Phosphoric Acid

    • Product Name: Phosphoric Acid
    • Chemical Name (IUPAC): Orthophosphoric acid
    • CAS No.: 7664-38-2
    • Chemical Formula: H3PO4
    • Form/Physical State: Liquid
    • Factroy Site: No. 1417 Dianchi Road, Xishan District, Kunming City, Yunnan Province, China
    • Price Inquiry: sales3@ascent-chem.com
    • Manufacturer: Yunnan Yuntianhua Co., Ltd.
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    Specifications

    HS Code

    399691

    Chemicalname Phosphoric Acid
    Chemicalformula H3PO4
    Molarmass 97.99 g/mol
    Appearance Colorless, odorless, syrupy liquid
    Density 1.885 g/cm³ (85% solution)
    Meltingpoint 42.35 °C (108.23 °F)
    Boilingpoint 158 °C (316 °F)
    Solubilityinwater Miscible
    Ph 1.5 (1M solution)
    Casnumber 7664-38-2
    Vaporpressure 0.03 mmHg (20 °C)
    Acidityconstant Pka 2.12 (first dissociation)

    As an accredited Phosphoric Acid factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.

    Application of Phosphoric Acid

    Purity 85%: Phosphoric Acid 85% purity is used in food-grade additive processes, where it ensures consistent pH stabilization and improved preservative efficacy.

    Viscosity Grade: Phosphoric Acid low-viscosity grade is used in fertilizer production, where it enables efficient mixing and homogeneous nutrient distribution.

    Molecular Weight 98 g/mol: Phosphoric Acid with a molecular weight of 98 g/mol is used in rust removal formulations, where it provides optimal reactivity for metal surface cleaning.

    Stability Temperature 200°C: Phosphoric Acid with a stability temperature of 200°C is used in industrial cleaning agents, where it maintains chemical integrity during high-temperature processing.

    Particle Size <50 microns: Phosphoric Acid with a particle size below 50 microns is used in dental etching gels, where it provides uniform application and improved enamel preparation.

    Chloride Content <0.005%: Phosphoric Acid with chloride content less than 0.005% is used in electronics manufacturing, where it prevents corrosion and ensures high-purity processing.

    Color APHA <10: Phosphoric Acid with a color APHA value under 10 is used in beverage manufacturing, where it guarantees product clarity and prevents discoloration.

    Iron Content <0.002%: Phosphoric Acid with iron content less than 0.002% is used in pharmaceutical synthesis, where it minimizes contamination risk and supports high-purity compound production.

    Melting Point 42°C: Phosphoric Acid with a melting point of 42°C is used in specialty glass manufacturing, where it aids in controlled melting and consistent glass composition.

    Specific Gravity 1.7: Phosphoric Acid with specific gravity of 1.7 is used in water treatment plants, where it facilitates accurate metering and chemical dosing.

    Packing & Storage
    Packing Phosphoric Acid is packaged in a sealed, corrosion-resistant 25-liter HDPE drum with clear hazard labeling and secure, leakproof cap.
    Container Loading (20′ FCL) Phosphoric Acid is loaded in 20′ FCL containers using secure, corrosion-resistant drums or IBCs, ensuring safe, leak-proof transport.
    Shipping Phosphoric Acid should be shipped in tightly sealed, corrosion-resistant containers such as plastic or glass bottles, or lined drums. It must be labeled as corrosive and handled according to applicable regulations. During transport, containers should be secured upright to prevent leaks. Avoid exposure to heat, incompatible materials, and moisture.
    Storage Phosphoric acid should be stored in a cool, well-ventilated area away from sources of heat and incompatible substances such as strong bases and organic materials. Containers must be tightly closed, corrosion-resistant (preferably made of plastic or lined steel), and clearly labeled. Avoid moisture and direct sunlight. Suitable secondary containment is recommended to prevent leaks or spills from spreading.
    Shelf Life Phosphoric acid typically has an indefinite shelf life if stored properly in tightly sealed containers, away from moisture, heat, and contaminants.
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    More Introduction

    Phosphoric Acid: A Closer Look from the Manufacturer’s Point of View

    Phosphoric acid, a straightforward name that describes a product with deep roots in today’s industries, comes from a long chemical tradition. At our facility, we do not treat it as a mere commodity — its production calls for discipline, careful sourcing, and unbroken attention to every detail. We have been refining our methods for years, relying on direct handling of all process steps so we can vouch for every drum and every shipment.

