Bis(hexamethylenetriaminepenta(methylenephosphonic acid)) BHMTPMPA BHMTP HPN CAS 34690-00-1

Tree Chem manufactures BHMTPMPA to support demanding water-treatment applications requiring high thermal stability and strong chelating performance. BHMTPMPA effectively complexes calcium ions, stabilizes dispersed solids, and controls multiple forms of inorganic scale. Its strong resistance to hydrolysis makes it suitable for high-temperature processes and prolonged circulation conditions.

This product appears as a deep amber liquid, with good solubility and excellent calcium-tolerance, making it suitable for formulation in multi-component water-treatment chemicals such as dispersants, anti-scalants, and corrosion inhibitors. For more details or purchasing inquiries, please contact info@cntreechem.com.

Specification

Basic Information

Technical Specification

Applications

Water Treatment Industry

• Bis(1,6-hexamethylene triamine penta(methylene phosphonic acid)) (BHMTPMPA) is primarily used as a chelating, scale-inhibiting and corrosion-inhibiting agent in industrial water treatment, especially where water hardness, alkalinity and temperature are all high. Its structure combines multiple phosphonic acid groups with a polyamine backbone, so in water it can dissociate into multiple ionic pairs and chelate two or more metal ions simultaneously, forming large, stable chelate structures. Through chelation, lattice distortion and dispersion, BHMTPMPA effectively prevents calcium carbonate, calcium sulfate and barium sulfate from crystallizing into hard, adherent scales on heat-exchange surfaces and pipe walls and at the same time forms a protective film on metal to slow electrochemical corrosion. This performance is maintained in a broad pH window (about 5–10) and at temperatures up to around 120 °C, making it suitable for severe industrial conditions.
• In industrial circulating cooling-water systems for power plants, chemical complexes, metallurgy and fertilizer production, BHMTPMPA is dosed as a core chelating scale inhibitor and corrosion inhibitor. Recirculation concentrates calcium and magnesium, raising scaling risk; continuous addition of 5–30 mg/L BHMTPMPA keeps Ca²⁺ and Mg²⁺ in solution, distorts crystal growth and disperses microcrystals so that scale remains loose and non-adherent. Field data show that at around 6 mg/L dosage, the limiting alkalinity can reach roughly 9–12 mmol/L while still avoiding heavy deposition, and the product maintains good performance from low to high hardness water. BHMTPMPA also shows strong corrosion-inhibition ability: in typical applications, 8 mg/L dosage has reduced carbon-steel pipeline corrosion rates from about 0.15 mm/a to 0.03 mm/a by forming a dense, adherent film on metal surfaces. It is compatible with polycarboxylate dispersants, zinc salts and other water-treatment agents, so composite formulations can exploit synergy between threshold inhibition, dispersion and passivation.
• In boiler-water treatment, BHMTPMPA is used to prevent high-temperature scaling and corrosion in steam drums, tubes and associated equipment. Calcium and magnesium salts precipitate readily under boiler conditions; BHMTPMPA chelates these ions and interferes with the nucleation and growth of carbonates and sulfates, thereby keeping internal metal surfaces clean and maintaining heat-transfer efficiency. Its good thermal stability at around 120 °C ensures that the molecule does not decompose rapidly in boiler environments, so its effect persists over long runs. When blended with polycarboxylate dispersants and zinc salts at appropriate ratios, BHMTPMPA provides combined scale inhibition, corrosion inhibition and particle dispersion tailored for medium- and low-pressure boiler systems.
• In oilfield water treatment, BHMTPMPA is applied in injection-water systems, fracturing fluids and produced-water handling where scaling and corrosion risks are severe. Formation and injection waters often contain high levels of Ca²⁺, Mg²⁺ and Ba²⁺; when mixed, these ions can form BaSO₄ and other low-solubility scales that plug pipes, perforations and near-wellbore formations. BHMTPMPA has strong salt tolerance and maintains high scale-inhibition efficiency in high-salinity environments, so dosages of 10–30 mg/L are used to keep pipelines and well strings free of hard scale. For waters rich in barium sulfate tendency, the product is often used together with HPMA, for example 15 mg/L BHMTPMPA plus 5 mg/L HPMA achieving scale-inhibition efficiencies above 95–98 %. In addition, BHMTPMPA’s film-forming and chelating functions help mitigate corrosion from aggressive gases such as H₂S and CO₂ in oilfield environments.
• Reverse-osmosis (RO) and other membrane systems constitute another important application field for BHMTPMPA as a membrane antiscalant. RO membranes are sensitive to carbonate, sulfate and metal-oxide deposition, which causes flux decline and pressure drop; BHMTPMPA’s low-phosphorus, strongly chelating structure allows it to control these scales without promoting biological fouling. It is compatible with common RO membrane materials and does not damage the membrane surface under correct dosage. In practical use, BHMTPMPA is often formulated with ATMP and PAPEMP into composite RO antiscalants in which BHMTPMPA provides high-efficiency chelation and threshold inhibition, ATMP contributes additional chelation under varying pH and PAPEMP enhances dispersion and other performance parameters. Such blends help maintain stable membrane flux, lengthen cleaning intervals and extend membrane service life in brackish-water, seawater and high-salinity wastewater-reuse systems.

