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Iron Sulfate

    • Product Name Iron Sulfate
    • Alias Ferrous Sulfate
    • Einecs 231-753-5
    • Mininmum Order 1 g
    • Factory Site Tengfei Creation Center,55 Jiangjun Avenue, Jiangning District,Nanjing
    • Price Inquiry admin@sinochem-nanjing.com
    • Manufacturer Sinochem Nanjing Corporation
    • CONTACT NOW
    VTB
    Specifications

    HS Code

    801200

    Chemical Name Iron Sulfate
    Chemical Formula FeSO4
    Molar Mass 151.91 g/mol
    Appearance Pale green crystals
    Solubility in Water Soluble
    Melting Point 64°C (heptahydrate decomposes)
    Density 1.898 g/cm³ (heptahydrate)
    Odor Odorless
    CAS Number 7720-78-7
    pH (Solution) 2-3 (for 5% solution)
    Common Hydrated Form FeSO4·7H2O (heptahydrate)
    Boiling Point Decomposes before boiling
    Color Change on Oxidation Turns brown due to ferric oxide
    Uses Fertilizer, water treatment, iron supplement

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

    Packing & Storage
    Packing The packaging for Iron Sulfate features a sealed, durable 25 kg bag, labeled with product name, hazard symbols, and handling instructions.
    Shipping Iron sulfate should be shipped in tightly sealed containers made of materials resistant to corrosion, such as plastic or coated drums. It must be stored and transported in a cool, dry, well-ventilated area, away from incompatible substances like strong oxidizers. Ensure proper labeling and adherence to all relevant transportation regulations.
    Storage Iron sulfate should be stored in a cool, dry, and well-ventilated area away from incompatible substances such as strong oxidizing agents. The container must be tightly closed and clearly labeled. Avoid exposure to moisture, as iron sulfate is hygroscopic. Storage areas should prevent environmental contamination and maintain the chemical in a stable, non-reactive state. Always follow relevant safety regulations.
    Application of Iron Sulfate

    Applications of Iron Sulfate in Industrial Manufacturing

    Iron sulfate, widely used in various industrial sectors, demonstrates significant utility due to its chemical properties and reliable reaction consistency. As a direct manufacturer, we ensure our iron sulfate meets accurate industrial formulas, regulatory compliance, and downstream production needs. Below, we detail precise applications and integration points across key industry segments.

    1. Water Treatment: Coagulation and Phosphorus Removal

    Municipal and industrial plants employ iron sulfate as a coagulant for wastewater treatment and phosphate precipitation. The compound effectively destabilizes colloids and facilitates the removal of dissolved phosphates, aiding regulatory compliance for effluent discharge. Plants select formulations based on influent water quality, balancing dosing for both optimum removal efficiency and minimized sludge generation.

    Industry compliance standards

    • U.S. EPA National Pollutant Discharge Elimination System (NPDES)
    • EU Water Framework Directive 2000/60/EC
    • GB/T 31962-2015 Discharge standard of water pollutants for the textile dyeing and finishing industry
    • WHO Guidelines for Drinking-water Quality

    Typical usage ratio

    • 5–50 mg/L for phosphate removal, adjusted according to influent load and targeted outflow concentrations
    • Coagulation dose set by jar tests; generally 10–100 mg/L

    Downstream process integration

    • Direct injection into raw water stream before flocculation and sedimentation
    • Dosing at secondary clarifiers in advanced wastewater treatment
    • Integration with automated chemical feed systems updated by online monitoring

    Final product types

    • Treated potable water meeting regulatory limits
    • Treated industrial discharge water
    • Stabilized wastewater sludge for safe disposal
    • Sludge cakes for cement or landfill use

    2. Cement Manufacturing: Chromate Reduction

    In the cement industry, iron sulfate functions as a reducing agent to convert hazardous hexavalent chromium (Cr(VI)) into environmentally benign trivalent chromium (Cr(III)). European legislation strictly controls Cr(VI) levels in Portland cement. Dosage and blending strategies depend on finished cement quality control requirements and clinker composition, with QA labs monitoring residual Cr(VI) levels throughout production.

