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Metarsenic Acid

    • Product Name Metarsenic Acid
    • Alias Arsenic acid
    • Einecs 237-255-8
    • 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

    709810

    Cas Number 7784-39-8
    Molecular Formula H3AsO4
    Molar Mass 141.94 g/mol
    Appearance White, crystalline solid
    Solubility In Water Very soluble
    Melting Point 60 °C (decomposes)
    Density 2.50 g/cm³
    Odor Odorless
    Ph Acidic in solution
    Iupac Name Trihydroxyarsenic
    Synonyms Arsenic acid, Trihydroxyarsenate(V)
    Boiling Point Decomposes before boiling
    Toxicity Highly toxic
    Stability Stable under normal conditions

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

    Packing & Storage
    Packing Metarsenic Acid is packaged in a tightly sealed, 500g amber glass bottle with hazard labeling, ensuring safe storage and transport.
    Shipping Metarsenic acid should be shipped as a hazardous material, complying with all relevant regulations such as DOT, IATA, and IMDG guidelines. Use corrosion-resistant containers, clearly labeled with appropriate hazard warnings. Ensure containers are tightly sealed and transported upright. Personnel handling shipments must have proper training in hazardous material handling and emergency response.
    Storage Metarsenic acid should be stored in a tightly sealed container, away from moisture, heat, and direct sunlight. The storage area should be cool, dry, well-ventilated, and equipped with materials resistant to corrosion. It must be kept separate from incompatible substances such as organic materials and reducing agents. Properly label containers and ensure restricted access to trained personnel only.
    Application of Metarsenic Acid

    Applications of Metarsenic Acid in Industrial Manufacturing

    Metarsenic acid serves as a key chemical intermediate in several industrial processes, supporting critical functions in metal treatment, glass and ceramic coloration, wood preservation, and agricultural chemical manufacturing. As a direct manufacturer, we supply material conforming to stringent regulatory requirements and collaborate with downstream partners for efficient integration into established production lines.

    1. Glass and Ceramic Pigmentation

    Ceramic and specialty glass producers use metarsenic acid as a colorant to achieve specific hues and opacity. Its controlled oxidation properties help stabilize colored ions and introduce vibrant tones to tableware, tiles, and art glass. The strict regulation of trace contaminants is essential due to the end use in food-contact items and luxury goods. Formulators determine dosage based on target shade and matrix composition, requiring precise calculation for batch consistency.

    Industry compliance standards

    • EN 1388-1:2000 — Release of chemicals from ceramic ware
    • FDA 21 CFR 175.300 — Resinous and polymeric coatings (for glazed ceramics)
    • ASTM C1036-16 — Standard specification for flat glass
    • ISO 6486-1 — Ceramic ware release levels

    Typical usage ratio

    • 0.02%–0.1% by total batch weight; formulation adjusted by base glaze content and target chromatic effect

    Downstream process integration

    • Direct blending with other metal oxides and glass frits before melting step in glass/ceramics kilns
    • Introduction during ball milling phase for paintable ceramic slips

    Final product types

    • Colored art glass sheets
    • Decorative ceramic tiles
    • Food-contact dinnerware and cookware glazes
    • Stained glass elements for architectural applications

    2. Wood Preservation Formulations

    Wood treatment facilities employ metarsenic acid as a micro-biocidal additive in the formulation of waterborne wood preservatives. Its primary function is to inhibit fungal and insect attack on outdoor timbers, utility poles, and structural lumber. Regulatory oversight restricts dosage and mandates residual analysis throughout the treatment process to ensure leaching rates comply with environmental safety norms.

    Industry compliance standards

    • EPA 40 CFR Part 761 — Polychlorinated biphenyls (applicability for treated lumber disposal)
    • AWPA P23: Standards for Wood Preservative Formulation
    • EN 351-1: Durability of wood and wood-based products
    • ISO 21887: 2007 — Performance of preservatives in field tests

    Typical usage ratio

    • 0.15%–0.45% w/w, depending on timber species, cross-section, and required hazard class

    Downstream process integration

    • Addition to treatment solution tanks for vacuum-pressure impregnation
    • Metered dosing during batch preparation for hot-and-cold bath preservatives

    Final product types

    • Outdoor decking planks
    • Utility transmission poles
    • Railway sleepers
    • Treated fencing and marine pilings

    3. Non-Ferrous Metal Surface Treatment

    Metarsenic acid functions as an activator and grain refiner during the chemical etching and surface cleaning stages of non-ferrous metal processing, such as in copper foil manufacturing, printed circuit board (PCB) production, and lead-based battery plate fabrication. This intermediate aids removal of scale and refines the microstructure of metal surfaces before subsequent coating or electroplating. Compliance with occupational exposure limits and effluent control is strictly enforced at each downstream site.

