Refined Glauber's Salt

    • Product Name: Refined Glauber's Salt
    • Chemical Name (IUPAC): Sodium sulfate decahydrate
    • CAS No.: 7757-82-6
    • Chemical Formula: Na2SO4·10H2O
    • Form/Physical State: White free flowing powder
    • Factroy Site: China Salt Building, Lianhuachi, Guangwai Street, Fengtai District, Beijing, P.R.China
    • Price Inquiry: sales3@liwei-chem.com
    • Manufacturer: China National Salt Industry Corporation
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    Specifications

    HS Code

    453908

    Chemical Name Sodium Sulfate Decahydrate
    Common Name Refined Glauber's Salt
    Chemical Formula Na2SO4·10H2O
    Molecular Weight 322.20 g/mol
    Appearance Colorless, transparent crystals
    Solubility In Water Very soluble
    Melting Point 32.4°C (90.3°F)
    Ph Value Approximately 7 (neutral)
    Odor Odorless
    Density 1.464 g/cm³
    Purity Typically >99%
    Hygroscopic Yes
    Thermal Decomposition Releases water above 32.4°C
    Storage Conditions Keep in a cool, dry place
    Cas Number 7727-73-3

    As an accredited Refined Glauber's Salt factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.

    Packing & Storage
    Packing Packaging features a durable 25 kg white plastic sack, blue labeling, product name "Refined Glauber's Salt," usage instructions, and manufacturer details.
    Container Loading (20′ FCL) Container Loading (20′ FCL): Refined Glauber's Salt packed in 25kg/50kg bags, 27–28 tons per container, moisture-protected, palletized or non-palletized.
    Shipping Refined Glauber's Salt is typically shipped in moisture-proof, sealed bags or drums to prevent caking and contamination. Packages are clearly labeled with chemical identification and handling instructions. During transit, the material is kept dry and secure, conforming to standard chemical transport regulations to ensure safety and product integrity.
    Storage Refined Glauber’s Salt should be stored in a cool, dry, and well-ventilated area away from direct sunlight and sources of moisture. Keep the container tightly closed to prevent clumping and contamination. Store it away from incompatible substances such as strong acids and reducing agents. Use proper labeling and ensure easy access for authorized personnel only to maintain safety and product integrity.
    Shelf Life Refined Glauber's Salt has a shelf life of about 1-2 years when stored in a cool, dry, and sealed container.
    Application of Refined Glauber's Salt

    Purity 99%: Refined Glauber's Salt with 99% purity is used in textile dyeing processes, where it ensures consistent dye fixation and vibrant color development.

    Particle size <500 microns: Refined Glauber's Salt with particle size under 500 microns is used in detergent manufacturing, where it promotes rapid dissolution and homogeneous mixing.

    Melting point 32°C: Refined Glauber's Salt with a melting point of 32°C is used in pulp and paper bleaching, where it enables efficient oxidative bleaching reactions.

    Stability temperature up to 60°C: Refined Glauber's Salt stable up to 60°C is used in leather tanning, where it maintains performance during warm process stages.

    Low water insolubles <0.05%: Refined Glauber's Salt with water insolubles below 0.05% is used in pharmaceutical formulation, where it guarantees high solution clarity and product purity.

    Sulfate content >98%: Refined Glauber's Salt with sulfate content exceeding 98% is used in glass manufacturing, where it minimizes impurities and improves glass transparency.

    Minimum heavy metals <10 ppm: Refined Glauber's Salt with heavy metal content below 10 ppm is used in food processing, where it ensures compliance with safety standards and consumer protection.

    Granular form: Refined Glauber's Salt in granular form is used in cooling bath applications, where it provides controlled dissolution and predictable cooling rates.

    Moisture content <0.2%: Refined Glauber's Salt with moisture content below 0.2% is used in laboratory reagent preparation, where it guarantees accurate concentrations and reliable experimental results.

