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HS Code |
157292 |
| Chemical Name | Calcium Arsenate |
| Chemical Formula | Ca3(AsO4)2 |
| Molecular Weight | 398.07 g/mol |
| Appearance | White powder |
| Solubility In Water | Slightly soluble |
| Density | 3.62 g/cm³ |
| Odor | Odorless |
| Toxicity | Highly toxic |
| Cas Number | 7778-44-1 |
As an accredited Calcium Arsenate factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | The packaging is a sturdy, white 25 kg bag, clearly labeled “Calcium Arsenate,” with hazard symbols and handling instructions prominently displayed. |
| Shipping | Calcium Arsenate is shipped as a hazardous material in tightly sealed, corrosion-resistant containers. It must be clearly labeled, protected from moisture, and kept away from food and incompatible substances. Transport follows strict regulations for toxic substances, ensuring compliance with all local, national, and international safety and environmental guidelines during handling and transit. |
| Storage | Calcium arsenate should be stored in a cool, dry, well-ventilated area away from food, feed, and incompatible substances such as acids and strong oxidizers. Store in tightly closed, labeled containers made of materials resistant to corrosion. Protect from physical damage, moisture, and direct sunlight. Access should be restricted to trained personnel, and spill containment measures should be in place. |
Applications of Calcium Arsenate in Industrial ManufacturingAs a direct producer of Calcium Arsenate, we supply this specialized chemical raw material to multiple established downstream industries. Below we define principal application scenarios based on our clients’ procurement requirements, normalized process integration, and regulatory contexts. 1. Crop Protection Formulations for Industrial AgricultureMajor agrochemical companies employ Calcium Arsenate in the synthesis of non-organic arsenical insecticides, particularly for cotton, tobacco, and fruit crops. It functions as a primary active ingredient in dust and granular products deployed to suppress boll weevils, leaf-eating insects, and certain soil-dwelling pests. High toxicity mandates advanced blending strategies and controlled application supported by dust suppression techniques and precise equipment calibration. Compliance demands accurate batch records, certified operator safety training, and dedicated handling zones for neoplastic dust control. Industry compliance standards
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2. Non-Wood Preservation and Timber Industry TreatmentsIndustrial timber operations utilize Calcium Arsenate to impregnate lumber and railroad ties to prevent attack from marine borers, fungi, and termites. It forms an inorganic barrier layer when pressure-injected or surface-sprayed, extending the life of wood under ambient or high-moisture environments. Integrators tightly monitor solution strength and reactivity to wood types, ensuring even distribution and minimum leaching risk. Personnel must receive specialized PPE training due to chronic toxicity hazards during dipping and post-treatment curing. Industry compliance standards
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3. Glass and Enamel ManufacturingThe specialty glass and ceramic sectors incorporate Calcium Arsenate as a clarifying agent and colorant modifier during melting operations. Its controlled addition to molten glass assists in decolorization by oxidizing dissolved iron, improving clarity in container glass, tableware, and laboratory vials. It also serves niche roles in frit and enamel pigment preps, modifying glaze color and opacity. Operators maintain tight feed rates and ensure full melt dissolution to control arsenic volatilization and downstream fume capture. Industry compliance standards
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4. Rodenticide and Biocide Production for Structural Pest ControlChemical processors utilize Calcium Arsenate in formulation of rodenticidal baits and certain legacy biocidal products for grain storage, warehouse, and public health use. Compounding labs integrate it as a toxicant into food-based or inert carrier substrates, producing pellets, tracking powders, and scatter baits. Formulation specialists calibrate dosage based on target species, toxicity control banding, and site exposure restrictions. Strict supply chain controls and batch validation ensure end-use traceability and operator safety. Industry compliance standards
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5. Non-Ferrous Metallurgical Ore Processing AidSelected hydrometallurgical and pyrometallurgical plants apply Calcium Arsenate for arsenic immobilization during ore roasting and smelting of copper, gold, and lead concentrates. By addition to clinker coolers or soda-ash leaching circuits, it precipitates dissolved arsenic, forming stable residues suitable for controlled disposal. Process supervisors adjust dosing to match ore chemistry and throughput, maintaining emission below regulatory thresholds. Automated feeding and residue sampling assure consistent contaminant immobilization and plant workplace safety. Industry compliance standards
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Producing calcium arsenate involves a close focus on consistent quality, safety, and meeting the needs of the industries that trust this compound. Over years of handling raw arsenic materials, balancing reaction conditions, and processing each batch under controlled environments, we have come to understand both the promise and the challenges of this product in large-scale applications.
