Heptahydrate Magnesium Sulphate

    • Product Name:Heptahydrate Magnesium Sulphate
    • Chemical Name (IUPAC):Magnesium sulphate heptahydrate
    • CAS No.:10034-99-8
    • Chemical Formula:MgSO4·7H2O
    • Form/Physical State:Crystalline solid
    • Factroy Site:No.3369 Bohai 10th Road,Lingang Economic Zone,Binhai New Area,Tianjin City,China
    • Price Inquiry:sales2@liwei-chem.com
    • Manufacturer:Tianjin Soda Plant
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    Specifications

    HS Code

    720304

    Product NameHeptahydrate Magnesium Sulphate
    Chemical FormulaMgSO4·7H2O
    Molar Mass246.47 g/mol
    AppearanceColorless or white crystalline solid
    OdorOdorless
    Solubility In WaterEasily soluble
    Density1.68 g/cm3 (at 20°C)
    Melting Point150°C (decomposes)
    Cas Number10034-99-8
    Ph5.5–7 (5% solution at 20°C)

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

    Packing &Storage
    PackingWhite,sealed HDPE bag labeled "Magnesium Sulphate Heptahydrate, 25 kg," featuring hazard symbols,batch number,and manufacturer details.
    Container Loading (20′ FCL)Heptahydrate Magnesium Sulphate is typically loaded in 20′ FCL containers,with each container accommodating up to 25 metric tons in bags.
    ShippingHeptahydrate Magnesium Sulphate should be shipped in tightly sealed containers to prevent moisture loss. Store in a cool,dry place away from incompatible materials. Handle with care to avoid spillage. Ensure labeling meets regulatory requirements,and transport according to local,national,and international regulations for non-hazardous chemicals.
    StorageHeptahydrate Magnesium Sulphate should be stored in a cool,dry,well-ventilated area,away from moisture and incompatible substances such as strong acids. Keep the container tightly closed and clearly labeled. Avoid direct sunlight and extreme temperatures. Store off the ground and protect from physical damage to prevent contamination and caking. Use suitable packaging materials to minimize exposure to air and humidity.
    Shelf LifeHeptahydrate Magnesium Sulphate typically has a shelf life of 3–5 years if stored in a cool,dry,and airtight container.
    Application of Heptahydrate Magnesium Sulphate

    Purity 99%:Heptahydrate Magnesium Sulphate with 99% purity is used in fertilizer formulation,where it enhances magnesium uptake in crops.

    Particle Size <100 µm:Heptahydrate Magnesium Sulphate with particle size less than 100 µm is used in foliar sprays,where it provides rapid absorption and uniform distribution.

    Molecular Weight 246.47 g/mol:Heptahydrate Magnesium Sulphate with molecular weight 246.47 g/mol is used in pharmaceutical manufacturing,where it ensures precise dosing in laxative formulations.

    Stability Temperature up to 48°C:Heptahydrate Magnesium Sulphate with stability temperature up to 48°C is used in chemical synthesis,where it maintains consistent reactivity during processing.

    Water Solubility 710 g/L (20°C):Heptahydrate Magnesium Sulphate with water solubility 710 g/L at 20°C is used in hydroponic systems,where it ensures immediate nutrient availability for plant absorption.

    Melting Point 150°C:Heptahydrate Magnesium Sulphate with a melting point of 150°C is used in industrial drying processes,where it acts as an efficient desiccant without structural decomposition.

    Heavy Metal Content <0.001%:Heptahydrate Magnesium Sulphate with heavy metal content less than 0.001% is used in food processing,where it ensures food safety and compliance with regulatory standards.

    pH (5% solution) 5.5–7.0:Heptahydrate Magnesium Sulphate with pH 5.5–7.0 in 5% solution is used in aquaculture,where it maintains optimal water conditions for aquatic species.

    Assay 98-102%:Heptahydrate Magnesium Sulphate with assay range 98-102% is used in laboratory reagent preparation,where it guarantees accuracy in analytical applications.

    Free Quote

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    Email:sales2@liwei-chem.com

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    Certification &Compliance
    More Introduction

    Understanding Heptahydrate Magnesium Sulphate from a Manufacturer’s Perspective

    Real-World Importance of Heptahydrate Magnesium Sulphate

    Heptahydrate Magnesium Sulphate,often recognized in the market as EPSOM salt,holds a deep-rooted place in many industries—agriculture,food processing,pharmaceuticals,and even water treatment. Decades of hands-on production have taught us that nothing beats a product that maintains consistency,purity,and reliability. Working with raw minerals on a daily basis,our team has to manage every stage to produce mag sulphate with seven water molecules,which gives it distinct solubility and handling features that users have relied on for generations.