    Industry compliance standards

    • EU Directive 2003/53/EC for hexavalent chromium in cement
    • EN 196-10:2016 Testing methods for cement – Determination of water-soluble chromium (VI)
    • REACH Regulation (EC) No 1907/2006
    • GB 175-2020 Standard for Portland Cement

    Typical usage ratio

    • 0.2–0.6 kg per ton of cement, based on initial chromium content and target reduction
    • Fine adjustments made in response to clinker variability and seasonal changes

    Downstream process integration

    • Premixing with gypsum or other cement additives prior to final milling
    • Continuous dosing at the cement mill’s additive feeder system
    • Real-time process control with laboratory verification of Cr(VI) content

    Final product types

    • Low-chromate Portland cement (<2 ppm Cr(VI))
    • Bagged cement for export or domestic use
    • Ready-mix concrete for construction
    • Precast concrete blocks and panels

    3. Pigment Manufacturing: Precursor for Iron Oxide Pigments

    Manufacturers synthesize iron oxide pigments from iron sulfate, applying controlled thermal decomposition or precipitation routes. The product purity, particle morphology, and shade require strict temperature and pH controls during processing. Downstream pigment producers rely on stable iron source quality for batch-to-batch reproducibility in coatings, plastics, and colored construction materials.

    Industry compliance standards

    • ASTM D769-15 Standard Specification for Pigments
    • ISO 1248:2014 Iron oxide pigments – Specifications and test methods
    • EN 12878:2014 Pigments for construction materials
    • REACH registered substances database

    Typical usage ratio

    • 100% for pigment precursor
    • Impurity control according to target pigment grade (technical, construction, or food-grade)

    Downstream process integration

    • Thermal decomposition in rotary kilns for red/yellow iron oxide production
    • Precipitation methods for micronized pigment grades
    • Oxidation step monitored for hue and particle uniformity

    Final product types

    • Red, yellow, and brown iron oxide pigments
    • Pigments for decorative coatings and inks
    • Pigmented stuccos and mortars
    • Color masterbatches for plastics

    4. Agriculture: Correction of Iron Deficiency in Soil and Fertilizer Blends

    Fertilizer and soil amendment producers incorporate iron sulfate for iron enrichment to treat chlorosis and prevent crop yield loss. Accurate blending ensures iron availability while minimizing overapplication and soil acidification. Regulatory bodies set limits for heavy metals and purity. Downstream integration focuses on blend uniformity and compatibility with other micronutrient formulations.

    Industry compliance standards

    • FAO Fertilizer and Plant Nutrition Bulletin No. 19
    • EU Regulation 2019/1009 on fertilizer products
    • AAPFCO (Association of American Plant Food Control Officials) Model Fertilizer Bill
    • China NY 525-2021 Standard for compound fertilizer

    Typical usage ratio

    • 0.5–2% by weight in compound or blended fertilizers
    • 20–100 kg/ha as a soil application, adjusted per crop and deficiency severity

    Downstream process integration

    • Dry blending with NPK bases for granular fertilizers
    • Liquid micronutrient formulation for foliar or fertigation application
    • Co-granulation or prilling for dust control and field application stability

    Final product types

    • Chelated micronutrient fertilizers
    • Soil conditioners for agriculture and horticulture
    • Water-soluble iron supplements
    • Lawn and turf care granules

    5. Animal Feed: Trace Mineral Source

    Feed compounders use iron sulfate in premixes for livestock, swine, and poultry to prevent anemia and support metabolic function. Integration requires precise batch control to meet nutrition specifications and avoid heavy metals or dioxin contamination. Production lines rely on dust-suppressed iron sulfate for safe handling and homogenous mixing, with all batch records traceable for quality assurance audits.