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    Certification & Compliance
    More Introduction

    Refined Glauber's Salt: An Industry Perspective

    A Closer Look at Refined Glauber’s Salt

    Refined Glauber’s Salt, which chemists know as sodium sulfate decahydrate, holds a special place on the production floor. Our team sees bags of this crystalline product moving through the warehouse daily, destined for clients who already know its value. Unlike basic or unrefined sodium sulfate, our refined grade comes out clean, bright, and with consistent granule size, which means less dust in the air and fewer handling problems. You can spot it by the way it pours: even under humid conditions, it doesn’t clump or cake as much as coarser grades. Every year, field feedback shapes our batch processing, resulting in a material with reliable physical and chemical traits.

    In our own plant, we start with mined sodium sulfate, then pass it through several purification steps. We wash, filter, and recrystallize. Next, we dry it at carefully controlled temperatures, so the product holds its full decahydrate structure—without losing water or picking up impurities. Every ton passes inspections for iron, calcium, and insoluble matter, since even minor contamination affects how it performs in glass, textiles, and other applications. The labs run titration and loss on ignition tests. There are no half measures. By the time the final product ships out, we know each batch will behave exactly as our customers expect.

    Why Model and Specifications Matter

    Our most popular model features high-purity sodium sulfate decahydrate, showing up at 99% content (Na2SO4.10H2O basis) and lower than 0.05% insolubles, backed up by every inspection report. The moisture content remains stable between 44% and 45%. With us, these aren’t just numbers on a sheet; they translate to real performance. In textile dyeing, this purity reduces side reactions. In chemical synthesis, it prevents costly rework. Bulk density, particle size, and flow characteristics all stem from our processing approach, tuned with years of trial and observation. Customers who need low-chloride or low-iron content get precisely that, because they told us uniform batches are the only way to keep their production lines running smoothly.

    Maybe you are running a glass furnace that can’t tolerate high insoluble residues. Maybe your paper plant needs consistent dissolution rate so the process keeps pace, day or night. Feedback cycles from every major industry shaped our internal specs. For example, in the detergent sector, our refined Glauber’s Salt supports free-flowing powder blends thanks to consistent particle morphology. For chemical intermediates, we reduce heavy metal traces below the levels that catalyze unwanted reactions. We know what it takes because our technical staff talks to the site engineers who use these products every day.

    Real-World Usage: Beyond Theory

    In glass manufacturing, workers count on our refined Glauber’s Salt. Every shovel that goes into the mix adjusts the batch chemistry, affecting the final clarity and color of the glass. The low level of organics helps avoid streaking or excess bubbles. When a glass plant in central China started using our refined model, their melt times dropped and their finished sheets improved in transparency—results confirmed by their own QA reports. Similar stories come from dyehouses, where the right grade pulls dyes into the yarn evenly, preventing fade or streak lines. They save water in rinsing since fewer salts return to the effluent. The difference shows up in water test results and on the looms themselves.

    Pulp and paper processors use our refined product to adjust ionic strength during pulping and bleaching. Our high-purity grade means process water stays clearer, pipes clog less, and downstream biological treatment runs more efficiently. Few things slow a paper mill more than scaling caused by mineral residues. Over the years, close work with maintenance engineers taught us that success rests on more than the certificate of analysis. Every batch that leaves the warehouse solves problems on the client’s site, not just “meets” specs.

    The detergent industry depends on pure sodium sulfate to control the consistency and economics of powder formulas. Detergent plants switch to our refined product for smooth blending and dosing, less dust on the filling machines, and fewer product recalls linked to off-spec salt. One customer, a regional detergent producer, halved their maintenance downtime after changing over to our material from generic unrefined salt. Novel uses in modern dishwashing powders and liquid detergents continue to expand, driven by a need for predictable, clean dissolving fillers. The right sodium sulfate base lets formulators focus on performance and fragrance, not trouble-shooting unexpected interactions.

