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HS Code |
561667 |
| Product Name | Disodium Salt of 1-Hydroxy Ethylidene-1,1-Diphosphonic Acid |
| Abbreviation | HEDP Na2 |
| Chemical Formula | C2H6Na2O7P2 |
| Molecular Weight | 250.05 g/mol |
| Appearance | Colorless to pale yellow transparent liquid or white powder |
| Solubility In Water | Completely soluble |
| Ph Value | 4.0 - 6.0 (1% solution) |
| Cas Number | 7414-83-7 |
| Melting Point | No definite melting point, decomposes on heating |
| Main Usage | Scale and corrosion inhibitor in water treatment |
| Density | Approx. 1.3 g/cm³ (20°C for solution) |
| Stability | Stable under normal conditions but incompatible with strong oxidizers |
| Odor | Odorless |
As an accredited Disodium Salt of 1-Hydroxy Ethylidene-1,1-Diphosphonic Acid factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | 25 kg net weight, white HDPE drum with tamper-evident seal, labeled "Disodium Salt of 1-Hydroxy Ethylidene-1,1-Diphosphonic Acid." |
| Shipping | The Disodium Salt of 1-Hydroxy Ethylidene-1,1-Diphosphonic Acid is securely packed in sealed, corrosion-resistant containers to prevent moisture ingress. Shipping is conducted according to applicable chemical transport regulations, with appropriate labeling and documentation. Packages are handled with care to minimize risks during transit and ensure safe delivery to the destination. |
| Storage | Store Disodium Salt of 1-Hydroxy Ethylidene-1,1-Diphosphonic Acid in a tightly sealed container in a cool, dry, and well-ventilated area, away from direct sunlight and incompatible materials such as strong oxidizers and acids. Protect from moisture and extreme temperatures. Ensure appropriate labeling, and keep the storage area equipped with spill containment facilities and suitable personal protective equipment for handling. |
Applications of Disodium Salt of 1-Hydroxy Ethylidene-1,1-Diphosphonic Acid in Industrial ManufacturingAs a direct manufacturer, we supply the disodium salt of 1-Hydroxy Ethylidene-1,1-Diphosphonic Acid to customers working in several highly regulated industrial sectors. The applications below detail real-world downstream scenarios, with specifications on compliance, dosage, process integration, and resulting finished goods within each sector. 1. Industrial Water Treatment for Scale ControlIndustrial operators select this diphosphonic acid derivative as a crystal growth inhibitor to address scale formation in recirculating and boiler water systems. Its ability to sequester metal ions and prevent calcium carbonate precipitation directly improves operational continuity in district heating plants, power station cooling towers, and closed-loop systems. Users dose the raw material into feedwater before heat exchangers or boilers, allowing for effective scale suppression under varying temperature and pH conditions. The downstream blending often requires integration with other conditioning agents and continuous in-line monitoring to fine-tune the ratio for protection without over-stabilizing hardness ions. Finished products are delivered as specialty antiscalant liquids or tablets, which maintain heat transfer efficiency in plant equipment throughout service intervals. Industry compliance standards
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2. Detergent and Cleaning Agent ManufacturingProducers in the industrial detergent sector incorporate this diphosphonic acid salt for its high-performance chelation of calcium and magnesium ions during wash cycles. The ingredient enables stable formulations in liquid, gel, and powder cleaners, which must remain effective in hard water conditions common in institutional or food industry environments. During blending, formulators add the chelant at the hydration or neutralization stage, allowing controlled interaction with surfactants, builders, and hydrotropes for consistent dispersibility and shelf-life stability. Finished detergents equipped with this chelating agent offer enhanced soil removal, minimized residue, and reduced maintenance on commercial washing equipment. Industry compliance standards
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3. Oilfield Scale Control ChemicalsOil and gas industry formulators rely on this raw material for injection into produced water systems and downhole environments where scale, particularly barium and strontium sulfate, threatens equipment integrity and flow assurance. Chemical engineers design antiscalant packages with customized ratios depending on brine composition and reservoir conditions, dosing the additive either continuously or in squeeze treatments. Downstream, the product demonstrates resistance to thermal degradation and maintains efficacy across fluctuating pressures and mixed ion content. Output formulations are marketed as downhole squeeze fluids or topside antiscalant packages for offshore and onshore operations, helping asset operators reduce unplanned shutdowns for scale remediation. Industry compliance standards
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4. Textile Processing and Dyeing AuxiliariesTextile processing plants use the disodium salt during scouring, bleaching, and dyeing operations to chelate interfering metal ions and enhance dye uptake uniformity. This additive prevents precipitation and color variation caused by calcium or iron compounds often present in process water or residual on fiber surfaces. Chemical dosing occurs in pretreatment baths and dye liquor stages, often coordinated with pH buffers and surfactant packages to assure precise control over process conditions. The approach results in textile end products displaying improved color vibrancy, lightfastness, and minimized spotting after washing and during garment life-cycle. Industry compliance standards
