|
HS Code |
511645 |
| Chemical Name | Potassium Sulfate |
| Chemical Formula | K2SO4 |
| Molar Mass | 174.26 g/mol |
| Appearance | white crystalline solid |
| Solubility In Water | 111 g/L (20°C) |
| Melting Point | 1069°C |
| Density | 2.66 g/cm³ |
| Odor | odorless |
| Cas Number | 7778-80-5 |
| Ph Of 1 Percent Solution | 6.5 - 7.5 |
| Boiling Point | Decomposes |
| Common Uses | fertilizer, laboratory reagent, manufacturing alum |
As an accredited Potassium Sulfate factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | White laminated 25 kg bag, labeled "Potassium Sulfate, K₂SO₄," featuring hazard symbols and handling instructions, securely sealed for transport. |
| Container Loading (20′ FCL) | Container Loading (20′ FCL) for Potassium Sulfate: Typically 25-27 metric tons packed in 25/50kg bags, loaded safely within a 20-foot container. |
| Shipping | Potassium Sulfate is shipped in tightly sealed, moisture-resistant bags or drums, typically made of polyethylene-lined paper or plastic. It should be stored in a cool, dry, well-ventilated area away from incompatible substances. Proper labeling and handling procedures are required to prevent spills and exposure during transportation and storage. |
| Storage | Potassium sulfate should be stored in a cool, dry, and well-ventilated area, away from moisture and incompatible substances like strong acids. Keep the container tightly closed and properly labeled. Store it away from heat sources and direct sunlight. Ensure that the storage area prevents accidental release into the environment and is equipped with appropriate spill containment measures. |
| Shelf Life | Potassium sulfate has an indefinite shelf life if stored in a cool, dry, and well-sealed container, away from moisture. |
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Purity 99%: Potassium Sulfate with 99% purity is used in fertilizer blending, where it provides high potassium content without chloride contamination. Granular Form: Potassium Sulfate granular is used in broadcast fertilization, where it ensures even nutrient distribution and efficient nutrient uptake. Water Solubility 110 g/L (20°C): Potassium Sulfate with high water solubility is used in fertigation systems, where it enables rapid dissolution and uniform application. Low Heavy Metal Content: Potassium Sulfate low in heavy metals is used in specialty crop cultivation, where it minimizes risk of soil and plant contamination. Particle Size 1–2 mm: Potassium Sulfate of 1–2 mm particle size is used in precision agriculture, where it improves flowability and reduces dust during application. Melting Point 1,069°C: Potassium Sulfate with a melting point of 1,069°C is used in industrial glass manufacturing, where it acts as a stable fluxing agent. Moisture Content <0.5%: Potassium Sulfate with low moisture content is used in storage and bulk handling, where it prevents caking and ensures product stability. Chloride Content <0.1%: Potassium Sulfate with chloride content below 0.1% is used in salt-sensitive crop fertilization, where it avoids phytotoxic risks and supports optimal yield. High Purity Food Grade: Potassium Sulfate high purity food grade is used in food processing additives, where it serves as a potassium source and acidity regulator. pH Stability 6–8: Potassium Sulfate with pH stability between 6 and 8 is used in hydroponic nutrient solutions, where it maintains nutrient balance and plant health. |
Competitive Potassium Sulfate prices that fit your budget—flexible terms and customized quotes for every order.
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Potassium sulfate has been a mainstay among agricultural and industrial grade chemicals for decades. Here on the production floor, every batch carries the mark of experience. Manufactured through the direct process that combines potassium chloride with sulfuric acid, the potassium sulfate we produce is the result of years of refining and optimizing — not from guesswork or shortcuts. From the raw material selection to the final drying step, each part of the process comes with hands-on attention and strict oversight. Nobody on the line wants unnoticed impurities; every crate that moves out our door tells a story about careful curation. Through high-quality input selection and process control, we stick to our purpose: getting farmers, horticulturalists, and industrial users a reliable, clean product batch after batch.