    Industry compliance standards

    • RoHS Directive 2011/65/EU — Restriction of Hazardous Substances in electronics
    • OSHA 29 CFR 1910.1025 — Occupational exposure to arsenic
    • ISO 4527:1998 — Electrodeposited coatings of gold for electronics
    • GB/T 25915.1-2010 — Cleanrooms and controlled environments

    Typical usage ratio

    • 0.01%–0.05% v/v in etching baths; concentration optimized per bath life cycle and substrate type

    Downstream process integration

    • Added to immersion tanks prior to acid pickling sequence
    • Continuous dosing in automated PCB surface cleaning lines

    Final product types

    • Copper foils for lithium-ion batteries
    • Printed circuit board base layers
    • Punched or rolled lead plates for automotive batteries
    • Connector pins and contact strips

    4. Synthesis of Organometallic Agricultural Chemicals

    In agrochemical synthesis plants, metarsenic acid acts as a precursor for specific organoarsenical compounds used in regulated applications, including the synthesis of pesticides or herbicides with controlled arsenic content. Formulators require high-purity input, and dosage scaling depends on target molecule yield and reaction stoichiometry. All downstream operations must maintain rigorous documentation due to end-use as agricultural actives under intensive scrutiny.

    Industry compliance standards

    • FAO/WHO Manual on Development and Use of FAO and WHO Specifications for Pesticides
    • REACH Regulation (EC) No 1907/2006 Annex XVII — Restrictions on manufacture and use
    • Chemical Facility Anti-Terrorism Standards (CFATS, US DHS)
    • ISO 9001:2015 for documented process controls

    Typical usage ratio

    • 1.8–2.4 molar equivalents per specific organoarsenic synthetic route; adjusted by conversion efficiency and target purity

    Downstream process integration

    • Metered introduction into reactor vessels during initial charge phase of organic synthesis
    • Batch-fed during controlled heating and subsequent neutralization reactions

    Final product types

    • Herbicidal actives for regulated regional markets
    • Non-crop biocidal agents (where legal and approved)
    • Specialty intermediates for further downstream formulation
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    Certification & Compliance
    More Introduction

    Metarsenic Acid: Product Commentary from the Chemical Manufacturer’s Perspective

    Grounded in Production: What Years of Manufacturing Metarsenic Acid Has Taught Us

    There’s a reason metarsenic acid keeps its place in the toolbox of seasoned chemical producers. Our line, model MA-01, has lived through hundreds of industrial campaigns, pilot trials, and routine process overhauls. Over these decades, we’ve watched the meticulous workflows and brutal practicalities required to transform raw arsenic trioxide into stable metarsenic acid. We drew out contamination risks, streamlined batch filtration, and tuned our drying systems again and again. It’s not glamorous; production crews don’t pull shifts because the work is easy. They stay for the sense of pride in pulling high-purity batches after hours of methodical, hands-on care.

    Every step from charging to final packaging gets tracked online and on the floor. We trust samples only when the QC techs have run them, cross-checked them, and sometimes, when the operation calls for it, autoclave the vessel and run it again before a ton leaves the line. With model MA-01, we’ve found that controlling for trace chloride and sulfide contaminants makes or breaks the utility in downstream synthesis. We run weekly audits on filtration mesh size, making sure our workers don’t have to cut corners to reduce downtime.

    Specifics: What Sets Our Metarsenic Acid Apart

    Our metarsenic acid batches emerge with a defined purity consistently above 98.5%. We analyze sulfate, chloride, cadmium, and lead contaminants down to a few ppm. Samples from every batch pass direct comparison tests against historic lots. From the start, we set out to support industries that demand materials they can trust—a promise that means more when we’re on the shop floor with the operators ourselves.

    Color varies little, usually presenting as a stark, off-white crystalline solid. Our MA-01 displays reliable dissolution in deionized water, forming clear solutions with predictable titration profiles. Years ago, labs tried to get by with sub-pure grades, masking color shifts, runny suspensions, and filter clogs down the drain. Strict rejection policies on any lot that veers from spec—not because a paperwork checklist says so, but because our own staff have worked the equipment and seen what a flawed charge can do during application—remain non-negotiable.

    Applications that Matter

    Metarsenic acid sits on industrial rosters for a reason. Customers in glass manufacturing, dye synthesis, and wood preservative blends have put our production team’s skills to the test. If a batch falls short on solubility or pushes heavy metal content above internally set limits, the resulting glass loses transparency, or wood protection falters in rainy field trials. Laboratory end users report clean color development when using our metarsenic acid in dye intermediates. In phosphate chemistry, our MA-01 supports researchers who value batch-to-batch reliability and documented trace impurity data. From the technicians’ side, a stable, dust-free, and fast-dissolving batch saves hours of prep work. Maintenance teams tell us it’s less equipment wear and less line stoppage compared to handling coarser, imported stocks that sometimes still brush the market.

