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HS Code |
631042 |
| chemical_name | Fluorophosphoric Acid [Anhydrous] |
| molecular_formula | H2PO3F |
| molar_mass | 100.00 g/mol |
| appearance | Colorless, hygroscopic liquid or crystalline solid |
| density | 1.685 g/cm3 (liquid, 25°C) |
| melting_point | 27 °C |
| boiling_point | 200 °C (decomposes) |
| solubility_in_water | Reacts with water; highly soluble |
| pH | 1 (very acidic, in aqueous solution) |
| CAS_number | 13593-97-6 |
| UN_number | 3264 |
| odor | Pungent, irritating |
| hazard_class | Corrosive, Toxic |
| stability | Decomposes on exposure to moisture |
As an accredited Fluorophosphoric Acid [Anhydrous] factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Brown glass bottle containing 500 mL of Fluorophosphoric Acid (Anhydrous), tightly sealed, hazard-labeled, with detailed handling instructions. |
| Shipping | Fluorophosphoric Acid [Anhydrous] must be shipped in tightly sealed, corrosion-resistant containers, clearly labeled as toxic and corrosive. Transport requires compliance with hazardous material regulations (e.g., DOT, IATA); it should be protected from moisture and physical damage, and handled by trained personnel using appropriate personal protective equipment (PPE) due to its highly reactive nature. |
| Storage | Fluorophosphoric Acid [Anhydrous] should be stored in tightly closed, corrosion-resistant containers, away from moisture and incompatible substances such as strong bases and organic materials. Store in a cool, dry, well-ventilated area designed for corrosive chemicals. Clearly label storage areas and containers. Avoid exposure to heat and direct sunlight. Use secondary containment to prevent leaks or spills. |
Applications of Fluorophosphoric Acid [Anhydrous] in Industrial ManufacturingOur manufacturing expertise ensures the consistent quality of anhydrous fluorophosphoric acid, supporting critical applications in established industrial sectors that require high reactivity, controlled purity, and proven downstream integration. Below, we detail primary application fields where this raw material plays an irreplaceable role, with a focus on practical parameters that matter most in real-world production environments. 1. Surface Treatment for High-Performance Metal AlloysSpecialty metal finishing plants, particularly in aerospace and defense, deploy fluorophosphoric acid anhydrous for forming fluoride-phosphate conversion layers on high-nickel, titanium, and aluminum alloy components prior to further machining or coating. This process increases material resistance to pitting and intergranular corrosion under extreme operating conditions and enhances paint adhesion, especially where strong mechanical and chemical bonds are required. Manufacturers specify strict acid purity grades to ensure repeatable surface morphology and avoid embrittlement or contamination, and adapt concentrations to part geometry and alloy composition. Industry compliance standards
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2. Microelectronic and Semiconductor EtchingWafer fabrication and printed circuit board manufacturing integrate anhydrous fluorophosphoric acid in advanced selective etching processes, where it provides fine control over oxide layer removal from silicon and certain compound semiconductors. Its use supports minimal undercutting and sharp line definition at micron and sub-micron scales, directly affecting device yield and functional quality. Equipment cleaning and circuit patterning steps utilize this acid in closely monitored cleanroom settings where metallic ion contamination, water introduction, and etch rate uniformity must meet exacting specifications. Process engineers alter acid concentration and temperature to match each specific photolithography cycle and substrate material. Industry compliance standards
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3. Electrolyte Additive in Specialty Electrochemical CellsProducers of primary lithium and high-voltage battery systems employ anhydrous fluorophosphoric acid as a functional additive in electrolyte formulations designed to improve the stability of the solid electrolyte interphase (SEI) on electrode surfaces. Its precise dosing supports increased cycle life and suppressed dendrite formation by altering ionic conductivity and breakdown voltages of the electrolyte mix. Battery engineers select this material for systems operating at extreme currents or in high-temperature applications, using carefully calibrated introduction techniques to control moisture and prevent unwanted reactions with other cell components. Industry compliance standards
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4. Synthesis of Phosphate-Based Pharmaceutical IntermediatesAPIs and pharmaceutical intermediates manufacturers incorporate anhydrous fluorophosphoric acid in multi-stage syntheses of select organophosphate drugs and diagnostic reagents, particularly where selective fluorination or enhanced phosphorus reactivity yields improved biological performance or downstream processability. Controlled reactor addition limits exothermic side reactions during key coupling or halogen exchange steps, and multi-batch analytical QC tracks residual acid and fluoride to ensure batch-to-batch reproducibility and meet regional regulatory limits on impurities. Industry compliance standards
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5. Glass Fibre and Specialty Glass Polishing OperationsManufacturers of high-silica glass fiber and optical glass products utilize anhydrous fluorophosphoric acid for controlled surface etching and polishing during final finishing steps, removing micro-defects and surface striae without introducing sodium or other alkali impurities. Its low water content and aggressive fluoride reactivity minimize residual stress on drawn fibers and flat substrates, preserving mechanical integrity and transmission properties critical for fiber optic and specialty glass applications. Quality auditors monitor acid purity and residue content to maintain compliance with industry-required optical performance and durability specimens. Industry compliance standards
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Experience in chemical manufacturing provides a different lens for looking at raw materials. Among the inorganic acids manufactured at scale, anhydrous fluorophosphoric acid occupies a unique place both in terms of its performance profile and its critical role as a building block in advanced industries. For those of us who have spent years perfecting its synthesis, handling, and quality assurance protocols, this compound tells a story of precision chemistry and practical utility working together.