    Model and Specifications Shaped by Direct Practice

    Our standard offering carries the designation 85% Food or Technical Grade. For concentrated work in fertilizer and industrial processing, we supply grades starting from 75% to 85%, keeping the water content in check without inviting unacceptable impurities. Rigorous filtration ensures a colorless, clear solution, which customers finish directly in a range of applications. Whether the task calls for bulk rail shipping or sealed drums, our onsite laboratories run titration and impurity checks at every stage.

    Compared to watered-down versions, our 85% grade minimizes excess water so customers get a higher yield per volume in the downstream process. Nondetectable levels for toxic heavy metals, like arsenic or lead, mark a crucial difference for beverage, syrup, and food manufacturers. Our constant push against cross-contamination means that food and non-food products do not share the same tanks or pipes.

    We achieve a tightly controlled density near 1.685 g/cm³ for technical and food-grade use, and deliver either colorless or only faintly tinted solutions with a low iron content. Test certificates, traceability documents, and real data from each batch are not afterthoughts but baselines here — we design our workflow so clients never have to chase paperwork or wonder what made it into their supply chain.

    What It Means in Real-World Use

    Demand for phosphoric acid stretches well past a single industry. Fertilizer producers rely on its phosphorus levels to feed their reactors, combining our acid with ammonia or potassium to create MAP, DAP, or NPK blends that drive global crop production. We keep hardness-forming metals out of our process by using corrosion-resistant reactors and strict feedstock checks, helping our clients run longer without scaling or short-lived reaction tanks.

    In beverage bottling, cola makers and canned drink plants count on clean, flavor-neutral input. Our food-grade acid fits this niche because it passes inspections for taste, odor, and acid number with no hangover of industrial chemicals. We keep separate tanks for this purpose and have earned a reputation for shipping product that supports product shelf life without leaving strange notes or visible haze behind.

    On metal surfaces, phosphoric acid never works alone — it etches, treats, or preps steel, turning flaky rust into stable iron phosphate. Crating a reliable, evenly prepped surface for paint and coating lines depends on acid that behaves predictably. Each specification we offer can be traced down to the source batch and tank, so automotive plants or manufacturers of metal appliances get a sharp, uniform result.

    Water treatment gives phosphoric acid another job: sequestering calcium and iron, reducing scale and deposit formation in pipes and cooling systems. Our acid ships in specialized containers to industrial plants, municipalities, and commercial chillers. Scale build-up halts production or eats up excessive energy; controlling mineral precipitation with a consistent, quality supply of phosphoric acid supports continuous, effective water management.

    Hands-On Experience with Quality and Safety

    We do not just post certificates or publish proof-of-origin numbers. In our plant, everyone from shift operators to chemists recognizes how easy it is for a small impurity to snowball into big problems. To defend against cross-contamination, we use separation at every level: piping, storage, and dedicated transfer lines. Oil residues, trace metals, organics — left unchecked, these turn up again in a syrup bottle or a fertilizer spreader. The only solution is unbroken vigilance, and that is the heart of our operation.

    Acid manufacture never offers shortcuts. We reject sub-par phosphate rock and vet every extraction batch before committing it to process. A major difference between grades shows up in testing — food-grade outputs must beat stricter rules, while technical grade finds a more forgiving audience among industrial buyers. Still, our ongoing focus remains on elimination: fewer impurities, lower color, tighter spec sheets. That starts at the tank farm and ends only at the customer’s door.

    Why Our Experience Matters Most

    You can buy phosphoric acid in almost any industrial market. As a manufacturer, we see the consequences when traders cut corners, dilute drums, or misrepresent grade. Once, a glass manufacturer suffered downtime after impurities reacted in their production line, because a mishandled batch from a third-party seller found its way into their tanks. We stepped in, ran backtrack tests, identified the origin, and worked side-by-side with their team to replace every affected container. We believe in transparency because the final customer never wants their own process to stop for someone else’s mistake.

