Hexamethylenebis(nitrilodimethylene)tetra-phosphonic Acid HDTMPA DEQUEST 2054 CAS 23605-74-5

Tree Chem manufactures HDTMPA CAS 23605-74-5 for customers requiring a high-performance phosphonate chelating agent with strong calcium tolerance and long-term stability in harsh industrial environments. HDTMPA provides effective chelation of Ca²⁺, Mg²⁺, Fe²⁺/Fe³⁺, and other metal ions, making it suitable for circulating cooling systems, chemical cleaning, and precision industrial formulations.

Supplied as a white crystalline powder, HDTMPA has exceptional hydrolysis resistance and oxidation stability, performing reliably in high-temperature and high-hardness systems. It is also used in composite phosphonate blends and high-end applications that require consistent purity and strong metal-ion control. For commercial cooperation or technical consultation, please contact info@cntreechem.com.

Спецификация

Основная информация

Технические характеристики

Приложения

Water Treatment Industry

• Hexamethylenediamine tetramethylene phosphonic acid (HDTMPA, HMDTMP) is a high-performance organophosphonate used mainly as a scale inhibitor and corrosion inhibitor in industrial water-treatment systems. Its molecule carries multiple –PO₃H₂ groups linked to a hexamethylenediamine backbone, allowing strong chelation with Ca²⁺, Mg²⁺ and other cations and the formation of dense protective films on metal surfaces. Because of this structure, HDTMPA shows outstanding inhibition of calcium carbonate, calcium sulfate, barium sulfate and iron-oxide scales and provides long-lasting corrosion protection on carbon steel and copper alloys, especially in harsh, high-temperature environments.
• In industrial circulating cooling-water systems for power, chemical, metallurgy and fertilizer plants, HDTMPA is dosed as a core scale inhibitor and corrosion inhibitor. It complexes Ca²⁺ and Mg²⁺ to prevent their combination with carbonate and sulfate ions, while adsorption on heat-exchanger surfaces produces a compact barrier film that slows electrochemical corrosion. Compared with other phosphonates, HDTMPA performs particularly well against CaSO₄ scale, combining high inhibition efficiency with long effective time and excellent temperature stability; it remains effective around 200 °C or higher, so it is very suitable for high-temperature heat-exchange and steam-generating systems where other phosphonates such as HEDP may decompose and lose performance. In practice, HDTMPA is rarely used alone; it is more often blended with polycarboxylate dispersants and zinc salts to obtain synergistic scale-control and corrosion-inhibition effects across a wide pH and hardness range.
• In boiler-water treatment, HDTMPA serves to keep internal surfaces free of hard deposits and corrosion over extended operating periods. By chelating hardness ions under high-temperature and high-pressure conditions, it prevents adhesion of boiler scale that would otherwise reduce heat-transfer efficiency and increase fuel consumption. At the same time, its film-forming action on steel reduces oxygen and electrochemical attack, thereby extending boiler life and lowering maintenance frequency. HDTMPA’s excellent thermal stability makes it especially attractive in high-temperature boiler systems where many organic agents hydrolyze or oxidize.
• Oilfield water treatment is one of the most important downstream sectors for HDTMPA, covering produced-water handling, injection-water conditioning, fracturing fluids and acidizing systems. In injection-water systems, HDTMPA controls carbonate and sulfate scaling when injection water rich in Ca²⁺/Mg²⁺ contacts formation water containing carbonate or sulfate anions, which could otherwise form scales and plug wellbores, perforations and pipelines. Its high temperature resistance and strong BaSO₄ inhibition make it particularly suitable for deep wells and high-salinity reservoirs. In fracturing fluids, HDTMPA is blended with polymeric dispersants to prevent scale deposition on proppant and downhole equipment, while in acidizing fluids it acts as a corrosion inhibitor and iron chelant, protecting tubulars and preventing secondary precipitation of iron salts during matrix or fracture acidizing.
• In reverse-osmosis (RO) systems, HDTMPA is used as a membrane antiscalant that suppresses deposition of CaCO₃, CaSO₄, BaSO₄ and metal oxides on RO membranes. Its low phosphorus content reduces the risk of biological fouling compared with high-phosphorus formulations, and its compatibility with polyamide membranes and oxidative biocides allows stable long-term operation. In high-salinity and high-sulfate cooling-water or RO systems, HDTMPA is combined with HPAA, HPMA, PASP and other dispersants in carefully designed blends to handle severe scaling tendencies, including barium sulfate and silica-associated fouling, while controlling corrosion under alkaline conditions.