Years on the shop floor show that obtaining truly anhydrous fluorophosphoric acid means controlling water content down to the very last fraction. Sourced and processed without shortcuts, quality material presents as a colorless to slightly yellow, dense, fumes-on-contact liquid. The difference between a reliable product and an inconsistent blend starts with strict adherence to real purity measurements—keeping water below 0.05% and batch trace impurities like sulfate, chloride, and iron in the low mg/kg range.
From a manufacturer's perspective, the challenge involves both feedstock control and reactor construction. Glass-lined or specially alloyed reactors, high-vacuum dehydration under carefully regulated temperatures, and ongoing on-stream analytics allow us to repeatedly reach the published purity specifications year after year. This consistency pays off most during complex downstream applications, where side-reactions and stability concern our partners and clients.
Our operation runs to a standard driven by R&D feedback, not only a published model number. In-house, we track batches by production lot and record purity metrics through ICP-OES, Karl Fischer titration, and wet chemistry for halide and iron. The common model for anhydrous fluorophosphoric acid in industrial settings hovers at 98–99% main substance. The remaining content must be very closely analyzed to avoid corrosion or catalyst poisoning in high-value chemical synthesis.
Packaging volumes address both safety and efficiency. Metal or polymer drums rated for high chemical compatibility prevent moisture ingress and retain the anhydrous state. While market habits may lean toward 25-liter, 50-liter, and 200-liter containers, our priority lies in making sure each drum resists internal corrosion and preserves product identity until point of use.
Within the manufacturing environment, seeing the raw acid circulate through various stages highlights its practical value. Anhydrous fluorophosphoric acid serves as much more than a laboratory reagent; its most notable industrial roles fall in the areas of surface treatment, catalyst activation or regeneration, electrolyte systems, and advanced synthesis for specialty phosphorus compounds.
In aluminum finishing, for example, its role is nearly irreplaceable. Etching and brightening baths rely on the specific reactivity and water exclusion property of the acid to achieve the desired microstructure transformation and gloss level in architectural profiles or components. Some lines stepping up to aerospace specification grades have learned the hard way about the cost of fluctuating purity their processes become impossible to control.
Electronics manufacturing extracts even greater value from pure anhydrous fluorophosphoric acid. In semiconductor wet processes and specialty glass fabrication, users demand near-zero water content, since hydrolyzed impurities lead to residual surface defects and device instability. When competing on the world market, substandard acid can push entire product lots below operational parameters, with economic losses sometimes traced back to a single contaminated delivery. Our experience with closed material transfer and air-exclusion handling methods responds directly to these exacting demands.
The distinction between anhydrous and other grades becomes easy to appreciate onsite. Even a 1% water content shift triggers differences in acid activity, bulk density, and fume rate. For those following process safety management, the lower water content also shifts the hazard profile: as the reactivity toward most metals and organic matter intensifies, the containment and response protocols adapt as well.
Technical-grade fluorophosphoric acids, sometimes offered in the 75–85% range with balance as water and trace metal salts, work for less demanding applications where corrosion concerns are limited or batch variability is acceptable. Still, many times over the years, we have been asked to troubleshoot downstream failures that stemmed from compromised acid—scale build-up, inconsistent pH control, or catalyst poisoning. Outcomes improve immediately after switching to consistently anhydrous material.
Process chemists and plant engineers do not order our acid for theoretical specifications. Instead, decades of field experience have shown that failures in etching, precipitation, or alloy bath control often track back to fluctuating acid quality or lapses in water exclusion. Only by starting with guaranteed-low-water content for each batch can facilities run close to stoichiometric targets and minimize costly downtime or rework.
Weeding out excess water and trace contaminants is as much an operations discipline as a lab one. Ambient air and drum seals both challenge product integrity every step outside the reactor. Multiple layers of packaging validation—periodic pressure checks, sample reanalysis before shipping, rotating inventory—manage the risk for our industrial users. No shortcut or substitute matches the benefits of using the true anhydrous product when performance and reliability matter most.
Manufacturing and shipping this acid never becomes routine. The fume emitted on exposure to air rapidly hydrolyzes into corrosive vapors, including hydrogen fluoride, which introduces specific risks for both worker safety and the environment. All personnel wear UHD-rated gloves and full-face respirators, and process lines feature double-walled transport with positive nitrogen purge to protect both product and personnel. These steps come not from regulatory minimums but from years of refining our own best practices as near-miss incidents have shaped both training and facility design.