On a chemical level, potassium sulfate (K2SO4) stands out as a solid, white, non-hygroscopic powder or crystalline substance. Most of our output falls in line with standard grades — the granular type, which pours easily for broad-acre application, and the finer powdered grade for precision or foliar use. Sizing differs based on its destination: coarser material holds up against wind loss in field application, while the fine grade forms uniform sprays and solutions for greenhouses or hydroponic systems. The purity, often coming in above 98%, matters as nobody wants mystery elements showing up in soil or process streams. Low chloride content sits at the core of our production philosophy — ensuring trouble-free use where sensitive crops or downstream reactions can’t handle excess salt.
In the real world, fields don’t afford the luxury of “maybe” results. Potassium sulfate solves for more than just a nutrient shortfall — it helps shape the overall health, yield, and longevity of crops ranging from leafy greens to high-value fruits. Our clients work with everything from tobacco to citrus, potatoes to almonds. Out here, mistakes get expensive quickly. Potassium, in the right form, means crops stand up to stress, resist disease, and finish strong. For chloride-sensitive species like grapes and certain vegetables, this chemical brings plenty of potassium and sulfur without the baggage of high sodium or chloride content.
Spreading potassium sulfate often supports operations focused on root and shoot strength, fruit set, and resilience against drought or disease pressure. In our experience, fields that once saw lower yields after potassium chloride switched to our sulfate form and noted not only better quality at harvest but less leaf scorching and healthier soil microbe activity. Orchards struggling with saline water sources have stuck with the product for years, because it simply doesn’t add to salt load in the root zone. Even in greenhouse work, hydroponic growers trust that there are no contamination surprises. No slick marketing required in those instances — just clean product and dependable supply.
Process customers in glass, dye, and specialty materials rely on potassium sulfate for its reactivity and purity. Certain glass formulations can shift color or lose mechanical properties with trace contaminants, so consistent, uncontaminated feedstock is essential. Coming from a chemistry background, we know that the margin for error is thin: a few ppm of iron or heavy metals might cause entire runs to fall out of spec. Each lot we release undergoes dedicated QC not because it’s the industry standard, but because it’s the only way to maintain hard-won trust. Batch tracking, real-world sampling, and on-site analytics mean control from start to finish.
Our process chemists and plant operators have dialed in on the balance — rapid throughput without sacrifice on batch-to-batch reproducibility. Anyone can state “low moisture,” but in practice that means 0.1% or less to avoid caking in storage or flow interruptions during dosing. Practicality matters: handling a fine, dust-free powder that flows evenly makes a difference on the factory line, especially for automated batching systems. Industrial users return not for clever packaging, but for the certainty that the stuff coming off the railcar performs identically to the last shipment, and the one before that.
From the manufacturer’s perspective, potassium sulfate earns its spot atop the fertilizer shelf because it doesn’t just offer potassium; it brings in substantial sulfur as sulfate, in a form ready for plant uptake. Nutritionally, these two elements support not just yield, but the nutritional quality and storage life of produce. Farmers often weigh the cost-per-ton, but those with direct field experience know the value goes beyond the invoice: a single poorly-timed dose of high chloride fertilizer can wipe out a young grape vineyard’s productivity for years.
Potassium chloride generally costs less on paper and supplies plenty of potassium, but it also carries chloride levels that can “burn” crops sensitive to salt. Year after year, our orders spike from farms and greenhouses reporting yield hits and tip burn after repeated chloride applications, especially in regions where irrigation already brings salt risk. Potassium nitrate brings both potassium and nitrogen, useful in rapid-growth scenarios or where nitrogen use doesn’t push regulatory thresholds. Still, costs rise, and nitrogen timing must be tightly managed to avoid excessive vegetative growth or runoff.
Many clients have tested blended or “enhanced” potassium mixes, but come back to potassium sulfate for its predictability. It just fits where low chloride and added sulfur tip the equation in favor of crop safety and response. There’s little desire to gamble when climate, markets, and input costs already bring enough uncertainty.
Consistency is tougher to maintain than most believe. As a manufacturer, each season brings its headaches: variability in raw potassium chloride grades, process water purity, even the minor fluctuation in sulfuric acid strength. What comes out at the end must hit target purity and particle size every time, or the user suffers. That means constant attention — the difference between a seasoned plant team and a facility running on autopilot.