Pulp and Paper Industry

• In the pulp and paper industry, HDTMPA is applied mainly as a metal-ion controller and scale/corrosion inhibitor in process-water and equipment circuits. During pulp preparation and stock handling, dissolved iron, manganese and other metals can affect pulp brightness, promote fiber degradation and create specks or discoloration in the final sheet. HDTMPA chelates these metal ions, reduces their catalytic activity and stabilizes bleaching systems, improving sheet appearance and long-term brightness stability.
• In paper-machine white-water and cooling circuits, HDTMPA prevents scale buildup and corrosion in pipes, heat exchangers, headboxes and forming sections. By inhibiting calcium and barium sulfate scale and controlling iron fouling, it helps maintain clean surfaces and steady heat-transfer performance, thereby reducing unplanned shutdowns and cleaning operations. HDTMPA’s dispersing effect keeps fine inorganic particles and corrosion products suspended, decreasing the risk of spot defects and improving overall paper quality and machine runnability.

Textile Printing and Dyeing Industry

• In textile printing and dyeing, HDTMPA functions as a chelating dispersant, water-quality stabilizer and peroxide stabilizer. In dyehouses, trace Fe³⁺, Cu²⁺ and hardness ions in process water can react with dyes to produce shade variation, color spots and poor fastness; HDTMPA binds these ions and prevents such side reactions. Its dispersing action helps maintain a uniform distribution of dyes in the dye bath, improving leveling and color vividness while reducing shade differences between batches.
• During peroxide bleaching of cotton and blends, HDTMPA is used as a stabilizer for hydrogen peroxide. By sequestering catalytic metal ions, it slows down uncontrolled decomposition of peroxide, ensuring that bleaching proceeds uniformly and completely across the fabric. This results in higher whiteness, fewer pinholes and smoother handle, while reducing peroxide consumption and fiber damage. In practice, HDTMPA is incorporated into refining and bleaching auxiliaries at defined concentrations to provide both chelation and dispersion, supporting consistent pretreatment quality for subsequent dyeing and finishing.

Metal Processing and Surface Treatment Industry

• In metal processing, HDTMPA is widely used as a component of metal cleaners, pickling auxiliaries and surface-treatment formulations. As a metal-cleaning agent, it is blended with inorganic or organic acids and surfactants to remove oxides, rust and water scale from steel and alloy surfaces. Its strong chelating ability accelerates dissolution of stubborn calcium sulfate and silicate scales and helps disperse solid residues, while relatively low corrosivity toward the base metal is maintained when inhibitor components are present. Typical formulations use HDTMPA alongside glycolic acid or other acids at moderate temperatures to achieve efficient cleaning with reduced acid dosage and lower risk of over-etching.
• HDTMPA also plays an important role as a complexing agent in cyanide-free electroplating baths. In alkaline copper plating, for example, HDTMPA complexes Cu²⁺ and other metal ions, controlling their deposition rate and enabling formation of uniform, compact and fine-grained metallic coatings. Compared with traditional cyanide chemistries, HDTMPA-based systems offer improved safety and environmental performance while maintaining or improving plating quality. In special-steel pickling solutions, HDTMPA contributes as a chelating and stabilizing additive in formulations containing polyamines, oxidants, detergents and other complexing agents, supporting controlled scale and oxide removal without excessive attack on the substrate.