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5. Industrial Metal Surface Treatment (Electroplating and Cleaning)Manufacturers of metal parts integrate this phosphorus-containing diphosphonate in pickling and pre-treatment baths to prevent redeposition of dissolved metal ions and stabilize solution chemistry. In electroplating and metal cleaning, the material keeps iron, copper, and zinc ions in soluble form, minimizing surface staining and roughness. Process engineers introduce the chelant post-acid dosing, monitoring its interaction with bath pH and redox potential to maintain high throughput without introducing residues or impairing subsequent plating. The final application benefits include cleaner substrate finishes, consistent adhesion of plated layers, and reduced waste acid regeneration requirements. Industry compliance standards
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6. Paper and Pulp Processing ChemicalPulp and paper mills add this diphosphonic acid salt during the bleaching and wet-end chemistry stages to address scaling from hardness ions and control brightness loss from metal-catalyzed oxidations. Chemical feed occurs before or during peroxide or chlorine dioxide bleaching, with monitoring to fine-tune levels as equipment and pulp furnish characteristics shift between batches. This approach prevents scale deposits on high-value machinery and reduces yellowing during storage, supporting the production of high-brightness papers, specialty labels, and packaging grades with tight quality control. Industry compliance standards
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Competitive Disodium Salt of 1-Hydroxy Ethylidene-1,1-Diphosphonic Acid prices that fit your budget—flexible terms and customized quotes for every order.
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From the earliest days of manufacturing scale inhibitors, certain products have left their mark not because of marketing rhetoric but because they deliver day in and day out under harsh, variable, sometimes punishing process conditions. Disodium Salt of 1-Hydroxy Ethylidene-1,1-Diphosphonic Acid, known in our plant as HEDP•2Na (molecular formula C2H6Na2O7P2), belongs to this group. Our company has followed the evolution of phosphonate water treatment from niche chemical to global necessity. Every batch coming out of our reactors is built from a technical foundation measured in actual industrial performance—less theory, more feedback from customers who run boilers, chillers, process water loops, or oilfield water systems for a living.
The chemical structure of HEDP•2Na gives it the ability to sequester and stabilize metals such as calcium, magnesium, iron, and copper. In water treatment, this means that our product fights precipitation and keeps mineral scaling at bay where softer chelators or generic phosphates fail. Over the past decade, we have fine-tuned our synthetic process and purification steps to reduce byproducts that reduce shelf life or undermine performance. This focus on process chemistry matters most to end-users pressured to achieve reliable, predictable inhibition of scale and corrosion.
Most competing products target generic purity claims—our priority is batch-to-batch consistency. We achieve high active content by reacting phosphorus sources under tightly monitored temperature, pH, and oxidation conditions. Each run uses a proprietary filtration step that minimizes insoluble residues. We send out every lot only after it passes ICP and ion chromatography screening for trace heavy metals, since these can accelerate corrosion in many industrial settings. Typical product specs put the active acid content above 58%, with low free phosphorous acid and iron well below 10 ppm—a range validated by years of actual field support tickets and warranty claims.
When faced with high hardness or extreme pH fluctuation, off-the-shelf organophosphonates tend to drop out of solution or degrade. Facility operators working in steel micro-turbines, reverse osmosis plants, or municipal cooling towers have written us directly about disappointments with alternatives—scale crusting, under-deposit corrosion, plugged lines, and rising maintenance bills. In these feedback loops, our HEDP•2Na has demonstrated resistance to hydrolysis up to 250°C and in broad pH landscapes from acidic to alkaline.
In phosphonate chemistry, the power of 1-hydroxy ethylidene-1,1-diphosphonic acid as the core coordinating agent is matched by the sodium form’s stability and solubility. Mono- and tetra-sodium salts each offer different solubility curves and pH profiles; the disodium version fills a unique niche. Where the monosodium salt drifts acidic and the tetrasodium shifts alkaline, the disodium achieves a neutral-inclined solution profile, easing dosage control and allowing compatibility across varied system chemistries. This advantage has become a key driver for operators balancing corrosion and scale in mixed-metal, dynamic flow systems where pH, flow rate, and mineral loads change hour by hour.
