2-Phosphonoglycolic acid is an organophosphorus compound with the molecular formula C₂H₅O₆P, consisting of a hydroxy group, a phosphonic acid group, and a carboxylic acid group attached to a two-carbon backbone.
2-Phosphonoglycolic acid is best known as a highly effective scale and corrosion inhibitor in industrial water treatment systems, where it prevents mineral deposition and protects mild steel, often showing performance 5–8 times better than commonly used phosphonates such as HEDP and EDTMP.
When used in combination with zinc salts, 2-Phosphonoglycolic acid exhibits strong synergistic effects, enhancing corrosion protection and improving metal ion stability in applications such as cooling water circuits, oilfields, petrochemical plants, and power generation facilities.

CAS Number: 23783-26-8
EC Number: 405-710-8
Molecular Formula: C2H5O6P
Molecular Weight: 156.03

Synonyms: 23783-26-8, 2-hydroxy-2-phosphonoacetic acid, Hydroxyphosphono-acetic acid, Acetic acid, hydroxyphosphono-, Hydroxyphosphonoacetic acid, Acetic acid, 2-hydroxy-2-phosphono-, DTXSID40865115, Hydroxyphosphonoacetic Acid - 50% in water, EC 405-710-8, 2-hydroxy-2-phosphono-acetic acid, Belclene 575, Acetic acid, hydroxyphosphono, Phosphono-hydroxy-acetic acid, SCHEMBL254667, 2-hydroxy-2-phosphonoaceticacid, Acetic acid, 2hydroxy2phosphono, DTXCID10813562, .alpha.-Hydroxyphosphonoacetic acid, MFCD20638215, .alpha.-Hydroxyl phosphonoacetic acid, AKOS015892863, FH28844, SY121936, 2-Hydroxy phosphono acetic acid, HPAA, HPA, CS-0158494, Hydroxyphosphono-acetic acid - 50% in water, NS00125792, E77112, 2-Hydroxy-2-phosphonoacetic acid, 50% in water, HYDROXYPHOSPHONO-ACETIC ACID (50% IN WATER), 405-710-8, 607-269-, hydroxyphosphono-aceticaci, 2-HYDROXY PHOSPHONOACETIC ACID, Acetic acid, hydroxyphosphono-, 2-Hydroxy Phosphonoacetic Acid (HPA), HYDROXYPHOSPHONEACETICACID, HPA, HPAA, Hydroxyphosphono-acetic acid

2-Phosphonoglycolic acid is an organophosphorus compound with the molecular formula C₂H₅O₆P, consisting of a hydroxy group, a phosphonic acid group, and a carboxylic acid group attached to a two-carbon backbone.
2-Phosphonoglycolic acid typically appears as a colorless to pale solid or concentrated aqueous solution, highly soluble in water due to its strongly polar functional groups.

2-Phosphonoglycolic acid is best known for its role as a scale and corrosion inhibitor in industrial water treatment systems, including cooling water circuits, boilers, and desalination plants, where it prevents the precipitation of calcium carbonate and other mineral scales by chelation and threshold inhibition.
Beyond water treatment, 2-Phosphonoglycolic acid is used in detergents, cleaning agents, and formulations requiring strong sequestering and dispersing activity.
2-Phosphonoglycolic acid's combination of phosphonate and hydroxyl functionality makes it chemically stable under harsh conditions, resistant to hydrolysis and oxidation, and highly effective even at low concentrations, ensuring long service performance in demanding industrial applications.

2-Phosphonoglycolic acid can cause eye irritation and skin sensitization; thus, appropriate personal protective equipment must be worn when handling it.
2-Phosphonoglycolic acid is a water-soluble organophosphorus compound.

2-Phosphonoglycolic acid has applications in various industries such as water treatment, detergents, and textile auxiliaries.
2-Phosphonoglycolic acid is a chemical compound with the molecular formula C2H5O6P.

2-Phosphonoglycolic acid is chemically stable, hard to be hydrolyzed, hard to be destroyed by acid or alkali, safety in use, no toxicity, no pollution.
2-Phosphonoglycolic acid can improve zinc solubility.

2-Phosphonoglycolic acid is low, but its disposal should follow local regulations to avoid contamination of water bodies or soil.
2-Phosphonoglycolic acid is chemically stable, hard to be hydrolyzed, hard to be destroyed by acid or alkali, safety in use, no toxicity, no pollution.

2-Phosphonoglycolic acid can improve zinc solubility.
2-Phosphonoglycolic acid has superior performance than those commonly used phosphonates like HEDP and EDTMP (5-8 times better).

Sometimes 2-Phosphonoglycolic acid can even replace molybdate and 2-Hydroxyphosphonocarboxylic Acid's derivatives.
The good efficiency at low concentration enables 2-Phosphonoglycolic acid usually used at the PPM level.