In the manufacturing plant, calcium arsenate usually comes out as a white powder, sometimes tinged with a slight gray cast depending on the grade of input arsenic. The most widely used specification falls in the range of 38–41% arsenic pentoxide by weight—any less and the pesticide strength dips; any more and solubility problems start to creep in for some end-users. Our typical batches are carefully dried to low moisture content and milled to fine particle sizes, where most of the material passes through a 325-mesh screen. Getting that fine texture requires multiple passes and constant attention to air flow, dust suppression, and keeping the entire operation closed-off to prevent environmental release.
We get frequent questions from farmers, orchardists, and even historical restoration groups about why someone would choose calcium arsenate over more modern compounds. Once, arsenic chemicals were the backbone of agricultural pest control. Calcium arsenate proved especially important after the devastation of early weevil outbreaks in Southern cotton fields—a crisis that spurred our own plant’s growth nearly a century ago. Several factors kept this compound in favor, particularly for crops where resistance to organophosphates or organochlorines had built up.
Unlike sodium arsenate or lead arsenate, the calcium salt clings tight to plant surfaces with relatively low solubility in rainwater, making it persistent for field use. A single application could deter insects for weeks rather than just days. We mix it on-site to maintain a neutral pH, avoiding the harsh acidity found in some arsenic solutions. This lets growers treat sensitive crops with more control and less risk of burning leaves, especially in humid climates where foliage damage can trigger secondary disease outbreaks. That balance between effectiveness and crop safety stands out as a mark of our manufacturing expertise.
Compared to other arsenic-based powders, calcium arsenate’s granular stability is something we refine batch by batch. We use a dry blending process that reduces the risk of caking in tanks or hoppers. The end product pours evenly and blends easily into tank mixes. Field teams tell us they get a more predictable suspension when mixing by hand, which matters a lot in more remote growing regions lacking agitators or modern spray rigs. Unlike lead arsenate, our calcium arsenate leaves less visible residue and rinses more cleanly from spray equipment, reducing the risk of carry-over contamination to subsequent uses.
Handling arsenic in raw form remains one of the biggest responsibilities for any chemical production company. Our plant’s oldest operators can recall the days when dust control was nearly impossible and respirators were an afterthought. Now, we run modern filtration and recovery systems, with airlock entry, full protective equipment, and engineering controls at each stage of the process. Keeping silica content low in the final product lessens inhalation risk during application, and we conduct weekly air sampling throughout the facility.
Our analyst team pays close attention to batch purity, particularly because the primary ores used for arsenic extraction can vary dramatically in trace metals and unwanted byproducts such as iron or lead. Years of data show that even minor impurity spikes in the calcining stage can throw off product consistency. As a manufacturer, we don’t simply aim for minimum compliance—we track shifts in ore sources, log every output for heavy metals, and communicate results toward both regulatory authorities and our major clients.
Decades ago, calcium arsenate stood at the center of American cotton farming and orchard pest management. We used to ship railcars of it out every spring to growers waiting on the beginning of boll weevil season. Today, demand is nothing like what it once was, but for certain scenarios—especially in older tree crop operations or where other chemistries have failed—customers still come directly to us, looking for formulations that work, sometimes seeking data from field trials we conducted as far back as the 1960s.
There exists a misconception that all arsenic pesticides act interchangeably. Direct manufacturing experience shows very clear differences in handling, shelf life, and reactivity with other sprays. Some copper-arsenic blends, for instance, have a tendency to settle out or precipitate unpredictably under field conditions. By refining purity and controlling particle fineness, we help our customers avoid clogging or uneven distribution, especially in older equipment still in use in parts of the world.
The shift away from arsenical pesticides has changed the landscape for everyone in this space. Most regions now require strict labeling, worker protections, and reporting whenever calcium arsenate is manufactured or sold. We produce all documentation for regulators, track every shipment, and maintain chain-of-custody logs for every drum leaving our site. No buyer receives product without a record of training in safe use and containment, and every year, new amendments or legal requirements prompt updates to how we formulate, pack, and ship.
Regulations for allowable residues on food crops have tightened. Old formulation sheets, once cobbled together locally, now get cross-checked against international standards. Part of our ongoing job involves working with crop scientists and industry panels to review safe-level data, update our mixing protocols, and look for safe alternatives for every customer whenever new science suggests a change is needed. Where permitted, our calcium arsenate moves only to licensed professionals, for whom we provide ongoing compliance support.
Inside our production line, each batch of calcium arsenate starts out from an arsenopyrite or arsenolite source. High-temperature treatment with lime yields the primary product, afterwards cooled, screened, and packaged in moisture-tight drums. Common outputs reflect an As2O5 content of 39.5–41%, with free lime strictly limited to below 2% by weight. Free-flowing texture supports manual and mechanical dosing, a point of pride for our mixing operators.