Pulp and Paper Industry

• In the pulp and paper industry, BHMTPMPA is widely used across pulping, bleaching, papermaking and wastewater treatment as a chelating agent, dispersant, scale inhibitor and brightness stabilizer. Wood and recycled fibers bring iron, copper, manganese and other metals into the process; these metals catalyze peroxide decomposition, promote discoloration and contribute to scale and deposits. During pulping, addition of BHMTPMPA at 0.01–0.1 % on oven-dry pulp chelates these metal ions, reduces their catalytic activity and improves the efficiency and selectivity of chemical pulping reactions. This helps maintain higher pulp brightness, minimizes formation of dark complexes with phenolic groups and protects fiber integrity.
• In bleaching stages, especially hydrogen-peroxide bleaching, BHMTPMPA serves as an effective stabilizer by binding Fe³⁺, Mn²⁺ and similar ions that otherwise trigger uncontrolled peroxide decomposition. Typical dosage levels of about 0.05–0.2 % on dry pulp increase peroxide utilization, improve final brightness and reduce brightness reversion during storage. In papermaking, BHMTPMPA is used at around 0.01–0.05 % on dry pulp as a water-quality stabilizer in white-water loops and papermachine systems; it complexes hardness ions and trace metals that would otherwise deposit on headboxes, wires, felts and rolls, leading to spots, holes and other sheet defects. Its dispersing function keeps fines and fillers better distributed in the suspension, which improves sheet formation, opacity and strength while reducing downtime for cleaning. In paper-mill wastewater treatment, BHMTPMPA at 5–20 mg/L helps remove heavy-metal ions such as Cu, Zn and Pb through chelation and subsequent precipitation or filtration, and can enhance the biodegradability of organic pollutants, contributing to COD reduction.

Textile Printing and Dyeing Industry

• In textile printing and dyeing, BHMTPMPA is valued as a multifunctional chelating dispersant for pretreatment, dyeing, printing and finishing. During pretreatment steps such as desizing, scouring and bleaching, fabrics carry metal ions and various impurities that interfere with subsequent processing; BHMTPMPA at 0.5–2.0 g/L acts as a chelating dispersant that binds Ca²⁺, Mg²⁺ and transition metals and disperses oils and fine impurities into the bath. This improves desizing and scouring efficiency, enhances removal of metallic contaminants and provides a cleaner, more uniform substrate for bleaching and dyeing. In alkaline peroxide bleaching baths, BHMTPMPA added at 1–3 g/L stabilizes peroxide by sequestering catalytic metals, raising bleaching efficiency while reducing fiber damage and preventing yellowing.
• In the dyeing stage, BHMTPMPA is mainly used as a chelating dispersant and leveling auxiliary. Under hard-water conditions, reactive and other dyes may form insoluble complexes with calcium and magnesium, causing flocculation, uneven shade and reduced color yield; BHMTPMPMA at about 0.5–1.5 g/L complexes these ions, preventing dye coagulation and maintaining dye solubility. It also slows the rate of dye uptake to some extent, giving a leveling effect that helps produce uniform, high-quality shades and better fastness. In printing processes, BHMTPMPA is added at 0.2–1.0 % of the color paste as a chelating dispersant to stabilize printing pastes, prevent pigment or dye flocculation and maintain viscosity and flow. This results in clearer, sharper printed patterns and improved color brightness. In finishing processes, BHMTPMPA at 0.1–0.5 g/L acts as a metal-ion blocking agent and softener synergist, removing or masking residual metal ions that might cause spots or uneven handle, while enhancing the distribution and performance of softening agents on the fabric.

