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Phosphino-Carboxylic Acid (PCA), abbreviated PCA, is an organic chemical compound.
Phosphino-Carboxylic Acid (PCA) is formed by binding phosphonic groups to the carboxylic group.
Phosphino-Carboxylic Acid (PCA) is an excellent diffuser for calcium carbonate and calcium phosphate deposits in circulating cooling systems.
CAS Number: 71050-62-9
Molecular Formula: (C3H4O2.H3O2P.Na)x
EINECS Number: 223-267-7
Synonyms: 2-Propenoic acid, polymer with sodium phosphinate, 2-Propenoic acid sodium phosphinate copolymer, 615-245-4, Acrylic acid sodium hypophosphite copolymer, Acrylic acid sodium phosphinate copolymer, DTXSID9050434, Phosphinic acid, sodium salt, polymer with 2-propenoic acid, Poly(acrylic acid-co-hypophosphite), sodium salt, Poly(acrylic acid-co-sodium hypophosphite), RefChem:483105, Sodium hypophosphite acrylic acid copolymer, 71050-62-9, belsperse 164;PCA;phosphino carboxylic acid;Poly (acrylic acid-co-hypophosphite) sodium salt;Phosphino Carboxilic Acid (PCA);Phosphino Carboxylic Acid(PCA);2-Propenoic acid,polyMer with sodiuM phosphinate (1:1);Phaseolus coccineus agglutinin
Phosphino-Carboxylic Acid (PCA) has good anti-fouling properties on barium sulfate, strontium sulfate, and silica deposits.
Phosphino-Carboxylic Acid (PCA) is a synthetic, water-soluble polymer that contains both carboxylic acid groups (–COOH) and phosphinic or phosphonic functional groups (–PO₂H₂ or –PO(OH)₂).
It is generally produced through the copolymerization of acrylic acid with phosphinic or phosphonic acid derivatives, which introduces both carboxyl and phosphino groups into the polymer backbone.
This dual functionality makes Phosphino-Carboxylic Acid (PCA) a very efficient dispersant and scale inhibitor because it can interact strongly with dissolved metal ions, such as calcium, barium, or iron, while also preventing solid particles from agglomerating.
Phosphino-Carboxylic Acid (PCA) is widely used in water treatment systems, including cooling towers, boilers, desalination plants, and oilfield water injection systems, where it helps to prevent the formation of mineral scales such as calcium carbonate, calcium sulfate, and barium sulfate.
Unlike some traditional scale inhibitors, Phosphino-Carboxylic Acid (PCA) remains effective over a wide pH range and at high temperatures, which makes it suitable for demanding environments.
Phosphino-Carboxylic Acid (PCA) also shows good resistance to hydrolysis and oxidative degradation, meaning it retains its performance even when exposed to chlorine, bromine, or other oxidizing agents commonly used in water treatment.
Phosphino-Carboxylic Acid (PCA), abbreviated PCA, is an organic chemical compound.
Phosphino-Carboxylic Acid (PCA) is formed by binding phosphonic groups to the carboxylic group.
Phosphino-Carboxylic Acid (PCA) is soluble/miscible in Water and Ethylene glycol in all proportions.
Phosphino-Carboxylic Acid (PCA) can be used without pH limitations.
Phosphino-Carboxylic Acid (PCA) does not form insoluble sodium or potassium salts.
Phosphino-Carboxylic Acid (PCA) is hydrolytically stable and can be incorporated into concentrated formulations regardless of the final pH.
Phosphino-Carboxylic Acid (PCA) is stable at temperatures up to 200°C.
Phosphino-Carboxylic Acid (PCA) is not affected by chlorine or other oxidizing biocides in standard.
Phosphino-Carboxylic Acid (PCA) associates characteristics of phosphonates as well as polyacrylates.
The function is to provide a special equilibrium of limit inhibition and also dispersancy.
Phosphino-Carboxylic Acid (PCA) has good tolerance to chlorine.