2-Phosphonoglycolic acid is water-soluble and can increase Zn solubility.
2-Phosphonoglycolic acid's effect can be further improved when built with Zn salts or polyme

2-Phosphonoglycolic acid considered being a mild steel corrosion inhibitor and is mainly used in the water treatment industry.
2-Phosphonoglycolic acid shows superior performance in all organic formulations compared to commonly used Phosphonates.

In certain formulations 2-Phosphonoglycolic acid can replace Molybdate or its derivatives.
2-Phosphonoglycolic acid is a good scale inhibitor.

2-Phosphonoglycolic acid's appearance is a dark brown liquid with a molecular formula of C2H5O6P and a relative molecular mass of 156.03.
2-Phosphonoglycolic acid is an organic phosphine scale and corrosion inhibitor with low phosphorus content.

2-Phosphonoglycolic acid's molecule contains phosphonic acid group, carboxylic acid group and hydroxyl group.
2-Phosphonoglycolic acid has excellent performance in scale and corrosion inhibition, especially in soft water and high hardness water.

In addition, the 2-Phosphonoglycolic acid has the characteristics of low phosphorus, good thermal stability, low toxicity, etc.
2-Phosphonoglycolic acid can achieve good compatibility and synergy with some common water stabilizers.

2-Phosphonoglycolic acid can achieve better corrosion inhibition when used with zinc salt.
2-Phosphonoglycolic acid is chemically stable, hard to be hydrolyzed, hard to be destroyed by acid or alkali, safety in use, no toxicity, no pollution.

2-Phosphonoglycolic acid can improve zinc solubility.
2-Phosphonoglycolic acid is corrosion inhibition ability is 5-8 times better than that of HEDP and EDTMP.

2-Phosphonoglycolic acid is suitable for use as a corrosion inhibitor for low hardness, easily corrodible water quality in southern China.
2-Phosphonoglycolic acid the compounding effect with zinc salt is better.

Organic corrosion and scale inhibitors composed of low molecular weight polymers have excellent performance.
2-Phosphonoglycolic acid is used as corrosion inhibitor.

2-Phosphonoglycolic acid, is most commonly used as an organic corrosion inhibitor for mild steel in cooling water treatment programs.
2-Phosphonoglycolic acid has excellent corrosion inhibition performance, especially in low hardness, low alkalinity, and strong corrosive water, 2-

Hydroxyphosphonocarboxylic acid shows extremely strong corrosion inhibition effect.
2-Phosphonoglycolic acid has a good chelation with divalent ions.

2-Phosphonoglycolic acid can be used as a metal ion stabilizer to effectively stabilize Fe2+, Fe3+, Mn2+, Al3+ plasma in water to reduce corrosion and scaling; 2-Hydroxyphosphonocarboxylic Acid can significantly reduce the deposition of calcium carbonate and silica.
Good scale inhibition performance, but 2-Phosphonoglycolic acid has slightly worse scale inhibition performance for calcium sulfate scale.

In order to avoid the decomposition of 2-Phosphonoglycolic acid by the oxidizing bactericide, a protective agent can be used, but 2-Phosphonoglycolic acid is less affected by residual chlorine (0.5-1.0 mg/L) in the cooling water system of intermittent chlorination.
The combined use of 2-Phosphonoglycolic acid and zinc salt has obvious synergistic corrosion inhibition effect.

2-Phosphonoglycolic acid 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, 2-Phosphonoglycolic acid is mainly applied in the cooling water/industrial water system of oilfield, petrochemical plant and power plant.
2-Phosphonoglycolic acid is also used for metal surface treatment in steel.

2-Phosphonoglycolic acid is a powerful mild steel corrosion inhibitor for all-organic cooling water formulations.
2-Phosphonoglycolic acid reduces iron fouling which improves heat transfer efficiency.

Good biodegradability of 2-Phosphonoglycolic acid makes it suitable in areas where the molybdenum discharge rate is regulated at very low levels.
2-Phosphonoglycolic acid can be easily monitored by a standard organophosphonate test kit.

2-Phosphonoglycolic acid is an environmentally acceptable corrosion inhibitor for carbon steel in cooling water systems.
2-Phosphonoglycolic acid gives better corrosion protection for carbon steel when used in conjunction with zinc or other phosphonates.

2-Phosphonoglycolic acid reduces iron fouling, thus improving heat transfer efficiency and reducing system maintenance costs.
2-Phosphonoglycolic acid is biodegradable and especially suitable in applications where the molybdate discharge is regulated OR all organic cooling water treatment is desired.