    Industry compliance standards

    • EU Regulation (EC) No 1831/2003 on additives for use in animal nutrition
    • AAFCO (Association of American Feed Control Officials) Official Publication
    • China GB/T 13078-2017 Standards for feed additives
    • GMP+ Feed Safety Assurance Scheme

    Typical usage ratio

    • 200–500 mg/kg in complete feed, adjusted for species, age, and dietary iron content
    • Trace mineral preblend typically 1–3% inclusion of iron sulfate

    Downstream process integration

    • Incorporation during the premixing stage of feed production
    • Micro-dosing systems for homogeneous distribution
    • Batch blending with constant quality checks for heavy metal content and particle size

    Final product types

    • Complete compound feeds for poultry, swine, ruminants
    • Vitamin-mineral premixes
    • Milk replacers
    • Pet food supplements

    6. Textile Dyeing and Printing: Mordanting Agent

    Textile processors apply iron sulfate as a mordant to improve dye fixation on cellulose and protein fibers. Accurate dosing during mordant baths or aftertreatments ensures color fastness and uniformity. Downstream integration must comply with textile chemical regulations and effluent discharge rules. Batch traceability and purity checks are essential for exports—especially for OEKO-TEX® and ZDHC-compliant goods.

    Industry compliance standards

    • OEKO-TEX® Standard 100
    • ZDHC (Zero Discharge of Hazardous Chemicals) MRSL
    • EU REACH Annex XVII for restricted chemicals in textiles
    • GB/T 29862-2013 Textile labeling rules

    Typical usage ratio

    • 1–4% on weight of fabric (owf) in dyeing or printing processes
    • Dose fine-tuned based on fiber type and shade depth required

    Downstream process integration

    • Mordant bath prior to dyeing for cellulosic/animal fibers
    • Addition in post-dye washing for improved fixation
    • Closed-loop water recycling systems for reduced effluent load

    Final product types

    • Yarn-dyed and piece-dyed fabrics
    • Printed cotton, linen, and wool textiles
    • Apparel meeting eco-label requirements
    • Decorative fabrics for interiors and automotive
    Free Quote

    Competitive Iron Sulfate prices that fit your budget—flexible terms and customized quotes for every order.

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    Certification & Compliance
    More Introduction

    Iron Sulfate: Direct from the Production Source

    Reliable Iron Sulfate, Produced with Decades of Factory Experience

    In our own plants, iron sulfate starts with a hands-on approach. For over 20 years, our team has poured focus into every step of its production. We know the source, the raw pyrite or iron filings, and every batch reflects this direct oversight. Practically every bag and barrel that leaves the yard has met a set of standards shaped by real-world problems faced by farmers, water treatment operators, feed mills, and industry workers. While some suppliers are content to mix or bag what comes through a shipping port, we control the process. That means tighter management of purity, chloride content, granulation, and stability, with none of the shortcuts that too often show up from third parties.

    Our Models and Specifications: Meeting What the Job Demands

    Iron sulfate comes in several forms, but ferrous sulfate heptahydrate remains front and center for most applications. Powdered heptahydrate fits bulk agriculture and water treatment needs, where quick dissolution matters. Granular and crystalline grades find fans among those needing less dust, better flow, or targeted fertilizer blends. We produce high-purity grades on dedicated lines, separate from grades meant for non-sensitive tasks. These purer forms seldom leave our gate unless customers order with strict requirements for heavy metals, insolubles, or color. We routinely see requests for bespoke specs, so our operations have adapted to flex on Fe content (often above 19.7% for heptahydrate), moisture, and particle size. Our feed-grade supplies undergo tighter testing for trace element profiles, because we know how strict downstream controls get in animal nutrition.

    Alongside these, we offer other forms: monohydrate for compact packaging and greater iron per kilo, and technical grades that target industrial and water facility contracts. No model sits on the shelf long. Turnover stays high because freshness and flowability give real trouble if finished product sits in a damp warehousing spot too long. Our staff keep storage dry and monitor for caking as a matter of course. Lessons from past years, where shipments faced the tropics or long ocean voyages, led us to add more robust bagging and fast dispatch protocols so end users don’t open up ruined goods.

    The Strengths of Direct Manufacturing: Quality Matters

    Anyone who has handled a poor batch of iron sulfate knows the headaches: clumped-up powder, inconsistent Fe readings, or residues that plug up mixing tanks. Our position as a direct manufacturer changes that by removing uncertainty around supply chain tricks. Cheap blends or low-grade imports, often “cut” with excess moisture or byproducts, appear on the market every year. These can create unplanned costs on the farm or plant—lower yields, blockages, or hazardous waste spikes. In our operation, heavy use of on-site chemical analysis, titration, and drying ensures each delivery meets spec.