Phosphino-Carboxylic Acid (PCA) is also compatible with a lot of microbiological control agents.
The Phosphino-Carboxylic Acid (PCA) has excellent dispersion performance for the scale of calcium carbonate as well as calcium phosphate in circulating cool water
system.
The reason is via the introduction of a phosphonic group right into a carboxylic group.
In addition, Phosphino-Carboxylic Acid (PCA) has also good scale inhibition for barium sulfate, strontium sulfate as well as silica scale.
One more thing to note, Phosphino-Carboxylic Acid (PCA) can not be affected by chlorine or other oxidizing biocides in standard.
Phosphino-Carboxylic Acid (PCA) is through the introduction of the phosphonic group into a carboxylic group.
Phosphino-Carboxylic Acid (PCA) has good dispersion properties for calcium carbonate and calcium phosphate scale in circulating cool water systems.
Phosphino-Carboxylic Acid (PCA) has good scale inhibition for barium sulfate, strontium sulfate, and silica scale.
It has advantages in a wide range of water quality, chemical stability, strong chlorine tolerance, etc.
Phosphino-Carboxylic Acid (PCA) introduces a phosphonic acid group into the original carboxylic acid group, has good dispersion properties for calcium carbonate and calcium phosphate scale in circulating cooling water, and has a good inhibitory effect on the deposition of barium sulfate, strontium sulfate and silicon scale; It has synergistic effects when combined with other organic phosphonates and copolymers.
Suitable for a wide range of water quality, with good chemical stability, and has strong resistance to chlorine oxidation.
storage temp.: 2-8°C
Odor: Slight
Substances Added to Food (formerly EAFUS): POLY(ACRYLIC ACID-CO-HYPOPHOSPHITE), SODIUM SALT
EWG's Food Scores: 2-3
NCI Dictionary of Cancer Terms: PCA
Phosphino-Carboxylic Acid (PCA) associates characteristics of phosphonates and polyacrylates.
The function is to provide a special equilibrium of limit inhibition and dispersancy.
The Phosphino carboxylic acid (POCA) has good tolerance to chlorine.
Phosphino-Carboxylic Acid (PCA) is also compatible with a lot of microbiological control agents.
Another advantage of Phosphino-Carboxylic Acid (PCA) is its multifunctional behavior: in addition to scale inhibition, it also works as a dispersant for suspended solids, a corrosion inhibitor when blended with other chemicals, and a stabilizer for certain industrial formulations.
These properties come from the fact that its molecular structure allows it to both chelate or bind metal ions and disperse fine particles, reducing the risk of fouling and blockages in industrial equipment.
Phosphino-Carboxylic Acid (PCA) is also considered more environmentally friendly compared to some older phosphonate-based inhibitors, because it typically has a lower phosphorus content and better biodegradability.
This has led to its adoption in regions where environmental discharge regulations on phosphorus are strict, as it can deliver effective performance while minimizing ecological impact.
Phosphino-Carboxylic Acid (PCA) is a highly versatile polymeric compound, and what makes it particularly valuable is the unique synergy between its phosphino groups and its carboxylic acid groups.
The phosphino groups provide strong complexation and chelation properties, allowing PCA to bind efficiently with multivalent cations such as calcium, magnesium, barium, and iron.
Meanwhile, the carboxylic groups enhance its solubility in water and contribute to its ability to act as a dispersant, preventing the agglomeration or precipitation of mineral particles.
This combination gives Phosphino-Carboxylic Acid (PCA) a much broader and more reliable performance range than traditional water treatment additives like simple polyacrylates or phosphonates.
Because of these structural advantages, Phosphino-Carboxylic Acid (PCA) is particularly effective in preventing scale formation in high-stress operating conditions.
For instance, in power plants and industrial boilers, where feedwater often contains high hardness ions, PCA can inhibit the crystallization of calcium carbonate or calcium sulfate even at high supersaturation levels.