Metal Processing and Surface Treatment Industry

• In metal processing, BHMTPMPA is used as a chelating agent, scale inhibitor and corrosion inhibitor in metal cleaning, electroplating and surface-treatment processes. In acid cleaning of heat exchangers, pipelines and metal parts, typical formulations include 20 % sulfuric acid, about 1.0 % BHMTPMPA and a suitable surfactant, operated around 50 °C for 5–10 minutes. In such systems, BHMTPMPA chelates dissolved metal ions and scale constituents like Ca²⁺ and Fe³⁺, accelerating removal of water scale and rust while its film-forming tendency reduces base-metal attack. In alkaline cleaning, formulations with 10 % NaOH, 5 % Na₂CO₃, 2 % BHMTPMPA and 1 % surfactant at 60–80 °C are used to remove oils, oxides and inorganic deposits; BHMTPMPA provides chelation and dispersion, preventing re-deposition of scale and fine rust particles on the cleaned surface.
• In electroplating, BHMTPMPA is an important complexing agent and auxiliary for non-cyanide plating systems. In cyanide-free copper plating, baths containing 20–30 g/L copper sulfate and 50–100 g/L BHMTPMPA, adjusted to pH 9–10 with sodium hydroxide and operated at 20–40 °C, can form stable copper complexes that deposit as uniform, dense copper coatings with good brightness and coverage. In cyanide-free zinc plating, BHMTPMPA used at 20–50 g/L in baths with 20–40 g/L zinc sulfate at pH 5–6 and 15–35 °C yields bright, even zinc deposits. In phosphating processes, adding 0.5–2.0 g/L BHMTPMPA to zinc dihydrogen phosphate solutions (30–50 g/L) at 60–70 °C improves phosphate-crystal morphology, increases coating compactness and enhances corrosion resistance and paint adhesion. As a passivation additive, higher BHMTPMPA dosages of 2–5 g/L can help form protective films on stainless steel and aluminum alloys, further improving corrosion resistance.

Daily Chemical and Consumer Products Industry

• In the daily chemical sector, BHMTPMPA is incorporated into detergents, personal-care products and hair dyes as a chelating and stabilizing agent. In laundry detergents (powders and liquids), typical formulations contain 15–25 % surfactants (anionic and nonionic), 5–15 % builders and 0.1–0.5 % BHMTPMPA; the chelant softens hard water by binding Ca²⁺ and Mg²⁺, improves detergent efficiency and reduces scale formation on fabrics and washing-machine components. It also prevents trace metals from catalyzing decomposition of surfactants, optical brighteners and fragrances, thereby improving product stability and shelf life. In dishwashing liquids, formulas with 10–18 % surfactants and 0.1–0.3 % BHMTPMPA benefit from enhanced removal of limescale and metallic soils from tableware and less clouding or precipitation during storage.
• In skin-care products, BHMTPMPA is used at low levels as a metal-ion chelating agent to prevent discoloration, instability and rancidity caused by trace metals; it can also support antimicrobial systems by reducing metal-induced degradation of preservatives. In hair-dye formulations, BHMTPMPA at about 0.1–0.5 % acts as a stabilizer for oxidizing agents, slowing premature decomposition and helping to ensure that the desired oxidizing strength is available during the actual dyeing process. This leads to more predictable color-development behavior and better batch-to-batch consistency.