    How Our Refined Glauber’s Salt Differs from Other Products

    A side-by-side comparison between our refined Glauber’s Salt and the crude commodity version tells the story fast. Workers notice the difference at every stage—from storage, to weighing, to adding the salt into mix tanks. Our material stays free-flowing longer and resists caking in humid storerooms. That is no accident. Over twenty years, our operations team experimented with refining and drying settings to optimize the balance between moisture retention and physical stability. Our salt’s uniform crystal habit means less bridging in hoppers and more accurate dosing by feeders. It does not carry the earthy odor or yellow tint some grades show.

    Other forms on the market, especially byproducts of non-dedicated operations, don't always pass muster. They arrive with admixtures of calcium, iron, and sometimes silica grit, reflecting less thorough purification and batch-to-batch variability. Customers who try switching back often face more maintenance, poor washouts, or color streaks in textiles. Chemical producers running continuous-flow reactors can’t afford those kinds of hiccups, so they stay with our refined grade. The difference lies not only in the certificate details but in how the product behaves in the field, under different climates and humidity levels.

    Flake versus granule, decahydrate versus anhydrous—many buyers ask which form works best. Our refined Glauber’s Salt, always a decahydrate, gives superior handling and solution behavior in most major industries. Anhydrous grades pull moisture from the air and can cake even faster during monsoon seasons, especially in coastal warehouses. Their applications differ, and we help customers decide based on their actual process environment. In every case, client feedback loops back to our R&D, guiding minor tweaks in the refining sequence to improve performance.

    Refined Quality: A Story Built with Every Batch

    Quality does not start on the production line but with local fieldwork. Our technicians sample raw material from multiple deposits to secure the right base purity. No two runs are identical; slight seasonal shifts affect water composition, and upstream suppliers change mining practices. In response, our lab checks every incoming shipment before committing it to processing. Only high-grade mineral stocks will do—there is no shortcut. The soda process works best when each batch starts with a narrow impurity profile. Every time we deviate, even slightly, mechanical and chemical problems multiply downstream.

    Inside the plant, operators bring experience as much as training. They notice changes in crystal habit as temperatures swing. Over years, small refinements to our filtration and drying routine fixed issues like excessive dust or sticky final product. None of these adjustments gets written into textbooks; it’s the result of long hours learning what works on the ground. We run batch samples through side-by-side customer processes, watching for minor variances that might mess up final product quality, then feed these lessons back into process control. Our R&D team keeps logs so improvements don’t slip through the cracks.

    Even with robust controls, occasional outlier batches remind us never to ease up. Iron or calcium blips—sometimes traceable to tank lining wear or a temporary filter flaw—lead to immediate corrective work. Over time, those corrective actions grow into prevention, so subsequent material leaves us a little better each year. Real experience, built from customer input and field support, pushes the bar higher than any baseline spec. All these efforts deliver visible, measurable differences in performance for users turning out glass, textiles, paper, or chemical intermediates.

    Trust and Traceability: Meeting Modern Expectations

    Today, major customers want more than technical specs—they demand traceability back to source, proof of environmental management, and clear answers to any process question. Our records track every shipment by batch, lab report, source mine, and handling conditions. In recent years, environmental audits get stricter, and rightly so. Waste brines from washing and purification can threaten local waterways if mismanaged. Our internal water treatment keeps plant outflows below regulatory targets, and published reports make sure downstream users can answer their own auditors confidently.

    Health and safety are non-negotiable on our floor and at client sites. Our materials ship with transparent composition reports, letting buyers match incoming product to their process needs. When requests for allergen, heavy metal, or other trace impurity data arrive, support teams respond with real-time sample tests—not generic statements. The chain of custody system rolls back years, so users with specialty audits (like food or pharma) have confidence in supply chain security. Our willingness to answer hard questions and provide test runs cements partnerships over decades, not months.