In cooling water systems, it not only prevents scaling but also keeps particulate matter such as iron oxides, clay, or silt dispersed, thereby reducing fouling on heat exchange surfaces.
This leads to improved energy efficiency, reduced maintenance costs, and longer equipment lifetimes.
In the oil and gas industry, Phosphino-Carboxylic Acid (PCA) is widely used in enhanced oil recovery and water injection processes, where mineral scale formation can block pipelines, wells, and processing equipment.
Its stability under high pressure, elevated temperatures, and harsh chemical environments makes it far more reliable than many conventional inhibitors.
Similarly, in reverse osmosis and desalination plants, PCA helps prevent scaling on membrane surfaces, which is critical for maintaining high water flow and reducing the frequency of chemical cleaning.
Beyond scale inhibition, Phosphino-Carboxylic Acid (PCA) can function as a dispersing agent in industrial formulations.
For example, it is used in the pulp and paper industry to control the deposition of calcium salts and pitch, in detergents and cleaners to improve soil dispersion, and in ceramic or pigment processing to stabilize suspensions.
Its strong dispersing capability arises from its ability to adsorb onto particle surfaces while providing electrostatic repulsion, keeping particles suspended in solution.
From an environmental and regulatory perspective, Phosphino-Carboxylic Acid (PCA) offers advantages over older phosphonate-based inhibitors such as ATMP (aminotris(methylenephosphonic acid)) or HEDP (1-hydroxyethylidene-1,1-diphosphonic acid), which contain higher levels of phosphorus and degrade slowly in natural environments.
Phosphino-Carboxylic Acid (PCA) is often designed to contain lower phosphorus content and better biodegradability, which reduces its contribution to eutrophication in natural waters.
This makes it more acceptable for use in regions with strict phosphorus discharge limits, such as in Europe under the EU Water Framework Directive.
Uses Of Phosphino-Carboxylic Acid (PCA):
Phosphino-Carboxylic Acid (PCA) is a hygroscopic moisturizing ingredient, it serves as a fine humec tant.
It is frequently used in moisturizing products.
Phosphino-Carboxylic Acid (PCA) delivers good thermal & chlorine stability.
As a result Phosphino-Carboxylic Acid (PCA) shows good activity over a wide range of pH, hardness & temperature without precipitation.
Superior boiler water sludge dispersant that outperforms polyacrylates, polymethacrylates & sulfonated polymers.
Dispersed sludge is removed in boiler water blowdown.
Phosphino-Carboxylic Acid (PCA) has superior hydrolytic and thermal stability compared to other polymers.
Phosphino carboxylic acid (PCA) maintains deposit dissolution & dispersancy properties in both low & high pressure boilers.
Phosphino functionally stabilises & prevents loss of Ca, Mg & Fe ions.
Phosphino-Carboxylic Acid (PCA) maintains iron in non-settling form reducing deposition potential.
Phosphino-Carboxylic Acid (PCA) is non-foaming and has good enviromental acceptability.
Phosphino-Carboxylic Acid (PCA) provides greater flexibility and better performance in developing multiple antiscalant programs for a variety of scales found in boiler systems, foods plants and cleaning applications.
Phosphino carboxylic acid has advantages in a wide range of water quality, chemical stability, strong chlorine tolerance, etc.
Engineers use phosphino carboxylic acid (PCA)as scale and corrosion inhibitor in circulating cool water system.
Phosphino-Carboxylic Acid (PCA) is also found in the oilfield refill water system.
Phosphino-Carboxylic Acid (PCA) is an excellent diffuser for calcium carbonate and calcium phosphate deposits in circulating cooling systems.
Phosphino-Carboxylic Acid (PCA) has good anti-fouling properties on barium sulfate, strontium sulfate, and silica deposits.
Phosphino carboxylic acid (PCA) can be used as anti-fouling and anti-corrosion in water circulation cooling systems and oil extraction systems by water.