Electronics and Pharmaceutical Industries

• In the electronics industry, BHMTPMPA is used as an additive in electronic-component cleaning agents and in certain etching and CMP-related formulations. Electronic cleaning agents based on 60–80 % organic solvents such as ethanol or isopropanol, 5–10 % nonionic surfactants and 1–5 % BHMTPMPA are applied to remove oxides, ionic contamination and fine particulates from printed-circuit boards and other components. Here BHMTPMPA’s chelating function removes metal ions and oxide films, while its compatibility with surfactants and solvents supports high cleaning efficiency without excessive corrosion of fine circuitry. In etching baths, BHMTPMPA can help control metal-ion concentrations, stabilize etch rates and improve dimensional accuracy of etched features.
• In the pharmaceutical field, BHMTPMPA is described as both a pharmaceutical intermediate and a chelating excipient. As an intermediate, it participates in synthetic routes for certain active ingredients, particularly where polyphosphonate structures or chelating units are required. As a chelating agent in dosage forms, small amounts of BHMTPMPA (typically around 0.01–0.1 %) can be used to stabilize drug substances against metal-catalyzed degradation, improve solution stability and, in some cases, influence bioavailability by forming controlled complexes. Its strong and multi-site chelation properties make it suitable for specialized formulations where metal ions must be tightly controlled.

Other and Emerging Application Fields

• Beyond its established uses, BHMTPMPA is also applied in sectors such as electronics-grade water production, precision cleaning and emerging energy and marine applications. In high-purity water systems for electronics and fine chemicals, BHMTPMPA is used in small dosages to chelate trace metals, supporting the production of ultrapure water that meets stringent conductivity and contamination limits. In precision cleaning of electronic materials and assemblies, it appears in water-based cleaning systems where its chelating ability enhances removal of metal residues while maintaining compatibility with complex assemblies.
• In daily chemical and environmental applications, BHMTPMPA is part of chelating dispersant products designed to remove heavy metals from wastewater and to improve the performance of industrial cleaning and anti-scale treatments. Its good salt tolerance and dual scale-inhibition/corrosion-inhibition function also make it a candidate for cooling-water systems in new-energy installations such as solar thermal power and offshore platforms, where equipment is exposed to challenging water qualities and aggressive conditions. Across these diverse uses, the same core strengths—strong multi-site chelation, high calcium tolerance, good thermal stability and synergy with polymers and zinc salts—support BHMTPMPA’s role as a high-performance, multifunctional additive.

Storage & Handling

• Store in sealed plastic drums away from sunlight
• Avoid contact with oxidizing agents
• Keep in a cool, ventilated environment
• Ensure equipment grounding and avoid contamination

