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HS Code |
364879 |
| Chemical Name | Lead Sulfate [Free Acid >3%] |
| Cas Number | 7446-14-2 |
| Formula | PbSO4 |
| Molecular Weight | 303.26 g/mol |
| Appearance | White to off-white powder |
| Free Acid Content | >3% |
| Solubility In Water | Insoluble |
| Density | 6.29 g/cm³ |
| Melting Point | 1170 °C (decomposes) |
| Main Hazard | Toxic if swallowed or inhaled |
| Storage Conditions | Store in a cool, dry place away from incompatible substances |
| Ph Value | < 1 (in aqueous suspension due to free acid) |
| Odor | Odorless |
| Stability | Stable under recommended conditions |
As an accredited Lead Sulfate [Free Acid >3%] factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Lead Sulfate [Free Acid >3%], 25 kg net, packed in sealed, labeled HDPE drum with hazardous chemical warning and handling instructions. |
| Shipping | Shipping of Lead Sulfate [Free Acid >3%] requires secure, corrosion-resistant containers with leak-proof seals. Packaging must comply with hazardous materials regulations, including appropriate chemical labeling. Transport is restricted to authorized carriers, with measures in place to prevent spills and exposure. Emergency spill containment and safety documentation must accompany each shipment. |
| Storage | Lead Sulfate [Free Acid >3%] should be stored in a cool, dry, well-ventilated area away from incompatible materials such as strong bases and oxidizers. Use corrosion-resistant, tightly sealed containers clearly labeled with hazard information. Prevent contact with moisture, ignition sources, and acids. Ensure secondary containment to manage spills, and restrict access to trained personnel wearing appropriate PPE. |
Applications of Lead Sulfate [Free Acid >3%] in Industrial ManufacturingOur lead sulfate with controlled free acid content over 3% is engineered for precision in downstream formulations where strict process requirements govern product reliability and regulatory compliance. We detail major application fields below, based on our factory’s direct supply experience for international OEMs and end-manufacturers. 1. Active Material for Lead-Acid Battery PlatesManufacturers in the battery sector employ our material as a core precursor in forming active mass for both positive and negative plates in automotive SLI, backup power, and industrial traction cells. The high free acid contributes to ease of slurry mixing and controlled paste structure, influencing crystallinity during curing and formation steps, which affects discharge performance and cycle durability. This grade allows stable paste viscosity during high-speed automated plate production. Industry compliance standards
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2. Intermediate in PVC Heat Stabilizer ManufactureOur sulfate acts as a source of controlled lead ions in the production of tribasic and dibasic lead-based heat stabilizers for rigid and flexible PVC extrusion lines. The free acid ensures efficient conversion and high-purity downstream conversion reactions, supporting consistent batch yields. Lead stabilizers derived from this route maintain thermal color stability and balance degradation kinetics in cable insulation and window profile production. Industry compliance standards
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3. Pigment Feedstock in Inorganic Color ManufacturingProducers of lead-based pigments, such as chrome yellows and molybdate oranges, specify this grade of our product for its purity profile and controlled free acid, which supports precise precipitate particle control and filtration characteristics. The sulfate base yields distinct advantages in pigmentary yield and tinting strength for robust coating and plastic masterbatch applications requiring intense color saturation and lightfastness. Industry compliance standards
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4. Electrolyte Conditioning Agent in Mining FlotationMining concentrate operations utilize our free-acid-enhanced grade for pre-conditioning flotation slurries, where it aids in the selective depression of iron sulfide minerals relative to galena and other valuable lead minerals. Its acid value supports optimal pH adjustment, which can reduce unwanted surface oxide formation and boost concentrate yield during froth separation. Precise dosing provides balance between selectivity and process throughput in mineral beneficiation plants. Industry compliance standards
Typical usage ratio
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5. Laboratory Standard and Calibration Reagent ProductionProducers of certified laboratory reagents purchase our high free-acid grade for matrix standards and volumetric calibration solutions in spectrometric lead analysis and certified reference material production. Our controlled content aids in minimizing background contamination, allowing precise manufacture of stock standards for regulatory quality assurance, inter-lab proficiency testing, and analytical method development targeting lead quantification. Industry compliance standards
Typical usage ratio
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Working every day in our plant means handling chemicals that find their way into industries and products most people never see. One substance we make with special care is Lead Sulfate with free acid content above 3%. Offering it as Model: LSFA-03 gives our industry partners reliability and process flexibility. Decades of experience in wet-process chemistry have taught us how finicky lead salts can be. Even small shifts in process change the way the product behaves later. That’s especially true with free acid content—three percent or more delivers something different.