    Manufacturing puts us closest to the process, letting us adjust not only the final product but also every input and every valve along the way. Forges, fabricators, bottlers, and processors return because we audit not just for paper quality — our on-floor chemists and plainspoken plant managers share the accountability of every shipped load. By watching each critical control point, we minimize the variance and error that can sneak into bulk chemical production.

    Phosphoric Acid Direct from the Source

    We draw our supplies from carefully chosen phosphate rock sources with established long-term reliability. Direct acidulation happens on-site, letting us manage the product’s pathway from rock to shipment. Process chemists stand by on each line; we do not depend on resellers’ assurances or vague origin stories. For the technical grade market, we routinely monitor for phosphate purity, sulfate content, calcium, magnesium, and metallic contaminants. A drum leaves the warehouse only if all markers stay in line with set limits, sometimes well below requirements.

    Large buyers, who might use thousands of tons a month for fertilizer or industrial formulation, rely on scheduled supply chains that cannot pause for sudden quality deviations. Our location by major logistics networks allows us to load railcars, ISO tanks, and road tankers as soon as the lab clears a lot. In this way, real supply chain security means hands-on oversight — not just a paper trail, but an actual line of sight from reactor to customer loading bay. We keep delivery steady, especially through periods of unexpected demand or global supply volatility.

    Usage Through a Practitioner’s Lens

    Customers do not want lectures about chemistry; they want phosphoric acid that works within their process tolerances. Fertilizer plants demand volume and speed: tanks must fill reliably, and each load needs sufficient phosphorus to support batch formulas. Drums that arrive out of spec force batch blending and error corrections that bleed money and time. By managing critical parameters ourselves, we insulate users from this risk.

    For beverage and food use, modern lines run at high speeds and need acid of consistently food-safe quality, or risk halting production for a single failed residue or sensory panel. Years spent troubleshooting bottling lines have taught us to look to the invisible: even a few parts per million of metallic impurity causes bottle haze and bad taste. Our food-grade acid undergoes final checks for taste and color, not just number-laden certificates.

    In water treatment, the feedback loop is immediate. Water system engineers running chillers or boilers call for acid deliveries that qualify for low residue and low calcium. An uncontrolled impurity brings hard water, poor heat transfer, and eventually, plant downtime. We take calls from operators who need not only the product, but troubleshooting guidance — direct from people who have logged years adjusting mineral controls, not shelf-bound consultants.

    Surface treatment shops need acid that will handle large volumes without leaving unpredictable iron stains or uneven phosphate layers. Unstable, off-grade acid creates more waste than help. We answer by providing strict batch control from mixing to shipping, and by holding documentation onsite for every order, so if trouble arises, we can go back to the beginning of the supply chain, not just the last truck that left the plant.

    How Our Product Stands Apart

    Experience separates reliable phosphoric acid from the kind that causes unexpected costs. Throughout years of manufacturing, we have learned that cheap acid often contains traces of unwanted substances that hurt downstream equipment, waste time, and harm end products. Parade-high purity numbers on a sheet do not matter if fines, filth, or off-odors sneak through the real pipeline.

    We believe in accountability at every layer. Our operators are trained for direct, consequence-rich work, not only to follow recipes but to observe, document, and test. Each tank, mixing pipe, and treatment line gets cleaned and inspected regularly. Problems appearing in food applications demand complete trace histories and have led us to refine digital records, allowing instant access not weeks or months later.

    Our technical approach avoids shortcuts. For example, we never swap technical for food-grade tanks, and cleaning lines between grades is a mandatory, not advisory, step. These habits come from years walking the floor, seeing firsthand how laziness in one batch ripples into repeated trouble for the customer. The difference, to us, is not a glossy brochure — it is a back-to-basics mindset where the chemical must be as clean on delivery day as it was on the test bench.