Electronics Industry

• In the electronics industry, solid HDTMPA is produced at high purity and used in cleaning agents and surface-treatment formulations for electronic components. It effectively removes metal contaminants from sensitive surfaces while controlling corrosion of conductive patterns and metallic contacts. For high-precision devices, its strong metal-chelating ability and low residue help improve component reliability and long-term stability.
• HDTMPA can also be included in semiconductor chemical-mechanical polishing (CMP) slurries and related formulations as a chelating and pH-regulating component. By coordinating metal ions generated during polishing, HDTMPA helps prevent redeposition and particle agglomeration, stabilizes slurry performance and contributes to smoother, defect-free wafer surfaces. In advanced electronic cleaning systems, HDTMPA-based formulations are tailored to balance cleaning strength, material compatibility and ultra-low ion residue requirements.

Daily Chemical and Detergent Industry

• In daily chemical products, HDTMPA is used as a chelating agent and stabilizer in detergents, cleaners and certain personal-care products. In industrial and household detergents, it softens hard water by binding Ca²⁺ and Mg²⁺, enhances the detergency of surfactant systems and prevents precipitation of insoluble salts that would otherwise cause product instability or residues on washed surfaces. It is particularly useful in low- or non-phosphate formulations, where HDTMPA combined with sodium citrate or other builders helps achieve good washing performance while meeting environmental regulations.
• HDTMPA is also used as a stabilizer in bleach-containing products such as hair dyes and bleaching agents, where it prevents premature decomposition of peroxides and maintains product performance over storage. In liquid soaps, shampoos and body washes, low levels of HDTMPA help control metal ions that could otherwise trigger discoloration, viscosity changes or loss of fragrance. In these formulations, typical dosages are in the 0.1–0.5% range, carefully balanced with other chelants and surfactants to deliver both product stability and end-use cleaning performance.

Other Industrial and Construction Applications

• Beyond the sectors above, HDTMPA is used in specialized construction and materials applications. In concrete admixtures, it can be applied to delay setting time, improve workability and enhance resistance to water penetration and chemical attack by chelating deleterious ions and modifying the microstructure of hardened concrete. In high-sulfate or chloride environments, such admixtures help extend the service life of reinforced structures by mitigating corrosion-promoting processes.
• HDTMPA is also discussed as a key component in composite water-treatment products designed for high-chloride, high-sulfate and other harsh environments. Its combination of excellent CaSO₄ inhibition, high-temperature stability, broad pH stability and strong synergy with polycarboxylates and zinc salts positions it as a central building block for next-generation, high-performance, environmentally oriented water-treatment formulations.

Хранение и обработка

• Store in sealed composite woven bags or export-compliant packaging.
• Keep away from moisture, oxidizing substances, and direct sunlight.
• Maintain cool, dry, well-ventilated conditions.
• Use protective gloves and goggles during handling.
• Ensure grounding during transfer to prevent static accumulation.