2-Phosphonoglycolic acid is expected to be susceptible to halogen attack.
2-Phosphonoglycolic acid is chemically stable, hard to be hydrolyzed, hard to be destroyed by acid or alkali, safety in use, no toxicity, no pollution.

2-Phosphonoglycolic acid can improve zinc solubility.
2-Phosphonoglycolic acid has superior performance than those commonly used phosphonates like HEDP and EDTMP (5-8 times better).

Sometimes 2-Phosphonoglycolic acid can even replace molybdate and its derivatives.
The good efficiency at low concentration enables 2-Phosphonoglycolic acid usually used at the PPM level.

2-Phosphonoglycolic acid is water-soluble and can increase Zn solubility.
2-Phosphonoglycolic acid is effect can be further improved when built with Zn salts or polymer.
The structural formula of 2-Phosphonoglycolic acid is H2C(OH)C(PO3H2)2.

2-Phosphonoglycolic acid contains a phosphorus atom bonded to two hydroxyl groups and a carboxylic acid group.
2-Phosphonoglycolic acid is a colorless to pale yellow liquid.

2-Phosphonoglycolic acid is soluble in water.
2-Phosphonoglycolic acid exhibits both acidic and hydrophilic properties.

2-Phosphonoglycolic acid is commonly used in water treatment applications as a scale and corrosion inhibitor.
2-Phosphonoglycolic acid helps prevent the formation of scale deposits on surfaces and reduces corrosion in water-based systems.

2-Phosphonoglycolic acid functions as a chelating agent, forming stable complexes with metal ions in water.
This property is useful in various industrial processes where metal ion control is critical.
2-Phosphonoglycolic acid is employed in industrial water treatment processes, such as cooling water systems, boilers, and other applications where the control of scale and corrosion is essential.

2-Phosphonoglycolic acid is used in the oil and gas industry to control scale formation and corrosion in drilling and production operations.
2-Phosphonoglycolic acid is considered to be biodegradable under typical environmental conditions.
2-Phosphonoglycolic acid is subject to regulations, and its concentration in formulations should comply with industry guidelines and regulatory standards.

As with any chemical, safety precautions should be followed during handling.
2-Phosphonoglycolic acid's important to consult safety data sheets (SDS) for specific information on handling, storage, and emergency procedures.
Additionally, advancements in technology and research may lead to the development of new formulations or applications for 2-Phosphonoglycolic acid, expanding its potential uses and market reach.

However, it’s important to note that the future prospect of 2-Phosphonoglycolic acid will also be influenced by factors such as regulatory changes, competition from alternative products, and market trends in the industries it serves.
For the most accurate and up-to-date information on the future prospect of 2-Phosphonoglycolic acid, consulting industry reports, market analysis, and expert opinions within the field of water treatment chemicals would be beneficial.

Ultimately, the future prospect of 2-Phosphonoglycolic acid will be shaped by its ability to meet evolving industry needs, regulatory requirements, and technological advancements.
2-Phosphonoglycolic acid's corrosion inhibition ability is 5-8 times better than that of HEDP and EDTMP.
When built with low molecular polymers, 2-Phosphonoglycolic acid's corrosion inhibition effect is even better.

White crystals with a phosphorus content of 19.8% and a melting point of 165-167.5 °c.
The pH value of 1% aqueous solution is 1, which can be miscible with water in any proportion.
2-Phosphonoglycolic acid is a viscous dark brown, 50% active solution that is soluble in water, ethylene, methanol, and 50% caustic soda.

The future prospect of 2-Phosphonoglycolic acid is largely dependent on its continued relevance and application in various industries.
2-Phosphonoglycolic acid is also known by its IUPAC name, phosphonoglycine.
2-Phosphonoglycolic acid is commonly used as a scale and corrosion inhibitor in water treatment, as well as in other applications such as the textile industry, detergent formulations, and oil field applications.

In terms of future prospects, 2-Phosphonoglycolic acid’s demand may continue to grow due to the increasing need for effective water treatment solutions in industrial and municipal settings.
As environmental regulations become more stringent, the demand for environmentally friendly and sustainable water treatment chemicals like 2-Phosphonoglycolic acid may also increase.

2-Phosphonoglycolic acid belongs to the class of phosphonic acids, which are organophosphorus compounds containing a phosphorus-carbon bond.
2-Phosphonoglycolic acid reduces iron fouling which improves heat transfer efficiency.

The molecular formula of 2-Phosphonoglycolic acid is C2H5O6P, and its structure consists of a phosphorus atom attached to two hydroxyl groups and a carboxylic acid group.
This structure imparts both acidic and chelating properties to the compound.

2-Phosphonoglycolic acid is known by several alternative names, including Hydroxyphosphono-acetic Acid, Hydroxyethylidene Diphosphonic Acid, and 1-Hydroxyethylidene-1,1-Diphosphonic Acid (HEDP).
2-Phosphonoglycolic acid is stable over a broad pH range, making it suitable for applications in both acidic and alkaline environments.