Operators in textile dyeing, paper production, open and closed recirculating water cooling, or oil extraction don’t have patience for surfactant cocktails that promise everything and deliver little under scale pressure or oxidizer load. Our HEDP•2Na refuses to fall out as a sludge even in hard brine, and pays its keep by keeping exchangers cleaner and heat transfer steady. In feedback from field engineers at bottling plants and power stations, the product’s scale inhibition is mentioned more often than any other attribute, because it means one thing—downtime reduction, the factor that keeps maintenance budgets under control.
Chemical formulation never happens in isolation. Requirements set by local water chemistry, heat source configuration, waste stream restrictions, and even the reliability of plant monitoring equipment influence inhibitor choice. Our line foremen interact directly with OEM service groups unable to tolerate iron deposits or pitting. These conversations guide our quality assurance checks and inspire incremental process tweaks—such as fine-tuning the dissolution rate or refining chelation strength specifically for rough make-up water prone to calcium spikes. HEDP•2Na anchors multiple finished formulations, functioning both as primary scale inhibitor and as a supporting dispersant for materials like zinc, polyacrylates, or azoles.
Pilot-scale synthesis taught us some tough lessons—patchy yields, temperature swings, and contamination from trace metals forced a rethink of reactor lining materials and filtration techniques. Full-scale production lines emphasize exposure control, consistent pH titration, and fine monitoring of phosphorous and organic feeds. Process engineers run real-time spectrometer checks and HPLC to verify chain length and resistance to oxidation. The human factor—operator expertise, meticulous log-keeping, and gut sense built from years running batch after batch—shapes everything from process planning to crisis response if an impurity spike emerges.
This experience stands out most during troubleshooting for long-term clients who push equipment to the edge. A sugar mill running during the hottest weeks of monsoon season, or a plastics extruder at double shift, needs dependable supply and on-the-spot recommendations. We’ve matched dosages to everything from shallow cooling towers prone to rapid evaporation, to deep oilfield injection wells where carbonate scaling hits most products hard. Our HEDP•2Na serves as the backbone in these real-life applications, reducing cleaning cycles and saving system operators costly resource outlays.
There’s no shortage of scale inhibitors on the market—EDTA, DTPA, polycarboxylates, citrates, and multiple phosphonate derivatives crowd the shelves and bulk tanks of the chemical world. Chelating agents like citric acid or EDTA show decent results in ultra-pure, soft-water conditions but fall apart as scale-forming ions hit the thousands of ppm. While polyacrylates boast excellent dispersant abilities, they can’t hold onto iron or copper under stagnant conditions or when oxidizing biocides come into play. Other phosphonate salts, such as ATMP•Na or HEDP•4Na, either underperform at neutral pH or introduce pH drift, complicating routine process adjustments and risking permit violations for wastewater discharge.
In practical field conditions, our HEDP•2Na maintains a broad compatibility with oxidants, such as chlorine or bromide, and remains stable where chlorine dioxide or sodium hypochlorite are used. Polyphosphate inhibitors, despite occasional use for soft-scale control, face rapid hydrolysis, leading to reversion and loss of activity. Some operators tried hybrid blends promising “best of both worlds,” only to face costly shutdowns or post-dosage fouling from unstable byproducts—failures rarely captured in marketing pitches. Over the years, plant managers confirmed that switching to our tailored HEDP•2Na keeps service intervals predictable, water cycles longer, and heat exchange surfaces far cleaner than many generic alternatives.
Dosage optimization is always more than a numbers game. Every water circuit presents a different mix of impurities, flow rates, thermal loads, and system metallurgy. Operators in South Asian textile regions run into magnesium and silica fouling, unlike those in European pulp plants coping with different boiler feeds. We’ve worked alongside on-site chemists, tweaking trial dosages from 2 mg/L to 20 mg/L active content, depending on hardness spikes, water turnover, and biocide schedules.
Our experience underscored the importance of precise dosing systems. Manual injection led to wild swings in product use, sometimes twice the required dose, introducing cost and environmental risk. Integration with automated feed and bleed equipment—either through pulse or continuous injection—proved game-changing for plants striving for both efficiency and regulatory compliance. Decades of audits and troubleshooting revealed that long-term operational stability depends on consistent product purity, not simply maximum “actives” on paper. HEDP•2Na’s nearly neutral pH profile also eases maintenance and storage requirements, reducing corrosion worries for operators used to higher-alkalinity competitive products.