We also take steps to minimize trace impurities. Detailed screening before packaging ensures that both particle size and chemical composition line up with customer requirements. Laboratory technicians check for less than 0.01% lead content, ensuring clear separation from products like lead arsenate, which fell out of favor due to environmental persistence and historic soil buildup around orchards. Our calcium arsenate leaves behind fewer residues when washed from leaves or fruit—something we monitor through frequent interaction with third-party labs and in-house field trials.
People often ask how calcium arsenate differs from similar choices—sodium arsenate and lead arsenate, especially. Based on both chemistry and field reports, sodium versions dissolve quickly in water and pose a greater risk of run-off and wash-away. Calcium arsenate’s lower solubility keeps it available to deter pests without rapid loss from rainfall or irrigation. Lead arsenate, long criticized for soil contamination, carries heavier baggage in long-term orchard health. Our product avoids these drawbacks, offering a balance between residual effect and manageable risk.
Industrial users sometimes request technical clarifications, especially for historical wood preservation, glasswork, or pigment applications. In glass and ceramics, control of heavy metal content and fine particle texture make a difference—sloppy supply results in patchy colors or defects. Years of back-and-forth with technical managers let us refine our output for these non-farm uses, customizing calcium and arsenate content within set tolerances so results stay predictable in finished goods. This isn’t something easily found from non-specialist providers.
We have gained practical knowledge about the limitations of continued use. Calcium arsenate will never be a fit in every situation, and responsible production means honest dialogue about these limitations. Overapplication can easily lead to persistent arsenic residues in soils, with potential for groundwater impact if not monitored carefully. Our agricultural clients receive detailed guidance on skip-row spraying, buffer zones, and post-application monitoring. We collaborate with extension agents and field researchers to help assess soil movement and degradation, especially in sandy or acidic soils where mobility increases.
Disposal of residual material, empty packaging, or expired stock demands dedicated handling procedures. Every drum comes with clear storage and disposal notes. As a plant operator, keeping trace arsenic out of stormwater and soil during all handling steps ranks high on our audit priorities. Years back, accidents from poor disposal tarnished not just company images but entire communities. Safeguarding against repeat incidents shapes nearly every decision at the processor and shipper level.
A focus on dust control marks the most important recent shift in production. Baghouse systems, air curtain loading bays, and mist-suppression at every transfer point now standardize every shift. Workers rotate tasks at regular intervals, monitored for cumulative exposure. We invest continuously in new ventilation, personal monitoring, and remote sampling for arsenic vapor levels, especially during summer when heat stirs up fine particles. Upgrading these systems reduced reported dust exposure levels below targeted occupational thresholds.
Wet process innovations also advanced the safety profile of calcium arsenate. Recent investments in semi-automated slurry mixing let us produce on-demand micronized blends for certain specialty users, reducing airborne fines and increasing mixing consistency at the point of application. Our R&D team works with equipment suppliers to improve the sealed nature of dry powder transfer, cutting back external contamination risk.
Staying in the calcium arsenate business after so many changes in regulation, market demand, and agricultural practice speaks to a commitment to responsible chemical stewardship. The days of bulk, unrestricted distribution have passed. Manufacturers focus more on supporting existing users with training, precise dosing recommendations, and regular safety reviews. Our sales and technical support teams spend far more time in the field than behind desks, keeping tabs on environmental outcomes and gathering firsthand feedback from users in every segment.
For newer generations of farmers, orchard managers, and maintenance professionals, education about historical use and present-day limitations stands as a core duty. We sponsor workshops, communicate openly about legacy arsenic issues, and work with local authorities on remediation where misuse or old disposal practices left a footprint. Collaboration with university researchers brings in new data about safe handling, soil persistence, and paths toward alternatives—with shared results feeding back into how future batches are formulated and distributed.
While calcium arsenate no longer sits at the center of mainstream chemical farming, real needs still arise that demand experience, transparency, and a willingness to adapt to local circumstances. Responsible manufacturing starts with rigorous upstream control, passes through rigorous quality assurance, and ends with knowledge shared as freely as the product itself. Our commitment goes beyond producing a commodity; it means maintaining vigilance in safety, compliance, and sustainable use—because the margin for error with an arsenic compound remains slim, and public trust depends on every step working as it should.
Running an arsenic chemical plant teaches lessons in humility, technical rigor, and respect for both history and change. Calcium arsenate remains a specialized option where proven effectiveness and field familiarity are critical. The best results depend on careful sourcing, refining, and ongoing dialogue with the industries that still rely on it. Our plant’s approach brings together tradition and innovation—never losing sight of the core responsibility: providing a product that works without losing sight of safety, ethics, and the shared land on which we all depend.