Уведомление об использовании

• Avoid inhalation of dust; use protective masks.
• Test compatibility before mixing with other additives.
• Keep packaging sealed to prevent moisture absorption.
• Follow local regulations for storage and transport.
• General circulating cooling-water program: HDTMPA is dosed at 15 mg/L when used mainly as a scale inhibitor or at 64 mg/L when corrosion inhibition is primary to control CaCO₃, CaSO₄, BaSO₄ and iron-oxide scales while protecting carbon steel.
• Cooling-water composite with zinc: a blend of HDTMPA 10–20 mg/L and zinc salt 2–4 mg/L is fed into industrial cooling loops, with zinc dosage adjusted to free-chlorine level to enhance corrosion inhibition in alkaline systems.
• Sulfur-containing circulating cooling-water inhibitor: a patented composite uses a ZnCl₂:HDTMPA:HPAA:acrylic–acrylamide–AMPS copolymer:urotropine weight ratio of 1:1.5:1.5:11:130 at a total dosage of 300–500 mg/L and pH 8–9 to achieve a corrosion rate of 0.177 mm/a and scale inhibition efficiency of 83.5%.
• High-temperature circulating-water inhibitor: a formulation containing 60% HDTMPA, 30% HPMA and 10% zinc salt provides synergistic scale and corrosion inhibition in circulating-water systems operating up to about 150 °C.
• High-salinity circulating-water inhibitor: a composite of 50% HDTMPA, 30% PASP and 20% nonionic surfactant is used to prevent barium sulfate scale and colloidal particle deposition in high-salt cooling-water circuits.
• RO antiscalant for high-silica systems: HDTMPA combined with polyacrylic acid is formulated as a reverse-osmosis antiscalant that controls carbonate, sulfate and silica-related scaling while minimizing biofouling risk.
• Oilfield injection-water treatment: HDTMPA is applied at 10–30 mg/L as a single agent or in a 3:1 mass ratio with HPMA to prevent scale formation in oilfield reinjection lines and downhole environments.
• Oilfield fracturing-fluid additive: HDTMPA at 15–50 mg/L blended 1:1 with PESA is added to fracturing fluids to enhance dispersion and inhibit barium and calcium sulfate scale on proppant and tubulars.
• Oilfield acidizing fluid: HDTMPA is used at 0.1–0.5% in acidizing solutions to chelate Fe³⁺, prevent secondary iron-salt precipitation and reduce corrosion of downhole tubing and equipment.
• Glycolic-acid metal-cleaning formulation: a metal cleaner composed of 5–10% glycolic acid, 1–3% HDTMPA and optional surfactants, operated at 40–60 °C, is used to remove stubborn water scale and rust from heat exchangers and process equipment.
• Special-steel pickling solution: a pickling bath for special steels contains 5–9 parts diethylenetriamine, 12–18 parts complexing reducer, 20–24 parts detergent, 7–9 parts HDTMPA or amino triacetic acid, 7–12 parts potassium or sodium chlorate and 32–49 parts tap water to achieve controlled oxide removal.
• Alkaline degreasing agent: an alkaline degreaser is formulated with 25 parts NaOH or 10 parts Na₂CO₃ or 40 parts Ca(OH)₂ or 35 parts NaHCO₃ as alkali, 22 parts sodium phosphate or 10 parts STPP or 30 parts sodium silicate or 25 parts metasilicate as builder, 5 parts HDTMPA as chelating agent and selected anionic or nonionic surfactants as emulsifiers.
• Liquid detergent base formula: a liquid detergent contains 15–30% surfactants such as 15% sodium linear alkylbenzene sulfonate and 10% fatty-alcohol ethoxylate, 5–20% builders such as 5–10% STPP and 3–8% 4A zeolite, 0.1–0.5% HDTMPA as chelant, 3–5% propylene glycol as solvent, appropriate fragrance and preservative and the balance deionized water.
• Phosphate-free laundry liquid: a phosphorus-free laundry liquid uses 0.1–0.5% HDTMPA together with suitable sodium citrate levels and an anionic–nonionic surfactant system at a 3:1 ratio to achieve good detergency and environmental performance.
• Industrial cleaning agent with HDTMPA·4Na: an industrial cleaner incorporates 0.5–5% HDTMPA·4Na, with 0.5–2% for general oil and scale removal and 2–5% for heavy-duty hard-surface deposits, combined with surfactants and solvents to deliver strong cleaning power.
• Concrete admixture concept: HDTMPA is dosed according to performance requirements as a concrete admixture that delays setting, improves workability and enhances impermeability and corrosion resistance of reinforced structures in aggressive environments.

Упаковка

• 25 kg composite woven bag
• Packaging that meets export environmental requirements
• Custom packaging available upon request