Usage Notice

• Wear protective gloves and goggles during handling
• Confirm compatibility before mixing with alkaline additives
• Avoid exposure to strong oxidizers
• Follow local chemical safety regulations
• In industrial circulating cooling-water systems with general water quality, BHMTPMPA is dosed alone at 5–30 mg/L as a chelating scale and corrosion inhibitor, achieving scale-inhibition efficiencies of 95 % or higher while protecting carbon-steel surfaces.
• For high-hardness circulating cooling water, a composite program uses 5–15 mg/L BHMTPMPA together with 2–4 mg/L zinc salt to combine strong scale inhibition with corrosion-inhibition rates above about 90 %.
• In high-temperature cooling systems, BHMTPMPMA at 3–10 mg/L blended with 2–5 mg/L HPMA is fed to control calcium sulfate and carbonate scaling and maintain stability at temperatures up to roughly 120 °C.
• For medium- and low-pressure boiler-water treatment, formulations containing 10–20 mg/L BHMTPMPA and 5–10 mg/L polycarboxylate dispersant are used to prevent internal boiler scale and inhibit corrosion.
• In oilfield injection-water systems, BHMTPMPA is dosed at 10–30 mg/L as a single scale inhibitor to prevent carbonate and sulfate precipitation in reinjection pipelines and downhole environments with scale-inhibition efficiencies above 95 %.
• For injection waters with high barium sulfate tendency, a composite program of 15 mg/L BHMTPMPA plus 5 mg/L HPMA is used to suppress BaSO₄ scaling, with reported inhibition efficiencies reaching or exceeding 98 %.
• In brackish-water reverse-osmosis systems, an antiscalant based on BHMTPMPA 5–10 %, ATMP 10–25 % and PAPEMP 0–10 % in deionized water is applied to maintain stable membrane flux and control carbonate and sulfate scales.
• In chemical pulping, BHMTPMPA is added at 0.01–0.1 % on oven-dry pulp as a chelating agent to bind Fe, Cu and Mn ions and improve pulp brightness and stability.
• In pulp bleaching, BHMTPMPA at 0.05–0.2 % on oven-dry pulp is used to stabilize hydrogen peroxide, prevent brightness reversion and protect fiber strength.
• In papermaking circuits, BHMTPMPA dosed at 0.01–0.05 % on oven-dry pulp stabilizes white-water quality, reduces inorganic deposits and improves sheet formation.
• In paper-mill wastewater treatment, BHMTPMPA at 5–20 mg/L is used to chelate heavy-metal ions such as copper, zinc and lead and to improve COD removal efficiency.
• In textile pretreatment processes such as desizing and scouring, BHMTPMPA is added at 0.5–2.0 g/L as a chelating dispersant to remove metal ions and disperse oils and impurities from fabrics.
• In reactive-dye dyeing baths, BHMTPMPA at 0.5–1.5 g/L complexes hardness ions, prevents dye aggregation and improves leveling and color uniformity on textiles.
• In printing color pastes, BHMTPMPA at 0.2–1.0 % of paste weight acts as a chelating dispersant to stabilize the paste, prevent flocculation and maintain pattern clarity and brightness.
• In textile finishing baths, BHMTPMPA added at 0.1–0.5 g/L functions as a metal-ion blocking agent and softener booster to prevent spots and enhance the softness effect on fabrics.
• In acidic metal cleaners, a typical formulation of 20 % sulfuric acid, 1.0 % BHMTPMPA and 0.5 % surfactant in water at about 50 °C for 5–10 minutes is used to remove scale and rust while controlling base-metal corrosion.
• In alkaline metal cleaners, a formula containing 10 % sodium hydroxide, 5 % sodium carbonate, 2.0 % BHMTPMPA and 1.0 % surfactant at 60–80 °C provides degreasing and descaling for steel and alloy parts.
• In cyanide-free copper plating, baths with 20–30 g/L copper sulfate and 50–100 g/L BHMTPMPA adjusted to pH 9–10 and operated at 20–40 °C deposit uniform, dense copper coatings with good brightness and coverage.
• In cyanide-free zinc plating, solutions containing 20–40 g/L zinc sulfate and 20–50 g/L BHMTPMPA at pH 5–6 and 15–35 °C yield bright, even zinc layers on steel substrates.
• In zinc phosphating treatments, baths comprising 30–50 g/L zinc dihydrogen phosphate and 0.5–2.0 g/L BHMTPMPA at 60–70 °C produce fine, compact phosphate coatings with improved corrosion resistance and paint adhesion.
• In liquid laundry detergents, formulations with 15–25 % surfactants, 5–15 % builders and 0.1–0.5 % BHMTPMPA are used to soften hard water, enhance cleaning performance and improve product stability.
• In dishwashing liquids, products formulated with 10–18 % surfactants and 0.1–0.3 % BHMTPMPA achieve better limescale removal from dishes and maintain clarity and stability during storage.
• In hair-dye products, oxidizing systems incorporating 0.1–0.5 % BHMTPMPA use the chelant as a stabilizer to slow premature oxidant decomposition and improve color-development consistency.
• In electronic-component cleaning agents, mixtures of 60–80 % organic solvent, 5–10 % nonionic surfactant and 1–5 % BHMTPMPA are applied to remove oxides and metal contamination while controlling corrosion of fine electronic structures.
• In pharmaceutical formulations, BHMTPMPA at about 0.01–0.1 % is used as a chelating excipient to stabilize active ingredients against metal-catalyzed degradation and to improve solution stability.

Packaging

• Plastic drum, 25 kg net each
• Packaging can be customized based on customer requirements