    The Essential Details:Model and Specifications

    Evaluating grades and models means more than reading off a spec sheet. We produce Heptahydrate Magnesium Sulphate in granular and crystalline forms,with purity levels often surpassing 99.5% MgSO4·7H2O for both industrial and agricultural applications. Particle size plays an important role—coarser grains blend well into soil,while finer crystals dissolve more quickly,fitting the diverse application styles of our clients. This isn't a commodity where “good enough” makes the cut. Each ton reflects careful control over content—especially the absence of contaminants like heavy metals, which we regularly test up and down the line. Real differences from other grades, such as anhydrous or monohydrate magnesium sulphate, stem from the crystal water content. The seven water molecules in Heptahydrate deliver distinctly higher solubility, easier dissolution, and a naturally flowing product that resists caking in storage. We’ve seen how even slight shifts in water of crystallization change the way our product behaves in mixing tanks and fieldwork.

    Process Insight: From Extraction to Consistent Output

    Years on the production floor drive home that raw material selection and careful processing matter more than any single downstream step. Heptahydrate Magnesium Sulphate requires careful hydration control. Once extracted, magnesium-rich feedstocks undergo controlled reaction with sulfuric acid and precise water dosing. Temperature, pressure, and cooling rates must be monitored continuously to prevent formation of unwanted lower hydrates or anhydrous phases. Mistakes show up quickly—cloudy solutions, lumpy product, or rapid caking in bulk storage. Skilled operators tweak settings based on real-time results, not lab theory. Batch runs destined for pharmaceutical, food, or feed use get tested for their heavy metal content, clarity in water, and even taste in some cases. Field feedback also comes in handy—our close relationships with agricultural partners show us right away if a lot behaves out of the norm, and we adjust processes accordingly.

    Far-reaching Applications

    Magnesium is fundamental to plant growth—chlorophyll cannot exist without it. Fertilizer blends often boost yields with magnesium from our product, especially in soil types prone to deficiency. Having met with growers in paddy fields, coffee plantations, and even urban greenhouses, I’ve seen how they depend on a product that dissolves fast, doesn’t clog, and supplies the right magnesium level with each application. It also finds practical use as a feed supplement, counteracting grass tetany and improving animal health with reliable magnesium intake.

    Pharmaceutical makers rely on Heptahydrate for various medicinal and nutritional preparations. Since our batches meet food and pharmaceutical standards, they end up in oral magnesium supplements, medical-grade saline solutions, and even topical preparations. Here, purity and trace-element control become even more critical. Our quality checks focus on ensuring each crystalline lot is free from excessive iron, lead, arsenic, or other trace minerals that compromise compliance and patient safety. We learned the importance of this through repeated audits and firsthand collaboration with formulation experts needing predictable supply characteristics.

    Heptahydrate also plays a role in water treatment, paper manufacturing, and textile dyeing. In waste treatment plants, magnesium sulphate helps precipitate out unwanted impurities. Our longstanding partnerships with regional water boards and textile mills confirm the need for consistency—shift after shift, year after year.

    How Heptahydrate Stands Out from Other Magnesium Sulphates

    Working directly with both anhydrous and monohydrate forms, real-world differences become obvious. Heptahydrate absorbs and holds moisture without turning sticky or clumping, thanks to its stable crystalline matrix. In storage silos, it flows evenly, resisting both caking and dusting compared to more hygroscopic lower hydrates. The high water content means it dissolves fully and quickly—critical when field sprayers or formulation tanks can’t afford residue buildup.

    Anhydrous and monohydrate forms do serve specialty needs where water presence must be minimized, but most blending and application setups benefit from the fast dissolution and bulk density of the seven-water structure. Heptahydrate crystals tend to remain stable under most typical humidity levels—meaning supply chains do not face as much stock loss through clumping, hardening, or sudden phase change. From distributor warehouse to end-user, more of our material makes it to the intended application, unspoiled. We’ve run parallel trials; Heptahydrate outpaces lower hydrates in speed of dissolution in cold and warm water alike.