Raw Lead Sulfate on its own is recognized for its use as a pigment base and as a component in battery manufacturing, especially for lead-acid batteries. Many plants treat Lead Sulfate as a basic, stable material, often pursued for purity and consistency across batches. But some advanced users require higher free acid levels to tweak how Lead Sulfate reacts in further processes. We’ve learned that maintaining free acid above 3% affects solubility, reactivity, and downstream mixing―particularly useful in battery paste formation and certain ceramic industries.
From early days making small batches, we realized not every customer wants the same balance of acid residue. Some need low-acid grades to avoid corrosion, but others want enough acid to keep materials workable and suspendable during manufacturing. So our line was built around both general and high-acid products, and over the years, we’ve refined our separation, washing, and filtration to meet the tough demands for Lead Sulfate Free Acid >3%.
Our technical team sticks to a rigorous wet precipitation process for this model, using lead and sulfuric acid as inputs. Meticulous control over reactant ratios and wash steps gives us a solid, finely crystalline Lead Sulfate product. By holding the free acid firmly above 3%, we guarantee a model trusted for slurry stability, predictable viscosity, and distinct reactivity when introduced to other additives.
During filtration and drying, we check every lot for moisture, acidity, and crystal shape. Hydration levels stay tightly controlled, which gives dense, flowable powder without agglomeration issues that can ruin high-precision blends. Many battery and pigment plants report smoother paste mixing and more predictable curing when using our model, over standard low-acid types.
Lead Sulfate with elevated free acid content finds strong demand in traditional battery electrode manufacturing. In paste mixing, slight acidity in the powder gives operators more time to work the blend, keeping viscosity suitable and ensuring finer particle binding. Factories scaling up production often comment how the LSFA-03 model resists dry-out and lump formation, especially compared to low-acid or neutralized grades. Curing cycles can be tailored more accurately, and the danger of “hard” spots in the grid is reduced.
Ceramics is another field that finds value in this product. Specialty tile and glaze producers rely on specific lead compounds for color, opacity, and chemical durability. When high free acid levels are present, suspensions stay workable longer, and the mixing of additional oxides or modifiers runs more smoothly. Waste reduction climbs, because less material sticks to mixer blades and dries prematurely. Those switching from standard lead sulfates to our >3% acid grade usually notice less downtime and faster cleanup after each batch.
Laboratory chemistry doesn’t always predict what happens inside production reactors running around the clock. In our plant, process engineers remember how early batches turned out lumpy or inconsistent unless reaction steps got constant attention. Over time we learned how the profile of free acid changes as the reaction completes and found that simple tweaks with water or air flows changed downstream usability.
Handling Lead Sulfate with extended free acid content takes experienced operators—raw chemical handling, correct pH monitoring, and sharp filtration discipline. Experience taught us short-cuts don’t pay. Customers investing in high-value battery grids or electronic ceramics know how a minor impurity or excess base can cost real money due to defective runs. We respond quickly on the ground. If a batch even hints at excess variation or clumping, QC inspectors stop the line and communicate with our process engineers. No product leaves the plant until it matches agreed standards.
Again and again, partners across different regions share the same story: prior batches from other sources cause mixing headaches and unpredictable paste textures. After switching to our higher-acid grade, mixes behave more like the lab data predicts, and downstream reactions give more consistent technical results. We rely on continual feedback, not just internal tests, and use suggestions straight from factories to fine-tune process parameters.
Operating at the manufacturing level, we see the full range of Lead Sulfate products, from neutral-washed pigment grades to ultra-pure battery powders. Some partners request almost zero acid residue to cut corrosion risks and simplify waste handling. In those cases, products get additional neutralization and water-intensive washing, costing more to make and ship. Most general grades fall between 0.5% and 1.5% free acid, which suits broad use but doesn’t offer unique handling or mixing benefits.
Our LSFA-03 offers enough acidity to drive more active chemical roles without tipping into the challenges of corrosive slurries. This balance comes from years of tuning not only the main reaction but also the timing and thoroughness of post-precipitation washes. For formulation specialists relying on precise process controls, knowing acid level stays above 3% provides an extra layer of predictability, crucial for timed curing, solvation, and other steps where millisecond-scale reactivity matters.
Distinct from commodity grades, high-acid Lead Sulfate achieves better dispersibility, smoother integration of reinforcing fillers, and reliable wetting during mixing. Standard grades, on the other hand, often leave behind dry flakes and harder clumps that need additional reworking—costing time, money, and sometimes affecting end properties.
Experience has taught our team that handling high-acid Lead Sulfate isn’t just about getting the chemistry right but also about keeping safety and long-term batch performance front and center. Over the years, we invested in dust extraction, safe storage, and corrosion-resistant packaging to make sure the product arrives ready-to-use and stable. Factory teams receiving our product talk about reduced caking and less trouble with hopper blockages, especially in high-humidity areas.
We support full open communication with partners on long-term storage, safe loading, and how to adjust handling procedures for the free acid content. Operators appreciate that we’re willing to share the small details—right down to ideal loading times or storage temperatures—gained after watching tens of thousands of tons move through real-world supply chains.