Modern industrial equipment relies on a blend of metals—steel, stainless steel, copper, nickel alloys—each presenting unique corrosion risks. The two-sodium format prevents both acidic attack and the excessive pH creep seen in strongly basic alternatives. This feature, often cited by field technicians, smooths integrations with copper corrosion inhibitors (like tolyltriazole) or with zinc co-dosing, which forms a powerful one-two punch against both scaling and general corrosion.
Water treatment options are wider than ever but getting the right blend, in the right system, at the right time often means learning from troubleshooting on the ground. Production of HEDP•2Na connects with formulators’ work, sometimes as a secondary dispersant for stabilized chlorine, sometimes as a backbone in zinc-polyphosphonate blends, sometimes as a star performer when raw water mineral loads outpace conventional sequestering agents.
Many plants face increasing scrutiny over wastewater discharge. Phosphonates get a share of attention for their role in aquatic ecosystems. For HEDP•2Na, the fate depends on treatment schemes, oxidation regime, and holding time before release. Our labs support downstream degradability testing, and we issue guidance to engineering teams balancing municipal regulatory caps with operational realities. Product application rates rarely approach thresholds that draw environmental action, given precise dosage control and routine checks on effluent chemistry.
In systems using high-oxidant regimes, HEDP•2Na offers better resistance to oxidative decomposition than some alternatives, with slower breakdown into orthophosphate. Our sales engineers review discharge monitoring data to identify potential cumulative effects—real-world oversight rather than recycling spec sheet assurances. We push for conservative dosing and monitor chemical oxygen demand, aligning product use with circular economic goals pressed by both local governments and global corporate standards. This commitment extends from design of low-residue manufacturing processes to on-site troubleshooting of plant-scale effluent monitoring equipment.
Developing an industry-standard product like HEDP•2Na means acting as a partner rather than a mere supplier. Production teams communicate openly with R&D and technical support staff. Customer feedback flows directly to process engineers refining synthetic procedures, qualifying new raw material sources, or working out logistics on all-weather shipping. Field trials, side-by-side tests against entrants in new geographies, and joint troubleshooting sessions shape batch documentation—a best-practices approach to chemical manufacturing that values bottom-line results over abstract purity targets.
Operators using our product share specifics about system load, seasonal swings, and new contaminants, fueling innovation in both process controls and documentation. For decades, this two-way communication helped us create a product not just for catalogues but built to solve the lived challenges of scale, corrosion, and discharge in heavy industry, from steel mills to geothermal pumps. Continuous process improvement, rooted in feedback mechanisms developed alongside longtime clients, stands as a key piece of our operational culture.
Each batch of HEDP•2Na comes with full traceability—not to satisfy a checklist, but because tracking raw material origin, operator log entries, intermediate analysis, and final QC results gives plant managers and end-users a reality check. When a client questions a stubborn scale patch, we match usage logs, track heavy-metal content, and compare dosage with in-house and independent water analysis labs.
With regulatory environments tightening and insurance demands increasing, traceability and transparency matter more every year. Third-party audits and ISO quality controls underscore our commitment to consistency, but the root value for clients lies in knowing that what they ordered last quarter and what they will receive next month will deliver the same, predictable results under the same process conditions.
Industrial water treatment never stops evolving. Raw water sources change, environmental permits shift, and system upgrades bring new metallurgy and flow profiles. HEDP•2Na continues to adapt. Our plants respond by adjusting synthesis to produce tighter molecular weight distributions or to remove trace contaminants found in new water sources. Field teams run pilot tests before large-scale conversion, minimizing risk of process interruptions and maximizing system compatibility.
Where customers propose blending with new polymers or alternate inhibitors, we support them with stability and compatibility checks. We offer updated data on antagonism or synergy with co-agents, based on experience with everything from high-iron feeds to novel reverse osmosis staging. For systems where the two-sodium version fits less conveniently, we sometimes recommend tetrasodium or blended phosphonate offerings—honoring the primary responsibility of supporting the right solution, not just moving inventory. We share data on chemical stability, material compatibility, and performance curve, but always build recommendations around each plant’s specific needs and operating experience.
HEDP•2Na’s journey from lab bench synthesis to backbone of modern-scale control programs shows the importance of manufacturing experience combined with open, honest customer support. Every change in the product—raw material source, reactor configuration, quality protocol—spins back through the lens of feedback from operating plants. By keeping the lines of communication open and responding with technical honesty, our manufacturing process remains anchored in what works, batch after batch, in real industrial water systems.