Take the problem of caking during high-humidity transit. If we slack on drying or rush the cooling stage, bags arriving at a customer’s fertilizer shed can stick together, forcing extra labor or complete product waste. Over the years, we’ve adjusted screen sizes, drying parameters, and storage protocols to head off these issues before they hit the customer’s hands. Manufacturing teams work closely with logistics, so weather data, warehouse conditions, and time in transit all inform fine adjustments to packaging and post-processing.
Color uniformity sometimes drifts when the raw materials change or equipment wears. Operators spot the difference by eye, not by spreadsheet. Immediate feedback from customers and our own teams makes it clear that off-color batches raise suspicion, even when purity checks out. As a result, routine preventative maintenance and process audits aren’t a formality — they’re a cost of entry in chemical manufacturing, especially for a staple like potassium sulfate.
Years of hands-on production hammer home a simple fact: what goes into the process matters as much as what comes out. Our bulk potassium chloride delivery partners have to show consistent supply and purity, since variability feeds straight into manufacturing headaches. We lock in sources that provide technical-grade inputs, and keep batch provenance records tied to every shipment. Any hint of heavy metals, excess magnesium, or intractable clays triggers an immediate stop to upstream production.
Sulfuric acid poses its own tests. Quality, strength, temperature, and handling — these key details become infinitely more important with a chemical like potassium sulfate that ends up in food and crop systems. Overdilution, contamination, or trace metals multiply downstream risks. Inside the chemical plant, piping, valves, and transfer pumps get selected for compatibility and longevity, not just on lowest up-front price. The culture here remains hands-on — production staff check transfer lines, double-check process tanks, and sample materials at each step.
Environmental responsibility sits at the center of every operation. Strict control over waste streams and fugitive emissions isn’t compliance theatre, but practical stewardship demanded by regulators, neighbors, and long-term customer relationships. In early days, the plant upgraded evaporators and scrubbers to cut down on SO2 emissions and liquid discharge. By doing so, we avoided repeated shutdowns while proving to customers that a manufacturer’s word about “clean” inputs holds up under scrutiny. Practically, cleaner production means fewer liabilities and smoother regulatory reviews. On a more tangible level, we all live downstream from someone else’s pipe.
With crop economics shifting every year, farmers and manufacturers do not work in a vacuum. Drought pressures, global trade instability, and input price swings test everyone’s mettle. We field questions daily about product availability, alternatives, granular versus powder, and real shelf life in unpredictable weather. Building reserves isn’t just about profit — it’s about answering a mid-season call from a loyal customer whose needs spike after a cold snap or untimely rain.
Feedback loops between end users, agronomists, and manufacturers drive small changes on the plant floor. If repeat customers report dustiness in the powder, we tighten milling screens and add dust collection. When growers in arid regions note faster caking, we review anti-cake addition protocols and shift packaging specs. Each call pushes our manufacturing teams to adapt, not slide into complacency. For specialty uses — like fertigation in high-tech greenhouses — operators adjust not only sieve sizes but wash protocols to bring salt content below already tight tolerances.
We bridge the field and the factory every week. Field reps send urgent photos of clumping, discoloration, or unexpected residue, and those insights land with the quality team. Issues that look like “just a number” on a report become personal when they land on a friend's crop or a long-time partner’s processing line.
Many of the customers who stick with us have worked through a bad shipment of fertilizer or a questionable industrial batch at least once. Trust doesn’t come from slogans — it’s earned from transparency, steady results, and responsive support. Each shipment leaves our site with a unique lot number tied back to raw material sources, process records, and a batch history. This isn’t about box-ticking: repeated audits from partners and global buyers demand proof that every claim checks out.
Our in-house laboratories run analysis on every batch, checking more than just headline nutrients. Sulfate content, heavy metal traces, insoluble residues, and moisture get flagged if anything looks off. Instead of hiding behind generic “meets spec” language, we open records to partners who ask. Many contract growers and industrial processors send their own auditors or labs to spot check. We welcome this scrutiny. High-pressure, real-world environments require guarantees — not just paperwork.