    User-Focused Features and Solutions Gleaned from Experience

    From talking directly with customers—some long-timers who have relied on our production line through generations—it’s clear that practical features matter most. They want dust-free, easily spreadable material for the field. They want product that won’t gum up precision injectors or feeding systems. Our manufacturing lines have adapted step by step, adding sieving, anti-caking processes, and smart packaging to fit harsh transport realities across climates. We heed feedback about particle size drift or clumping; production engineers respond by fine-tuning drying temperatures or packaging options.

    Bulk buyers handling pallet lots prefer sturdy, moisture-resistant packaging. We field-tested a range of liners and bags to prevent ingress during stormy seasons. For clients handling smaller lots, we invested in easily resealable pouches, which protect contents from humidity on warehouse shelves. This reduces waste and preserves quality, even in variable conditions.

    Magnesium sulphate production doesn’t escape scrutiny over environmental impact either. We designed closed-loop systems to recover process water and minimize acid usage, reducing chemical load on local water sources. After seeing run-off issues firsthand, it made sense to install water recycling loops and invest in monitoring tools to gauge discharge quality and ensure compliance with local environmental legislation.

    Navigating Challenges and Ensuring Quality

    The manufacturing environment never stands still. Shifts in market quality demands, regulatory scrutiny, and raw material prices always press us to adapt. Fluctuating feedstock purity often prompts swift recalibration of dosing and filtration machinery. Even minor contamination issues—an errant batch with elevated iron, for example—mean corrective actions, root-cause analysis, and either re-work or responsible disposal. We embraced in-line testing and digital monitoring, not just for regulatory peace of mind but to deliver the reliability that longtime customers have come to expect.

    Shipping also presents its own hurdles. Our team found that surface humidity in shipping containers can degrade open bags, even under controlled storage. We developed dedicated load-out and loading procedures, including clear traceability for each batch—the result of learning from experience when a shipment bound for a remote destination arrived with minor clumping. Adjustments in drying and bagging, as well as training to ensure airtight seals, now minimize recurrence. Each lesson has made our product more resilient, from production across the sea to distant farm or factory.

    Fact-Driven Assurance and Traceability

    As regulations tighten, demand for traceable, contaminant-free mineral harvests has increased. We instituted batch coding, in-house retention samples, and recurring third-party laboratory verifications. This helps us address recall fears quickly and prove quality in black and white. Our production archives cover years of lot tracking, which assures clients—and their regulators—of consistency. Besides regulatory needs, these practices also instill discipline up and down our operation. Engineers and operators take pride in seeing external tests confirm what we maintain internally.

    We have seen, too, that detailed recordkeeping speeds up problem-solving. If a downstream product developer calls to question a sulfate supply, we can quickly retrieve batch results, pinpoint possible causes, and propose corrective actions—all based on hard data. Over the years, this meticulousness has strengthened trust with both long-standing and new customers.

    Market Trends and Customer Preferences

    Customers increasingly call for verification of sustainably produced minerals, and we have responded by documenting sourcing and reduction of waste in our own operations. Corporate buyers now ask for lifecycle impact statements, pushing us to calculate and verify each stage from mine gate to delivery. We see the uptick from the food and pharmaceutical industries, with buyers seeking detailed breakdowns of heavy metal levels, soluble magnesium yield, and clarity in water. Rather than chase the latest trend, we focus on maintaining uninterrupted production and addressing end-user needs in real time.

    Smaller agricultural buyers tell us they value small-batch reliability and the ability to source directly without doubts over adulteration. We’ve responded by setting up retail-friendly distribution while keeping the same rigorous quality checks. Industrial users, facing shrinking downtime windows, come for consistently free-flowing, easy-to-handle product that fits seamlessly into existing mixing systems.

    Learning from the Field: Problem-Solving in Real Time

    The best process improvements come from listening to those who actually use our magnesium sulphate day in and day out. Applicators, machinery engineers, agronomists, and even packaging handlers let us know the impact of each tweak and correction. Over the years, fixable problems—like slow-dissolving lumps, product hardening at the base of storage bins, foaming during tank filling—prompted us to refine both the product and its packaging.

    Machinery engineers told us that fine dust created maintenance headaches; we reduced fines through better sieving and upgraded our dust-extraction points inside the mill. Growers faced blockages in nozzles; we analyzed defective lots and optimized crystal shape and size distribution. Sometimes, just seeing users tackle a problem on site forces a change in the plant that reduces failures across the board.