This versatility contributes to 2-Phosphonoglycolic acid's effectiveness in various industrial processes.
2-Phosphonoglycolic acid is often used in combination with other water treatment chemicals to achieve synergistic effects.

This combination enhances its performance as a scale and corrosion inhibitor.
2-Phosphonoglycolic acid exhibits stability over a range of temperatures, allowing its use in systems where fluctuations in temperature may occur, such as in cooling water systems.
2-Phosphonoglycolic acid's biodegradability is a positive environmental factor.

Biodegradable compounds are generally more environmentally friendly as they break down into non-harmful substances over time.
2-Phosphonoglycolic acid is typically dosed into water systems at concentrations determined by the specific requirements of the application.

The dosing levels depend on factors such as water hardness, pH, and temperature.
In addition to its use in cooling water systems, 2-Phosphonoglycolic acid is employed in boiler water treatment to prevent scale formation and corrosion in boilers.

2-Phosphonoglycolic acid is compatible with many other water treatment chemicals, allowing for its incorporation into multifunctional formulations for comprehensive water treatment.
The quality and purity of 2-Phosphonoglycolic acid are crucial for its effectiveness in water treatment applications.

Manufacturers adhere to specific quality standards to ensure the reliability of the product.
2-Phosphonoglycolic acid is widely used in various industries, including power plants, chemical manufacturing, and oil refineries, where water quality maintenance is essential.

2-Phosphonoglycolic acid is biodegradable and especially suitable in applications where the molybdate discharge is regulated OR all organic cooling water treatment is desired.
2-Phosphonoglycolic acid is expected to be susceptible to halogen attack.

2-Phosphonoglycolic acid is mainly used as a cathodic corrosion inhibitor for metals.
2-Phosphonoglycolic acid is widely used as a corrosion and scale inhibitor for recirculating cooling water systems in steel, petrochemical, power, and pharmaceutical industries.

2-Phosphonoglycolic acid can also be combined with common organic phosphine, polymer and other monomers to form scale and corrosion inhibitors.
In combination with zinc salt, the performance of corrosion inhibition will be better.
2-Phosphonoglycolic acid is a colorless to light yellow liquid with an odor reminiscent of acetic acid.

2-Phosphonoglycolic acid is soluble in water and organic solvents.
2-Phosphonoglycolic acid has low volatility and a high boiling point.
2-Phosphonoglycolic acid finds use in the production of pharmaceuticals, agrochemicals, and dyes.

2-Phosphonoglycolic acid is corrosion inhibition ability is 5-8 times better than that of HEDP and EDTMP.
When built with low molecular polymers, 2-Phosphonoglycolic acid's corrosion inhibition effect is even better.

2-Phosphonoglycolic acid is corrosion inhibition ability is 5-8 times better than that of HEDP and EDTMPA.Na.
When built with low molecular polymers, 2-Phosphonoglycolic acid is corrosion inhibition 5 effect is even better.

In order to avoid the decomposition of 2-Phosphonoglycolic acid by the oxidizing bactericide, the protective agent can be used, but the residual chlorine (0.5~1-0 mg/L) is less affected in the intermittent chlorination cooling water system.
The combination of 2-Phosphonoglycolic acid and zinc salt has obvious synergistic corrosion inhibition effect.

The recommended concentration is generally 5 to 30mg/L.
Acid corrosion resistance shall be provided for each medicine.
2-Phosphonoglycolic acid is a powerful mild steel corrosion inhibitor for all-organic cooling water formulations.

Uses of 2-Phosphonoglycolic Acid:
2-Phosphonoglycolic acid is used in Cleaning-in-Place systems in various industries to prevent scaling and fouling in pipes and equipment during cleaning processes.
2-Phosphonoglycolic acid 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-Phosphonoglycolic acid is used as corrosion inhibitor.
2-Phosphonoglycolic acid is 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.

2-Phosphonoglycolic acid 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.
2-Phosphonoglycolic acid has a good chelating effect with divalent ions, which can be used as a metal ion stabilizer to effectively stabilize Fe2, Fe3, Mn2 and Al3 plasma in water and reduce corrosion and scaling.

2-Phosphonoglycolic acid can significantly reduce the deposition of calcium carbonate and silicon dioxide, and has good scale inhibition performance, but the scale inhibition performance of 2-Phosphonoglycolic acid on calcium sulfate scale is slightly poor.
2-Phosphonoglycolic acid is mainly used as the cathodic corrosion inhibitor for metals, but also widely used to realize corrosion inhibition and scale inhibition in circulating cooling water system of steel, petrochemical, electric power, pharmaceutical and other industries.