    Challenges That Shape Production

    Making phosphoric acid brings challenges nobody advertises on price sheets: corrosion, wear and tear, variation in raw rock, and unpredictable swings in demand push us to improve every year. Corrosive vapors eat away at less-than-optimal metal, so we invest in lined reactors and maintain them often, not just for regulatory boxes but because leaks and product contamination cost more than proper prevention. Access to consistently high-quality phosphorite avoids wild fluctuations in product purity — our purchasing teams look well past surface-level specifications to secure supply lines from trusted, well-studied quarries.

    Environmental requirements bring their own discipline. Scrubbing plant gases, capturing fugitive dust, and treating waste streams help us keep our plant community-friendly and maintain permits. Each ton of acid needs a matching plan for waste calcium sulfate (gypsum) and for spent process water. Cutting corners on byproducts might offer short-term savings, but in our experience, it only invites future compliance headaches and lost community trust.

    Factual Differences from Other Products

    Phosphoric acid finds itself compared to sulfuric and hydrochloric acid for industrial use. Each acid has its own character: sulfuric, strong and cheap, etches deeply but lacks selectivity and food-safe history. Hydrochloric acid, potent for pickling and cleaning, brings aggressive fumes and thins out in humid climates. Phosphoric stands apart with lower volatility, which lets workers handle it more safely in open tanks and minimizes corrosion risk in metal treatment. That makes it a preferred acidulant for food, beverage, and formulations where other acids cannot pass regulatory muster.

    In fertilizer production, no other acid offers the direct, straightforward supply of phosphate — the nutrient that greens the world. Our acid helps balance pH, deliver consistent phosphorus content to soils, and avoids the harsh plant burns and volatility that sulfate or chloride alternatives often cause. Chemical stability ensures storage tanks last longer, with fewer emergency flushes for unexpected scaling.

    Food safety rules do not regard all acidic chemicals the same. Many regulatory authorities approve phosphoric acid for direct food contact where sulfuric would never appear, especially in processing syrups, cheese, and other products needing low taste or scent profile. Compared to acids with powerful odors or complex reaction pathways, phosphoric delivers straightforward tang and solubility without complex aftertaste.

    Solutions to Ongoing Challenges

    To answer tightening quality demands, we have invested in more advanced analytical labs onsite. Real-time impurity checks — including ICP-MS scans, ion chromatography, and rapid spectrophotometry — mean each batch undergoes more cross-checks than older, once-a-day techniques allowed. Known plant bottlenecks led to the addition of more segregated lines and backup supply routes within the plant, reducing downtime during regulatory inspections or scheduled cleanings.

    Throughout our company, we have instituted direct supplier audits, flying our purchasing and technical teams straight to mines and processing facilities. Relationships built on years of shared standards give us leverage against short-lived quality slip-ups. Our experience with accidental cross-shipment episodes triggered new investments in automated tank level and valve locks, guarding against the rare but damaging risk of wrong-grade mixing.

    Automation in production, while never a panacea, helps limit human error, but real difference comes from daily discipline. Operators receive continuous training on chemical handling, impurity spotting, and emergency shutdown scenarios. For customers, we open our doors for audits, offering plant tours and on-the-floor quality demonstrations, proving that claims match reality in the spaces where acid is truly made, handled, and shipped.

    Looking Forward in the Supply Chain

    Over the years, phosphoric acid has become not just a chemical input, but a cornerstone for clients building supply chains that need speed, predictability, and flexibility. New directions in food and beverage flavors, cleaner fertilizers, and industrial water savings all turn to manufacturers like us for answers that only close process oversight can deliver. Rather than follow general trends, we respond directly to real industry feedback — product tweaks, shipment modifications, impurity targets — and turn those into practical adjustments.

    Clients no longer accept claims of generic quality or single-panel certificates. Traceability, delivery guarantees, and responsive service follow through not only from our sales desks but also from every loading dock and every process tank. As we upgrade and adjust our plant infrastructure year after year, the goal stays steady: acid that brings value in the ways that count, not just on paper, but in the uninterrupted realities of fertilizer, food, and industrial flow.

    We owe our reputation to the fact that, day in and day out, phosphoric acid remains more than a chemical — it’s a demanding test of systems, supply, and real human oversight. Our history as a manufacturer means we stake our name and work on every shipment, and that responsibility shapes everything we do, from the first drop to the last drum out the gate.