    By working on the production line, our team understands the nuisances of off-colour, heavy metal intrusion, and chloride. Chinese-made iron sulfate, for example, sometimes arrives with a faint smell and sticky feel, owing to high chloride and excess water content—outcomes of process shortcuts or poor raw materials. Many customers who first tried these grades report reduced efficacy or have trouble with corrosion in their application. Drawing on our own experience, our process hangs on minimizing chloride carryover, filtering out insolubles, and calibrating dryer settings according to the raw batch sourced that month. The goal is always reliable Fe levels and long shelf life—qualities prized in feed mixing, foliar application, or flocculation jobs.

    Applications That Benefit from Factory-Level Controls

    Iron sulfate’s story stretches beyond fertilizer. Factories like ours see the breadth of its applications — as an agricultural micronutrient, flocculant, pigment intermediate, and animal feed additive. Over many years, we have supplied municipal water providers and seen first-hand how excess insolubles or variable iron content can foul up dosing pumps or cause sludge disposal issues. The difference between “out-of-the-bag” usability and time-consuming rework comes from sticking to controlled temperature, tight filtration, and storage practices that cut down the dust or caking.

    For agricultural uses, especially correction of iron chlorosis, the right form counts. Powder dissolves quickly and suits fertigation or direct spraying. Granules handle blending with NPKs or other trace elements, without the dust cloud that powder sometimes brings. From our vantage point, crop yields and feed conversion rates link directly to how confidently customers apply the product. Users who work off generic spec sheets from unknown origins face more troubleshooting. As the source, our technical support focuses on answering the tough questions farmers and nutritionists ask — not vague pamphlet lines, but field-proven guidance on compatibility, reactivity, and safety.

    Iron Sulfate vs. Other Iron Sources

    Not every iron supplement behaves the same. Ferrous sulfate stands apart for its cost-effectiveness, high iron solubility, and proven track in many industries. Chelated irons, while effective in some specialty roles, come at a significant price jump, which does not suit mass agriculture or water treatment contracts. Alternatives like ferric chloride or ferric sulfate handle some oxidation-based jobs well but miss the lower reactivity and nutrient uptake efficiency of ferrous grades. These ferric salts often handle sewage or certain pigments but find little demand as direct soil amendments, due to low plant uptake and higher corrosiveness.

    Over the years, we have compared customer feedback from users who tried iron chelates in controlled greenhouse work, then switched to ferrous sulfate as scale ramped up. Results in broad-acre scenarios generally favor ferrous sulfate, as cost per effective iron unit remains lower and response visible within a season. Water treatment firms have taught us another lesson: stability in supply and results weigh most heavily, not the latest product trend. Iron sulfate, because of its predictable chemistry, delivers batch-to-batch results when sourced from reputable factories.

    On-Site Quality Control: Not Just a Certificate

    It’s easy to talk about quality paperwork, but less easy to stand behind it when issues arise. Many batches look fine on a printed sheet—until they hit a mixing tank or a field sprayer, where moisture, caking, or contamination appear. Being the manufacturer, we take complaints directly, investigate, and adjust. In our years of operation, we’ve set up batch retention and on-site testing. Visitors touring our plant see jars lined up, each holding a sample from every lot shipped in the past year, labeled by date and lot number. This forensic trail lets us trace and fix root causes if an issue surfaces weeks later.

    The difference this oversight makes shows up most clearly in animal feed and water industries. Minor heavy metal contamination—sometimes from slipshod handling or impure water in the process—can throw a wrench in feed mill compliance. Some vendors pass blame or claim “unknown origin.” We don’t get to hide. We know where each lot comes from, and technicians run atomic absorption checks at intervals that genuinely protect the supply chain. Factory-direct means that if an alarm comes up, we can trace back through storage, drying, or batch mixing steps and correct fast; we’ve shut lines and improved protocols on short notice when needed.