2-Phosphonoglycolic acid is specially suitable for low hardness and easy-corrosive water quality.
2-Phosphonoglycolic acid is mainly used as cathode corrosion inhibitor for metals, in cooling water systems of steel & iron, petrochemcal, power plant and medical industries.
When built with zinc salt, the effect is even better.

2-Phosphonoglycolic acid is used as corrosion inhibitor.
2-Phosphonoglycolic acid has excellent corrosion inhibition performance, especially in low hardness, low alkalinity, and strong corrosive water, it shows extremely strong corrosion inhibition effect.
2-Phosphonoglycolic acid has a good chelation with divalent ions.

2-Phosphonoglycolic acid can be used as a metal ion stabilizer to effectively stabilize Fe2+, Fe3+, Mn2+, Al3+ plasma in water to reduce corrosion and scaling.
2-Phosphonoglycolic acid can significantly reduce the deposition of calcium carbonate and silica.

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.
2-Phosphonoglycolic acid 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.

2-Phosphonoglycolic acid is mainly used as a metal cathode corrosion inhibitor.
2-Phosphonoglycolic acid is widely used in the corrosion and scale inhibition of circulating cooling water systems in steel, petrochemical, power, medicine and other industries.

2-Phosphonoglycolic acid is suitable for use as a corrosion inhibitor for low hardness, easily corrodible water quality in southern China.
2-Phosphonoglycolic acid The compounding effect with zinc salt is better.

Organic corrosion and scale inhibitors composed of low molecular weight polymers have excellent performance.
2-Phosphonoglycolic acid is chemically stable, hard to be hydrolyzed, hard to be destroyed by acid or alkali, safety in use, no toxicity, no pollution.

2-Phosphonoglycolic acid can improve zinc solubility.
2-Phosphonoglycolic acid is corrosion inhibition ability is 5-8 times better than that of HEDP and EDTMP.
When built with low molecular polymers, 2-Phosphonoglycolic acid's corrosion inhibition effect is even better.

One of the primary uses of 2-Phosphonoglycolic acid is as a scale inhibitor in water treatment processes.
2-Phosphonoglycolic acid helps prevent the formation of mineral scale deposits on surfaces, such as in cooling water systems, boilers, and heat exchangers.

Additionally, 2-Phosphonoglycolic acid exhibits corrosion inhibition properties, protecting metal surfaces from corrosion.
2-Phosphonoglycolic acid acts as a chelating agent by forming stable complexes with metal ions in water.

This is particularly useful in preventing the deleterious effects of metal ions in industrial processes.
2-Phosphonoglycolic acid's ability to sequester metal ions contributes to its effectiveness in controlling water hardness.

2-Phosphonoglycolic acid is commonly used in cooling water systems, such as those in power plants, industrial facilities, and HVAC (Heating, Ventilation, and Air Conditioning) systems.
2-Phosphonoglycolic acid helps maintain the efficiency of heat exchange equipment by preventing scale formation and corrosion.

In boiler systems, 2-Phosphonoglycolic acid is employed to inhibit scale formation on heat transfer surfaces and prevent corrosion.
Proper boiler water treatment is essential for the longevity and efficiency of boiler systems.

2-Phosphonoglycolic acid is utilized in the oil and gas industry for scale and corrosion control in drilling and production operations.
2-Phosphonoglycolic acid helps maintain the integrity of equipment and pipelines.

In certain industrial processes, 2-Phosphonoglycolic acid may be used in metal cleaning formulations to inhibit scale formation and improve the cleaning efficiency of solutions.
2-Phosphonoglycolic acid can find applications in the textile industry for controlling water hardness and preventing scale buildup in water used for various processes.
In some cases, 2-Phosphonoglycolic acid may be used in residential water treatment applications to address issues related to water hardness and scale buildup in domestic water systems.

2-Phosphonoglycolic acid may be used in the concrete and cement industry to control water hardness and prevent scale formation in water used in various processes.
In household cleaning products and detergents, 2-Phosphonoglycolic acid can act as a sequestrant, binding metal ions in water and improving the effectiveness of the cleaning agents.

2-Phosphonoglycolic acid has excellent corrosion inhibition performance, especially in low hardness, low alkalinity, and strong corrosive water, it shows extremely strong corrosion inhibition effect.
2-Phosphonoglycolic acid has a good chelation with divalent ions.

In order to avoid the decomposition of 2-Phosphonoglycolic acid 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 2-Phosphonoglycolic acid 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-Phosphonoglycolic acid is mainly used as a metal cathode corrosion inhibitor.

2-Phosphonoglycolic acid is widely used in the corrosion and scale inhibition of circulating cooling water systems in steel, petrochemical, power, medicine and other industries.
2-Phosphonoglycolic acid is suitable for use as a corrosion inhibitor for low hardness, easily corrodible water quality in southern China.