    Clients indicate that open reporting builds trust, especially as quality claims grow more ambitious across the market. Most who visit our plant notice visual cleanliness, clear storage rules, and detailed logs at every handoff. Our staff keeps up-to-date with new standards, and we’ve altered processes to meet fresh industry guidelines. For clients in Europe and North America, we routinely provide documentation on everything from Reach and RoHS to ISO-based environmental protocols. Those extra steps anchor us as a reliable, long-term partner—especially when disruptions elsewhere send buyers scrambling for alternatives.

    Challenges in Manufacturing, Shipping, and Customer Use

    One of the biggest challenges we face is humidity—both in our plant and through the logistics chain. Sodium sulfate decahydrate loves to hold water, so warehouses remain cool and dry. Bulk packaging shifts, especially during damp monsoon periods, trigger our inspection teams to double-check for caking or lumpiness. It’s not a glamorous detail, but we lose no sleep over a returned pallet if it means avoiding contamination or degraded performance. We regularly ship with extra wrapping or reinforced bags—ideas picked up from watching customers struggle with storage in coastal or tropical regions.

    Purity remains the never-ending race. As customers push for finer controls (no detectable chlorine or heavy metals), our lab crews stay ahead with new detection tech and longer testing runs. Some years, evolving industry standards force rapid change in refining sequence or new filtration systems. Not every new solution works out. A few years back, a promising new drier made product dusty; that tweak got rolled back after one production run. Failures become lessons, and the cycle of improvement keeps us facing the market with confidence.

    On the customer side, blending issues sometimes come down to storage conditions rather than product quality. We don’t lecture—site visits help solve these problems on the ground. In glass or paper plants with ongoing issues, we offer on-site training to operators. Changing a storage rack layout, adding simple covers, or adjusting hopper angles make a bigger difference than adding complexity to our production. Our own people learn from every call-out, then roll fixes back into shipment instructions for other users.

    Sustainable Production and Industry Responsibility

    Markets keep buyers on their toes; sustainability demands keep us just as alert. As demand for refined Glauber’s Salt rises, our factory invests in improved water recycling loops and lower-emission fuel sources. A few plants still vent brine; our setup recovers it for secondary use in on-site cleaning and dust suppression. Animal testing and hazardous chemical discharges no longer play a role; regulations have advanced and so has our own company ethos. New sodium reduction initiatives in the detergent world ripple backward to us, as customers demand efficient fillers without unnecessary environmental baggage.

    Our team knows that social trust shrinks fast with any shortcut. Our site runs environmental audits not just because legal frameworks demand it, but also because employees live in nearby towns—it matters whose water and air we affect. We adapt to stricter emission control targets every year, and share best practices with competing firms to keep the broader industry safe. On large public contracts, full disclosure becomes the norm, with government and NGO audits keeping us accountable in ways that only formal oversight can achieve. These expectations make us better every year, and force us to think ahead on waste management, energy use, and sourcing transparency.

    Continuous Feedback: Improving Every Step

    Constant improvement marks all aspects of refined Glauber's Salt production. We challenge our own past assumptions with every batch we make, spurred on by user feedback, market shifts, and new regulatory guidelines. Staff training never stops—maintenance teams learn to spot developing issues before they slow production, and routine audits keep every worker sharp on quality protocols. R&D runs pilot trials well before production shifts hit full scale, balancing the need for innovation with the reality of market demands.

    Supply chain disruptions and customer restocking delays sometimes expose gaps in logistics. We handle those as lessons. After several key clients flagged supply delays during a shipping backlog, we added new backup warehouse space and diversified our logistics partners to keep deliveries on time even during peak seasons. Transparency keeps relationships healthy; clients never want to hear excuses, they want to hear concrete plans and timely updates.

    In the end, our day-to-day business revolves around real needs, real feedback, and a personal stake in turning out refined Glauber’s Salt that works as expected. Every change, whether it's an internal process shift or a reaction to a market trend, draws directly from hands-on experience—ours and our customers’. The trust that comes from knowing your supplier sweats the details, just like your own production staff, outweighs any minor price or delivery differences. Year in, year out, that commitment shapes our product, our plant, and our place in the industry.