    Iron Sulfate and the Path to Better Outcomes in Agriculture

    Out in the fields, responding to iron deficiency can make or break a crop. Growers from orchards to soybean acres contact us about persistent yellowing, slow growth, and poor chlorophyll development. From first-hand review of returned samples, we see most cases tie back to low-Fe soils and high pH, where typical soil iron locks up. Liquid and granular iron sulfate, blended with familiar fertilizers, gives growers a tool that fits into what they’re already doing. The practical result: leaves turn greener, shoots recover, and yield picks up, with no exotic new equipment or extra training.

    A lot goes into timing and application, though. Not all soils or climates respond identically—something we learned the hard way after early shipments to sandy, high-leaching regions and heavy, alkaline clays. Our staff often walks through application plans with customers, discussing split-dosing, the right mixing order, or how to time foliar sprays for best uptake. These details matter as much as iron content. In regions hit by drought, for example, we recommend specific grades less likely to bring excess salts, because water stress makes root burn more likely.

    Another clear advantage from controlling our own process: we can develop special blends, merging iron sulfate with magnesium or trace elements that address more than one deficiency. Multinutrient products built off our base sulfate have supported specialty crops and high-value export farms. By working with agronomists, not just selling to them, we improve our grades. Some of these innovations started at the request of a customer battling stunted citrus, then spread across vineyard and orchard country as word of mouth traveled.

    Supporting Water Treatment and Environmental Uses

    Iron sulfate’s demand in water treatment draws from its reliable chemistry. Municipal plants rely on it for precipitating phosphates, controlling hydrogen sulfide, and clarifying effluents. We have worked hand-in-hand with engineers managing everything from small-town lagoons to sprawling city systems, so our technical team doesn’t stand on abstract instructions. Instead, we troubleshoot real issues: running pilot jar tests to confirm flocculation, optimizing sludge formation, and reducing carryover of unreacted product. Feedback from these operations spurred our investments in filtration and purity upgrades—if impurities plug filters or foul sensors, everyone hears about it.

    Some water works face seasonal swings in source water quality or regulatory targets. Our custom packaging and flexible delivery schedules keep treatment plants stocked without excess waste or risk of spoilage. By collecting used bags, aiming for better logistics, and reducing dust in our lines, we help operators stay on target with minimal downtime. Attention to detail here grows from close ties to end users: maintenance teams and process techs who call us out on bag tears or rare caking events and expect real answers.

    Animal Feed and Iron Uptake: Getting the Details Right

    Animal nutrition mixes place harsh demands on raw materials purity, and ferrous sulfate sits in a crucial spot for pigs, poultry, and ruminant feed blends. Over our years supplying premixers, we noticed that inconsistent Fe or higher heavy metals can throw off dietary balance, causing failures in growth rates or compliance. Feed-grade iron sulfate from our line stays under agreed limits by maintaining tighter mineral content checks—particularly for arsenic, cadmium, and lead. On-feet, in-house monitoring, regular sampling, and random lot spot checks are the ways we back this up, not just certificates or spec sheets.

    Feed mill blenders need product that flows easily and blends uniformly, and a powder that cakes up or packs dense in the feed silo wastes time and money. We apply anti-caking steps and watch storage bins for humidity, based on what mill operators tell us about their blending headaches. The animal health side keeps pushing on consistency. Nutritionists challenge us on digestibility, solubility, and true uptake in livestock—we have answered these with side-by-side feeding trials, full disclosure on impurities, and willingness to adjust the drying phase or sourcing of base iron. These aren’t off-the-shelf fixes, and the process owes more to boots-on-the-ground factory managers and hands-on nutritional research than broad marketing claims.

    Safety, Environmental Concerns, and Responsible Practice

    Iron sulfate stays generally safe in the right hands, but safety procedures and regulatory checks count for everything in today’s world. From our plant to truckload delivery, we right-size shipments, minimize dust, reinforce key labels, and provide user info that comes from direct application, not legalese. Our record shows few accidents or complaints—a point of pride earned by answering tough questions and adapting as risks or reporting standards change.