2-Phosphonoglycolic acid The compounding effect with zinc salt is better.
Organic corrosion and scale inhibitors composed of low molecular weight polymers have excellent performance.

2-Phosphonoglycolic acid is used in preparation method of salt-resistant calcium-magnesium resistant polymer colloid system and its application in oil reservoir oil displacement.
In water treatment systems, including reverse osmosis units, 2-Phosphonoglycolic acid may be used to control scale formation on membrane surfaces, helping maintain the efficiency of the filtration process.

2-Phosphonoglycolic acid can find applications in mining operations where water treatment is crucial for processing minerals.
2-Phosphonoglycolic acid may assist in preventing scale formation and corrosion in water systems used in mining processes.

2-Phosphonoglycolic acid may be used in the food and beverage industry to address water hardness issues in various processes, ensuring the efficient operation of equipment and preventing scale accumulation.
In the pulp and paper industry, 2-Phosphonoglycolic acid can be utilized in water treatment processes to control scale formation and maintain the efficiency of equipment, such as boilers and evaporators.

2-Phosphonoglycolic acid has been used in the photographic industry as a stabilizing agent and for controlling metal ions in certain chemical solutions.
2-Phosphonoglycolic acid may be incorporated into industrial cleaning formulations to enhance their efficacy by preventing scale buildup and improving the cleaning performance.
In aquaculture systems, 2-Phosphonoglycolic acid may be used to control water quality by preventing scale formation and corrosion in equipment used in fish farms.

In systems employing membranes, such as ultrafiltration and nanofiltration, 2-Phosphonoglycolic acid can be used as a cleaning agent to remove scale deposits and improve membrane efficiency.
2-Phosphonoglycolic acid may be included in dishwashing detergents to act as a water softener, preventing the formation of limescale on dishware and utensils.

Benefits of 2-Phosphonoglycolic Acid:
2-Phosphonoglycolic acid offers several distinct benefits that make it superior to many conventional scale and corrosion inhibitors.
2-Phosphonoglycolic acid's unique molecular structure, containing both phosphonate and hydroxyl functional groups, provides strong chelation, threshold inhibition, and dispersing abilities, allowing it to effectively prevent scale formation even at very low concentrations.

Unlike some organic acids, 2-Phosphonoglycolic acid demonstrates excellent thermal and oxidative stability, meaning it can withstand harsh industrial conditions such as high temperatures, high alkalinity, and oxidizing environments without losing performance.
This stability extends 2-Phosphonoglycolic acid's service life and reduces the frequency of chemical dosing, lowering operational costs.

Another major benefit is its dual action: 2-Phosphonoglycolic acid not only prevents scale deposition but also provides reliable corrosion protection, particularly for carbon steel and other commonly used industrial alloys.
Furthermore, 2-Phosphonoglycolic acid is highly soluble in water and compatible with other treatment chemicals, making it easy to formulate into multi-functional blends used in power plants, petrochemical systems, desalination plants, and cooling towers.
Overall, 2-Phosphonoglycolic acid’s combination of efficiency at low dosage, resistance to degradation, and multifunctional performance makes it an economical and dependable solution for long-term water treatment and industrial process protection.

Production of 2-Phosphonoglycolic Acid:
2-Phosphonoglycolic acid is produced industrially through controlled phosphonation reactions involving acetic acid derivatives.
The most common method starts with chloroacetic acid or 2-Phosphonoglycolic acid's salts, which are reacted with phosphorous acid (H₃PO₃) under acidic conditions.

In this process, the hydroxyl-phosphonomethyl group is introduced onto the acetic acid backbone through nucleophilic substitution, yielding 2-Phosphonoglycolic acid as the main product.
The reaction typically requires elevated temperatures and careful pH adjustment to achieve good conversion while minimizing by-products.

The crude product is obtained as an aqueous solution, which may be purified and concentrated depending on the application.
Industrial 2-Phosphonoglycolic acid is usually marketed as a 50% aqueous solution, stable and ready for blending into water treatment formulations.
The process is designed for high efficiency and cost-effectiveness, ensuring large-scale production suitable for use in power generation, petrochemical, paper, and desalination industries.

Synthesis of 2-Phosphonoglycolic Acid:
2-Phosphonoglycolic acid is synthesized mainly through the reaction of phosphorous acid (H₃PO₃) with chloroacetic acid (ClCH₂COOH) under controlled acidic conditions.
In this process, the phosphorous acid acts as a nucleophile, attacking the carbon atom of chloroacetic acid to substitute the chlorine atom, resulting in the formation of the –CH₂–PO₃H₂ group on the acetic acid backbone.