Disposal and spill response planning grow out of experience, too. Using neutralization systems with defined chemical dosing and contained runoff allows us to manage the risk of unplanned releases and maintain compliance with environmental authorities at the local and national level. Our engagement with regulatory updates reflects a recognition that community and workforce health relies on a full-circle understanding of the materials under our care, not a checkbox approach to compliance.
Beyond basic etching and surface treatment, our anhydrous fluorophosphoric acid finds utility in fields that prize chemical selectivity. In battery-grade lithium salt production, small changes in feedstock make big differences in yield and purity. Collaborations with cathode material suppliers have illustrated how trace moisture can compromise batch consistency, so every lot delivered gets tailored handling instructions based on the end-user’s application.
Specialty glassmakers, phosphate ester producers, and certain catalyst manufacturers within fluorochemical sectors return year after year for the acid’s reliability. Their processes call for sharp batch reproducibility and minimized plant downtime, which only comes from the assurance that the raw material always conforms to detailed analytical checklists. As a manufacturer, we maintain open communications with process engineers and technical managers at these facilities, sharing both our test results and feedback loops from their lines. This partnership approach keeps all parties current on the required minimums—and the small tweaks that can separate a pass from a fail in high-stakes production.
Collaborative research and pilot line support also form a substantial part of our offering. Over time, we have helped industrial partners adjust acid handling systems, retrofit storage with improved moisture barriers, and implement nitrogen-flooded feed arrays to maximize shelf life and performance. We take pride in mutual problem solving, connecting practical know-how from our line workers all the way up to PhD-level process chemists within customer facilities.
As new sectors emerge—lithium batteries, flame-retardant additives, inorganic flame retardant resins, fluorinated pharmaceuticals—the demand for high-purity, single-source anhydrous acid continues to grow. Observing this from the manufacturing floor, a few realities become clear. Scale-up cannot cut corners; every ton of product requires validated raw materials, redundant monitoring, and QA oversight at every hand-off. Our internal culture rewards foresight and attention to operational detail rather than just throughput, which protects client production schedules downstream and sustains process reputation across global markets.
The shift toward digitalization and real-time quality control in specialty chemical manufacturing has affected our daily routines as well. Inline sensors, barcode traceability, and batch genealogy tracking enable us to guarantee lot-specific traceability for all acid shipped. With greater end-user demand for detailed certificates of analysis and digital documentation, our approach evolves to stay one step ahead of regulatory and customer requirements.
Not every challenge stems from chemistry alone—supply chain disruptions and transportation bottlenecks have tested even the largest manufacturers over the last decade. In response, we have learned to build buffer stocks, select multiple qualified raw material sources, and invest in redundancies across critical utility infrastructure. Supply reliability depends on more than shipment schedules. Only by owning the process root to leaf—starting at raw input validation, progressing through high-purity synthesis, and finishing with responsive logistics—does a manufacturer truly safeguard its reputation in the specialty chemical sector.
Batch failure, while rare, still happens and provides lessons for all involved. Every time we lose a lot to an unexpected contaminant or equipment anomaly, the event gets a forensic-level review. Data from these post-mortems funnels directly into our training, maintenance schedules, and raw material screening. It is not enough to issue apologies or replace defective product—a responsible manufacturer strives to eliminate recurrence and improve transparency for buyers and their own operators.
Working with hydrofluoric and phosphorus chemistry for over a generation highlights the need to keep updating processes and people. Training does not stop at compliance. Each new hire at our facility goes through hands-on sessions led by those who have managed both routine batches and out-of-spec emergencies. Knowledge transfer helps maintain institutional wisdom that no procedure manual can match. Ongoing engagement with university partners and sector training bodies helps keep us sharp and adaptable as international standards evolve.
Addressing environmental and sustainability concerns remains at the center of our long-term plans. Reactor vent gas scrubbers and advanced wastewater treatment systems now feature in all new capital investments. Closing the loop on fluorine and phosphorus recovery has begun shifting our operations toward greater resource efficiency, both for regulatory reasons and to meet growing client interest in green chemistry. These changes have altered our daily routines—but directly improve plant safety, long-term viability, and our standing in the global supply community.
From synthesis through to handling, real-world limitations and opportunities come into clearer focus from a manufacturer’s perspective than from technical literature alone. Producing anhydrous fluorophosphoric acid to exacting standards, year after year, builds a foundation of expertise not easily replicated at other points in the value chain. Every liter represents the accumulated care, vigilance, and innovation of a working team with decades of shared history, responsive to both shifts in industrial demand and feedback from those who depend on absolute reliability.
By marrying hands-on experience with technical rigor, direct manufacturers do more than supply a product—they become partners in their clients’ long-term production success. Recognizing and addressing the unique challenges inherent to anhydrous fluorophosphoric acid allows us not just to respond to the present market but to help shape the future direction of specialty phosphorus and fluorine chemistry.