Unpredictable supply chains and tightening quality expectations in global lead chemicals make a reliable Lead Sulfate source important. We’ve kept emergency buffer stock and flexible logistics capacity for years, learning to respond during strikes, floods, or sudden swings in battery demand. Partners often approach us after getting inconsistent supplies from traders or overseas resellers; they notice the difference that steady delivery and data-backed consistency make.
Some manufacturers face unexpected quality trouble, such as poor battery paste curing or ceramic glaze separation. By offering both chemical guidance and supply flexibility, we help them identify if a higher free acid variant solves the issue. No batch ships from our plant without double-confirming spec, not just a literature value. We keep historical trend data for every production run so if something changes, our engineering and production teams can track the cause and offer remedies or adjusted blends. This kind of hands-on service grows from hard-won experience rather than generic technical promises.
Nothing compares with raw chemical manufacturing for exposing weaknesses in process control. Small plant changes, new feedstock, or tweaks to filtration always risk changing the end product. We run regular full-batch assays for particle size, acidity, and trace impurities. Each new lot gets tested for its downstream handling, including slurry formation and paste mixing under conditions reported by major battery and tile plants.
Results get tracked against customer feedback. If a blender in Asia reports a sudden clumping problem, our QC lab and field engineer pull recent retention samples and analyze trace variables. Sometimes, as quality managers will agree, the challenge comes not from headline specs but from how the free acid interacts with trace metals or humidity during storage. We actively partner with users to eliminate process upsets instead of just pushing out spec sheets.
Plants choosing our free acid grade value the hands-on tracking and on-site troubleshooting we bring to relationships. One change in drying rate or a shift in reaction endpoint can ripple through a supply chain. Only by following every batch from reactor to warehouse do we keep product performance steady.
Every industry handles mixing and conversion differently. In the battery sector, our higher-acid grade often goes straight into paste mixing. Operators see longer working times and fewer lumps, even on automated lines that run hour after hour. Reduced dry-out translates to smoother setup and higher finished plate quality. Ceramic specialists apply the powder to achieve consistent dispersion without fighting premature thickening―saving on process additives and reducing rejected pieces.
We frequently work with R&D teams testing new electrode formulas or seeking longer shelf life for pre-mixed pastes. Sharing data and lessons, we help pinpoint where extra acid content solves technical blocks, letting them fine-tune new blends. We’re not afraid of discussing batch failures—or the ugly outcomes of poorly-managed acid levels. Several customers who once struggled with low conversion rates or unpredictable paste hardening have shifted to our high-acid grade and reported improved first-pass yields without extensive process overhauls.
Lead-bearing chemicals need respect at every stage, from sourcing to storage. We operate inside a framework of strict emission controls, effluent permissions, and dust capture. Our filtration and residue handling reflect not theory but years of adapting to new rules and community feedback. Washing steps designed for retaining high free acid require careful rinse water treatment and controlled discharge—an operation we monitor with in-house labs before any water leaves the site.
We regularly audit raw material suppliers to push for lower-impurity lead sources. If a material doesn’t meet threshold for heavy metals or radioactivity, we reject entire shipments rather than compromising our partners’ process stability. Over the last decade, investments in energy efficiency, water recycling, and dust abatement have kept the plant within tightening waste and emissions limits. We see environmental compliance not as overhead but as stability for our own workers and global partners.
Experience on the work floor never stands alone. We track new research on lead chemistry, process optimization, and industry standards. Relationships with universities and technical institutes open channels for new analytic methods and safety approaches. Our technicians spend as much time on continuous learning as on day-to-day output, making sure practices evolve with global trends and best evidence.
By backing every shipment with documented laboratory testing—mass balance, water content, particle analysis—our partners stay ahead of regulatory requests and customer audits. As standards in automotive, energy storage, and ceramic technologies get stricter, our experience as direct manufacturers makes adaptation more reliable and quick.
Manufacturing Lead Sulfate with free acid above 3% pushes us to balance tough chemistry, practical production, and real-world user demands. We constantly scan for the next wave of energy storage and advanced ceramics that could shift Lead Sulfate requirements. Feedback from technical teams and factory operators translates into process modifications—sometimes subtle, sometimes fundamental—ensuring this product remains both practical and scientifically robust.
We believe that only direct, long-term engagement with partner plants and research groups delivers the kind of reliable, adaptable chemical supply needed for demanding industries. Each batch reflects lessons learned the hard way from round-the-clock operations, hands-on problem-solving, and honest dialogue across the supply chain.
Those wanting to improve process consistency, solve technical blockages, or simply stabilize their production find in Lead Sulfate [Free Acid >3%] not just a commodity, but the outcome of real experience—ready for use, reliable in the field, and underpinned by a commitment to quality that never stops evolving.