    Our lineworkers know from years in production that small mistakes catch up later on. For example, a near-undetectable change in drying curve can lead to beads that look perfect but start clumping after two weeks in the warehouse. Learning and re-learning, we adjust, track outcomes, and return to the lab until repeat shipments come out right. As a result, most issues disappear before customers ever have to send in complaints.

    Actual Consequences: Reliability Matters

    We have met end-users whose business depends on a steady magnesium supply—dairy farmers, city horticulture departments, medical suppliers preparing intravenous drips. Unstable quality, shipment delays, or unclear test data can hurt their bottom line or even impact health and safety. Manufacturers who compromise on source control or shortcut processing steps sometimes flood the market with inconsistent batches, tainting supplier trust across the board. Our long-term experience demonstrates that reputation depends on acting quickly when something goes amiss, as well as sharing clear, verifiable documentation with customers from the outset.

    Handling complaints may not be a glamorous side of business, but we have learned how vital rapid response is in retaining loyal clients. That’s done not with jumping through procedural hoops, but by keeping open lines of communication, drawing upon years of batch data, and dispatching replacements or technical support where needed. These are not anonymous, untraceable interactions; in several cases, producers and farmers have invited us on-site to see first-hand the impact of supply interruptions, giving us vital insight to improve.

    Optimizing for Value: Making Every Kilogram Count

    Today, competitive pricing and value often take center stage in procurement. The true cost of magnesium sulphate, though, runs deeper than raw price per kilogram. Material that clumps, fails purity tests, or dissolves slowly can waste hours and money. Each kilogram purchased from our facility reflects investments in quality control, testing, streamlined delivery, and a long history of incremental improvement. Big or small, every buyer benefits from these refinements, which translate to fewer returns, easier handling, and smoother operations.

    Choosing model and granulation should follow expected application. For fast-dissolving nutrient solutions or pharmaceutical preparations, a smaller crystal size facilitates rapid mixing. Agrarian uses benefit from medium-coarse particles that don’t blow away or leach too quickly. Market trends sometimes drive requests for ever-higher purity, even where “technical grade” sufficed in the past; we adapt by allocating extra resources to select and refine only the most suitable lots. It's not unusual to field sample requests,run custom analyses,and share third-party results to reassure new customers or compliance officers.

    Continuous Improvement and Trust-Building

    The push for greener practices in chemicals production led us to initiate in-factory water recycling,emissions capture,and waste reduction. These investments improve our environmental profile and build goodwill with local regulators and the broader community. Over time,we’ve been able to reduce our raw water intake and energy use thanks to more efficient crystallization and recovery equipment. Talk with plant engineers and they’ll tell you this takes significant effort and teamwork,but the payoff comes through lower environmental costs and a stronger,more resilient facility.

    Down the supply chain,more buyers check for ethical sourcing statements and certified management systems. Our documentation reflects regular site audits and compliance with relevant environmental and quality standards;those records back up every shipment we send. From the sourcing of raw magnesium ores to the final packaged bags or drums,the whole process stands open to review—and that openness builds trust with partners large and small.

    Looking Ahead:Heptahydrate Magnesium Sulphate in a Shifting Market

    As the world adapts to heightened demand for clean agriculture inputs,fortified foods,and traceable minerals,our experience with heptahydrate magnesium sulphate production remains directly relevant. Users keep setting the bar higher for purity,ease of handling,traceability,and sustainability. Competitive pressure ensures that only those who evolve—who pay attention to actual feedback and continually raise quality—can thrive.

    The lessons we gather from years of direct manufacturing,batch testing,facility refinement,and technical support all filter into the product that reaches our customers. Differentiation from other magnesium sulphate forms starts with understanding their practical limitations and knowing how genuine heptahydrate solves more problems,across a range of climates and uses. Each batch represents a joint effort across departments—raw material buyers,plant operators,quality testers,logistics crew,and customer support—every one contributing to a reliable,reputable final product.

    Those who have handled our product in the field,in the lab,or in the warehouse see the results every day—steady yields,clear solutions,trouble-free storage,and unmatched peace of mind. That kind of reliability only comes from direct,accountable manufacturing backed by ongoing willingness to listen,adapt,and improve. As needs continue to evolve,we keep pace—learning from every bag,every batch,every partner along the way.