    We also handle environmental questions up front. Iron sulfate brings risks if stored sloppily—leaks can lead to runoff, staining, or, over time, localized acidification. Our training for warehouse teams, measures for spill control, and batch tracking keep us ahead of most incidents. Many older factories worldwide have ignored these steps, leaving stains or contamination. We responded long ago, with sealed loading areas, concrete spill berms, and runoff plans. We welcome outside inspection and treat community relations as ongoing work, not PR spin. By maintaining transparency, inviting visits, and sharing test results, we keep a reputation built on reality.

    At the same time, we keep a close watch on the regulations shaping international trade of chemicals. From EU REACH compliance to internal QC exceeding local requirements, we set our own bar higher because being “good enough” does not keep customers out of trouble. We support clients with documentation, explain transport rules, and answer auditor queries with facts—not guesses or vague disclaimers copied online.

    Learning Through Years of Manufacturing and Direct Dialogue

    A manufacturer’s perspective grows sharper with every batch made and every call handled. Our senior staff recall early years when resources ran thin, and lessons came the hard way—missed shipments, spoiled lots, and frustrated farmers or engineers. Some of our longest-standing buyers have been with us over ten years; others walked away after a single problem, only to return once they tried third-party supplies and saw the chaos that inconsistency breeds. Over this time, we have kept records by hand, on ledger and later in digital logbooks, about what went wrong and what worked. While technology helps, nothing replaces direct lines of accountability—being able to call the plant or visit the warehouse and see product in person.

    Our research into longer shelf life, moisture control, and best bagging formats grew directly from customer complaints. Any new product—say, a lighter-flowing granule or a special low-chloride batch—starts with either a request or a field observation, not an R&D brainstorm. We invest less in lobby displays or glossy brochures and more in field trials, process monitoring, and partnerships with practical customers. In the crowded market for iron sulfate, that direct connection to end users separates routine suppliers from true manufacturing operations.

    Facing Challenges Head-On: Addressing Supply and Quality Problems

    Iron sulfate supply swings with global iron and sulfur markets, local weather, and transport swings. At times, raw material scarcity in key regions squeezes prices and availability. As a direct producer, we buffer this by holding longer-term supply agreements and spreading risk across multiple raw input sources—iron filings, pyrite cinders, and selected industrial residues. If suppliers falter, we shift production runs or pull reserve stocks. When ships delay or customs seize unrelated shipments, we have used land routes or expedited local deliveries; keeping manufacturing flexible is key to weathering market shocks.

    Quality threats never go away. Over the years, we tackled adulteration, where imported “ferrous sulfate” arrived in ports laden with salt, sand, or even waste residues. Users unlucky enough to fall for these bargains pay later: feed impounded, crops burned, or water treatment halted by mysterious residues. From our vantage point, the solution stays clear—know your supplier, check the origin, and push for samples and test results, not just certificates. We keep our customers informed of changes, supply risks, and real consequences attached to buying from unknown traders.

    Continuous Improvement: Pushing Our Process and Building Trust

    Every few years, new needs and standards push us to adapt—lower dust formulas, improved solubility, better environmental reporting. These shifts reflect not a marketing chase, but hundreds of hours of field calls, lab tweaks, and feedback from actual users. In response, we have fine-tuned our process: sharper filtration, variable drying, and more real-time monitoring of Fe levels, moisture, and trace contaminants. Our employees, many of whom have worked the line for years, tweak the process and share improvement ideas that come from direct handling.

    Trust follows from consistency. Direct feedback leads to production changes, tighter storage, and fresher shipments. Word of mouth brings us new customers as much as any ad campaign, because the toughest clients—municipal water managers, animal nutritionists, and agronomists—share what they see and demand what works. We provide open results, rapid troubleshooting, and support engineered for the actual pressure points in plant or farm life.

    The iron sulfate industry rewards those who put foot to ground, fix problems as they show up, and never hide behind third-party claims. That’s our position as an actual manufacturer: responsibility for each batch, every time, with transparency backed by evidence and honest labor on the floor. For those who want to see where their iron sulfate comes from—and why it really matters—our doors and sample jars remain open.