Open collaboration with buyers and technical experts means we stay ahead of market or regulatory shifts. When certain countries raised questions about trace element limits or banned certain anti-caking agents, our team preemptively reviewed formulations and swapped out anything questionable. Sometimes the guidance turns out to be excessive. Still, it’s easier to sleep when you know the next shipment is already compliant, rather than waiting for a recall notice or import rejection.
As climate patterns shift and water scarcity sharpens, the push for fertilizers that avoid salinizing soils continues to grow. Potassium sulfate meets this demand naturally, limiting the buildup of sodium and chloride that comes with cheaper alternatives. On sites struggling to reclaim saline or sodic land, the majority of consultants and agronomists point back to potassium sulfate as a key step in soil recovery programs. After years of observing field trials and reclamation projects, this advice stands up to scrutiny: using the right blend restores productivity, improves soil structure, and maintains microbial health.
Long-term success in agriculture — as well as in glass, ceramics, or dye manufacturing — depends on sticking to quality and refusing shortcuts. Years spent on the line, tweaking process formulas and responding to last-minute orders, have shown that an honest batch of potassium sulfate delivers more than numbers on an assay sheet. A reliable supplier relationship gives users peace of mind, letting them plan seasons or production cycles without suspicion.
No chemical exists in a vacuum. Predictable, high-purity potassium sulfate feeds into a supply chain extending all the way from upstream mining to fields, factories, and retail shelves worldwide. Every player along that line trusts that the next step carries no unpleasant surprises. On our end, that means being forthright about what’s in the bag, standing behind product claims, and keeping communication open through every skid, sack, and tonne.
Day-to-day, the challenges in manufacturing potassium sulfate rarely slow down. New harvest data, regulatory reviews, shifts in end-user demand all drive continual improvement at the plant. These cycles push our crews to maintain both traditional know-how and embrace sensor-assisted process controls. Worker expertise, seen in a veteran’s quick eye for minor color changes or noise in the mill, blends with analytics to ensure nothing slips by unnoticed.
New process improvement projects take time and investment. For instance, ongoing work explores ways to reduce waste by capturing sulfur-rich off-gasses for reuse, or by reprocessing filter cakes into lower grade products for less demanding markets. The goal is clear: refine efficiency, drive down cost, and shrink environmental footprint while ensuring the top-grade output expected by food and specialty chemical buyers. The production teams gather weekly for cross-discipline trouble-shooting — maintenance, logistics, chemistry, and quality staff tackling both immediate issues and longer-term bottlenecks. Lessons learned make their way back to research staff, feeding innovation that actually roots in shop floor realities.
With each order, our work bridges the chemical plant, distribution chain, and the fields or factories putting potassium sulfate into action. Support doesn’t come from generic answers — anyone answering the phone or walking the plant floor has their own stories about resolving tricky logistics, prepping emergency orders for extreme weather, or tweaking output specs for a new market. It’s not glossy, but it’s real.
Whether in the hands of a grower aiming to maximize a season’s fruit load or in a factory blending glass for precise optical properties, potassium sulfate translates to control. It doesn’t mask mistakes with unpredictable byproducts or cause downstream problems hidden by specifications. Reliable potassium and sulfur feed the world’s crops, stock, and manufacturing streams. Shared interest in crop safety, environmental health, and product consistency create a bond between producer and user that’s hard to capture in technical brochures.
Our experience producing potassium sulfate shows daily that every detail — from input control to customer service — lands in every final use. Mistakes aren’t theoretical; they leave immediate marks on fields, processing lines, and reputation. People rely on our crew’s decisions, and the crew takes that seriously. This responsibility keeps quality at the fore, and drives the patience, dedication, and sense of ownership that mark each successful batch.
Season after season, the demands grow, weather and markets keep changing, and new standards challenge old routines. What doesn’t change is the need for products that simply work, every shipment, every time. Potassium sulfate, as made here, meets that standard — by the hands and eye of those who know both the stakes and the science, and who plan on sticking around for the next round of challenges.