The overall reaction produces 2-Phosphonoglycolic acid as the primary product, often in aqueous solution, along with small amounts of by-products such as orthophosphoric acid.
The synthesis is typically carried out at elevated temperatures (around 80–100 °C) with pH regulation to optimize yield and prevent excessive side reactions.

Sometimes catalysts or stabilizers are added to improve conversion efficiency.
After reaction completion, the mixture is neutralized, filtered if necessary, and concentrated to give commercial 2-Phosphonoglycolic acid, usually supplied as a 30–50% water solution.
This relatively straightforward synthetic route allows for cost-effective large-scale production, making 2-Phosphonoglycolic acid widely available for water treatment and industrial applications.

History of 2-Phosphonoglycolic Acid:
2-Phosphonoglycolic acid emerged in the second half of the 20th century as part of the search for more effective and stable scale and corrosion inhibitors for industrial water systems.
Earlier generations of inhibitors, such as polyphosphates and simple organics, often suffered from hydrolytic instability, limited performance at high temperatures, and poor resistance to oxidizing conditions.

In response, researchers in the 1970s and 1980s began developing organophosphonates, compounds combining phosphonate groups with organic backbones, which showed much greater durability.
2-Phosphonoglycolic acid was introduced during this wave of innovation, offering a unique balance of hydroxyl and phosphonate functionalities, giving it superior threshold inhibition and dispersing capacity compared to traditional inhibitors.

2-Phosphonoglycolic acid's adoption grew steadily in industries such as power generation, petrochemicals, and desalination, where long-term reliability under demanding conditions was critical.
Over time, 2-Phosphonoglycolic acid gained recognition not only for its scale-control properties but also for its dual action as a corrosion inhibitor, leading to widespread use in multifunctional formulations.
Today, 2-Phosphonoglycolic acid is regarded as one of the most important phosphonate-based additives in water treatment, representing a significant advancement in the history of industrial chemical additives.

Handling and Storage of 2-Phosphonoglycolic Acid:
Handle 2-Phosphonoglycolic acid in well-ventilated areas and avoid inhalation, ingestion, or direct contact with skin and eyes.
Wear appropriate protective equipment, including gloves, safety goggles, and protective clothing.

Eating, drinking, and smoking should be prohibited in work areas.
Store in tightly closed, corrosion-resistant containers in a cool, dry, and well-ventilated place.
Protect from direct sunlight, excessive heat, and incompatible materials such as strong oxidizers and bases.

Stability and Reactivity of 2-Phosphonoglycolic Acid:
2-Phosphonoglycolic acid is stable under normal handling and storage conditions.
2-Phosphonoglycolic acid decomposes at elevated temperatures (>200 °C), releasing phosphorus oxides, phosphoric acid derivatives, and carbon oxides.

2-Phosphonoglycolic acid is incompatible with strong oxidizing agents, strong acids, and strong bases.
Prolonged exposure to high alkalinity (pH > 10) can cause gradual decomposition.
When stored in acidic aqueous solution at room temperature, 2-Phosphonoglycolic acid remains stable for extended periods.

First Aid Measures of 2-Phosphonoglycolic Acid:

Inhalation:
Move the exposed person to fresh air.
If breathing is difficult, administer oxygen.
Seek medical attention if symptoms persist.

Skin contact:
Remove contaminated clothing and wash skin thoroughly with plenty of water and soap.
Get medical advice if irritation develops.

Eye contact:
Rinse cautiously with water for at least 15 minutes, lifting upper and lower eyelids occasionally.
Remove contact lenses if present and easy to do.
Seek immediate medical attention.

Ingestion:
Rinse mouth with water.
Do not induce vomiting unless directed by medical personnel.
Seek medical assistance immediately.

Firefighting Measures of 2-Phosphonoglycolic Acid:
2-Phosphonoglycolic acid itself is non-flammable, but thermal decomposition may produce corrosive or toxic fumes.
In case of fire in the surrounding area, use dry chemical, CO₂, alcohol-resistant foam, or water spray.

Firefighters should wear self-contained breathing apparatus (SCBA) and protective clothing.
Cool exposed containers with water spray to prevent rupture.

Accidental Release Measures of 2-Phosphonoglycolic Acid:
Evacuate non-essential personnel and ensure proper ventilation.
Wear suitable personal protective equipment.

Prevent release into sewers and surface water.
Absorb small spills with inert absorbent materials (sand, vermiculite, diatomaceous earth) and place in suitable containers for disposal.

For large spills, contain the material, pump into salvage containers, and wash contaminated surfaces with plenty of water.
Dispose of waste according to local regulations.

Exposure Controls / Personal Protective Equipment of 2-Phosphonoglycolic Acid:

Engineering controls:
Use fume hoods, closed systems, or local exhaust ventilation to minimize exposure.