Phosphino carboxylic acid (PCA) can be used as an inhibitor of sediments such as calcium carbonate, calcium sulfate, and barium sulfate
Phosphino-Carboxylic Acid (PCA) is widely used in many industries because its dual functional groups – the carboxylic acid groups and the phosphino groups – give it excellent dispersing power, chelation ability, and stability under harsh operating conditions.
One of its most important uses is in industrial water treatment, where Phosphino-Carboxylic Acid (PCA) is applied as a scale inhibitor and dispersant in systems such as cooling towers, boilers, and heat exchangers.
In these environments, Phosphino-Carboxylic Acid (PCA) prevents the deposition of mineral salts like calcium carbonate, calcium sulfate, and barium sulfate, which would otherwise form hard layers on metal surfaces, reducing heat transfer efficiency, increasing energy consumption, and potentially leading to equipment failure.
By keeping these salts in a dispersed and soluble form, Phosphino-Carboxylic Acid (PCA) helps maintain the long-term efficiency and reliability of industrial water systems.
Another major use of Phosphino-Carboxylic Acid (PCA) is in the oil and gas industry, where scale formation and fouling can significantly reduce the productivity of wells and pipelines.
Phosphino-Carboxylic Acid (PCA) is injected into waterflooding systems, downhole equipment, and surface facilities to prevent scaling even under high pressures, elevated temperatures, and chemically aggressive conditions.
Its stability in the presence of dissolved oxygen, oxidizing agents, and a wide pH range makes it highly effective for maintaining continuous operations in such demanding environments.
Phosphino-Carboxylic Acid (PCA) is also used extensively in desalination plants and reverse osmosis systems, where mineral scaling on membranes can reduce water output and shorten membrane lifespan.
Because Phosphino-Carboxylic Acid (PCA) is stable under high salt concentrations and resists degradation in oxidative environments, it helps ensure that desalination membranes remain clean and functional for longer periods, thereby reducing maintenance costs and extending system efficiency.
Because of its versatility, Phosphino-Carboxylic Acid (PCA) is often described as a multifunctional treatment chemical, providing scale inhibition, dispersing action, and even some corrosion inhibition when used in formulations with other additives.
This multifunctionality makes it valuable not only in heavy industries such as power generation, petrochemicals, and metallurgy, but also in smaller-scale applications where water quality control is critical to production efficiency and product quality.
Safety Profile Of Phosphino-Carboxylic Acid (PCA):
Phosphino-Carboxylic Acid (PCA), while highly effective as a scale inhibitor and dispersant, also presents several potential hazards that must be carefully managed during handling, storage, and disposal.
Because Phosphino-Carboxylic Acid (PCA) is a synthetic polymer containing both carboxylic acid and phosphino groups, it is generally considered low-toxicity in its fully formulated and diluted forms; however, concentrated solutions or dry powders can pose health risks if proper precautions are not observed.
Direct contact with Phosphino-Carboxylic Acid (PCA) can cause skin irritation, redness, or dermatitis, especially if exposure is prolonged, because the acidic nature of the polymer may disrupt the natural oils and barrier function of the skin.
Eye contact with Phosphino-Carboxylic Acid (PCA) solutions or dust may result in eye irritation, watering, or discomfort, requiring immediate rinsing with plenty of water to prevent more serious damage.
Inhalation of Phosphino-Carboxylic Acid (PCA) dust or aerosolized solutions can lead to respiratory irritation, coughing, or throat discomfort.
Chronic or repeated exposure to airborne particles in poorly ventilated areas may increase the risk of more significant respiratory issues, particularly in industrial environments where Phosphino-Carboxylic Acid (PCA) is handled in large quantities.
Workers handling concentrated Phosphino-Carboxylic Acid (PCA) solutions should therefore use personal protective equipment (PPE) such as gloves, goggles, and respiratory masks, and facilities should maintain adequate ventilation or localized exhaust systems to minimize airborne exposure.