Respiratory protection:
If ventilation is inadequate or exposure limits are exceeded, use an approved respirator suitable for acidic vapors.

Skin protection:
Wear chemical-resistant gloves (e.g., nitrile, neoprene) and protective clothing.

Eye protection:
Safety goggles or face shields are recommended.

Hygiene measures:
Wash hands and exposed skin thoroughly after handling.
Do not eat, drink, or smoke during handling.

Identifiers of 2-Phosphonoglycolic Acid:
IUPAC Name: 2-hydroxy-2-phosphonoacetic acid
Common Name: 2-Phosphonoglycolic acid
Abbreviation: HPAA
CAS Number: 23783-26-8
EC Number (EINECS): 245-118-7
PubChem CID: 2724115
ChemSpider ID: 2006577
Molecular Formula: C₂H₅O₆P
Molecular Weight: 156.03 g/mol
InChI: InChI=1S/C2H5O6P/c3-1(2(4)5)9(6,7)8/h1,3H,(H,4,5)(H2,6,7,8)
InChI Key: FDMFVRGQCDUSNY-UHFFFAOYSA-N
SMILES (Canonical): C(C(=O)O)(O)P(=O)(O)O
HS Code (Customs Tariff): 2931.90 (Other organo-inorganic compounds)

IUPAC Name: 2-hydroxy-2-phosphonoacetic acid
Abbreviation: HPAA
CAS Number: 23783-26-8
EC Number (EINECS): 245-118-7
RTECS Number: Not assigned (may be registered under general organophosphonate category)
PubChem CID: 2724115
ChemSpider ID: 2006577
ChEBI ID: 76102
UNII (FDA Unique Ingredient Identifier): Not assigned
Beilstein Registry Number: 1754763
Merck Index: Listed under organophosphonate compounds

Molecular Formula: C₂H₅O₆P
Molecular Weight: 156.03 g/mol
Exact Mass: 155.99 g/mol
Elemental Composition: C (15.4%), H (3.2%), O (61.5%), P (19.9%)

InChI: InChI=1S/C2H5O6P/c3-1(2(4)5)9(6,7)8/h1,3H,(H,4,5)(H2,6,7,8)
InChI Key: FDMFVRGQCDUSNY-UHFFFAOYSA-N
Canonical SMILES: C(C(=O)O)(O)P(=O)(O)O
Isomeric SMILES: C(C(=O)[O-])(O)P(=O)(O)O

Properties of 2-Phosphonoglycolic Acid:
Molecular Formula: C₂H₅O₆P
Molecular Weight: 156.03 g/mol
Appearance: Colorless to pale yellow liquid in commercial form (30–50% aqueous solution); pure substance can be obtained as a hygroscopic crystalline solid.
Odor: Mild acidic odor.
Taste: Acidic, sour (not intended for ingestion).
Physical State: Solid (pure) or aqueous liquid (technical grade).

Density: 1.30 – 1.35 g/cm³ (50% aqueous solution, 20 °C)
Melting Point (pure solid): ~155–160 °C (with decomposition, no sharp melting point)
Boiling Point: Not well-defined; decomposes upon heating >200 °C; aqueous solution boils around 100–105 °C depending on concentration
pH (1% solution): 2.0 – 3.0 (strongly acidic)
Refractive Index (n²⁰ᴰ): ~1.420 – 1.430 (for 50% solution at 20 °C)
Viscosity: Moderate; ~20–30 mPa·s (50% solution at 25 °C)

Boiling point: 557.7±60.0 °C(Predicted)
Density: 1.37 (50% aq.)
storage temp.: -20°C
solubility: DMSO (Slightly), Methanol (Slightly)
form: Oil
pka: 2.05±0.10(Predicted)
color: Brown to Dark Brown

Molecular Formula: C₂H₅O₆P
Molecular Weight: 156.03 g/mol
Appearance: Colorless to pale yellow liquid (usually supplied as a 30–50% aqueous solution); may crystallize in pure form as a hygroscopic solid.
Odor: Mild, characteristic acidic odor.
Physical State: Usually handled in aqueous solution for stability and ease of dosing.

Density: ~1.30 – 1.35 g/cm³ (50% solution at 20 °C)
Melting Point (pure): ~150–160 °C (decomposes before melting clearly)
Boiling Point: Decomposes; aqueous solution boils ~100–105 °C depending on concentration
pH (1% solution): 2.0 – 3.0 (acidic)
Refractive Index: ~1.42 (50% solution, 20 °C)

Solubility:
Water: Fully miscible, highly soluble
Alcohols (ethanol, methanol): Soluble
Other polar solvents: Soluble
Non-polar solvents (benzene, toluene, hydrocarbons): Insoluble