    Years ago, a new customer attempted to cut costs by mixing a low-grade, high-sulfate alternative in their glass melting loop. Within weeks, bubbly, discolored panels forced lengthy troubleshooting. We offered our engineers’ insights, ran side-by-side trials, and demonstrated that the sulfates masked as cost savings led to tens of thousands in lost output. Since then, batch-to-batch consistency has become a key reason customers trust metarsenic acid from our plant.

    Quality by Practice: What Consistency We Aim For

    Temperature control tells the story. Small fluctuations in crystallization, even one or two degrees offset, lead to clumping or loss on filtration. Our operators manage batch cooling within a one-degree window, using both automatic and manual checks. It’s not enough to automate and walk away; experienced hands can spot unwelcome color shifts faster than in-line sensors. They cut off a crystallization run the minute these shifts emerge, then review and rework the charge rather than risk contaminating downstream supply. Nothing leaves the facility unless it meets agreed targets. Our staff takes the same rigor to periodic maintenance: thorough vessel cleaning, updating prefilter media, and refreshing worker training. All these simple practices keep contamination from sneaking back in, and they keep crew safety at the forefront.

    We took the E-E-A-T approach seriously long before it had a name. Our model focuses on staff knowledge, hard-learned lessons on process stubbornness, and respect for customers who don’t forgive mistakes. Each batch leaves a documented trail, signed off by experienced operators. Communication across shifts prevents quality drift—if one night team rejigs a procedure, the dayshift documents and reviews the change immediately. The pride in our batch record books, still maintained alongside digital logging, matches the pride we take in our final product quality.

    Handling and Storage Lessons

    Metarsenic acid likes stable, dry environments. Humidity transforms the surface over time, leading to minor caking and dissolution. Years back, uncontrolled warehouses led to sticky batches and container corrosion. In response, we overhauled our bagging and containerization. Resilient, moisture-proof liners and plastic drums replaced the earlier sacks that once admitted ambient moisture. Warehouse techs log daily temperature and humidity, inspecting for early signs of cross-contamination from neighboring products. Pallets now leave the line stretch-wrapped and clearly tagged by batch and production date, with records traceable through every shipment. Shipments involve staff oversight—not just paperwork, but regular, physical inspection of loads before they head to the yard.

    Our experience tells us that exposure risks climb when small residues build near fill stations. We constructed specialized venting and extraction systems for each stage: mixing, filtration, drying, and packing. These upgrades prevent operator exposure and keep neighboring products separated. Our operators don dedicated PPE and follow strictly outlined cleanup protocols. We backed this approach after an incident involving cross-product fumes, which, though small, led to a week of investigation and subsequent procedural overhaul. Today, batch room air quality is monitored, and samples are kept for every shift.

    How Metarsenic Acid Differs from Standard Arsenic Compounds

    We see many misconceptions around arsenic chemistry. Only those who work with it consistently come to appreciate the specific toggles that separate metarsenic acid from its cousins like arsenic acid or arsenic trioxide. With metarsenic acid, the difference goes beyond appearance or nominal purity. It reacts with alkali metals, glass fluxes, and various organic agents with sharper stoichiometry than arsenic acid, thanks to its singular hydrogen atom. Early on, chemists discovered that reactions with MA-01 had reduced by-product formation during dye synthesis compared to the trioxide route, which tends to introduce higher levels of unwanted arsenic(V) oxidation products.

    Our longtime glass partners report that using metarsenic acid as a refining agent reliably improves melt clarity. Holdups due to incomplete dissolution or residue buildup fall off markedly when moving from arsenic trioxide to MA-01. In pigment production, a switch from generic arsenic salts to our metarsenic acid has cut overall chemical usage without loss of color intensity, reducing environmental complaints and fines for heavy metal effluent. These real-world results make the difference clear: it’s not only about the certificate of analysis but about what happens on the line when ingredients perform exactly as the user expects.

    Industry Changes and Their Impact

    Demand for responsible sourcing and transparent production continues to force improvements. Years ago, regulators sharpened focus on arsenic compounds. In response, we trained all staff on safe handling, tracked exposures, and started working with environmental labs to regularly test effluent and airborne waste. We installed secondary containment, improved air scrubbing, and developed intervention plans for every process deviation. These aren’t feats for the sake of compliance—they protect workers who spend every shift close to potentially hazardous materials. The learning process never really ends. We run regular hazard assessments based on feedback from daily production. Any incident, near-miss, or product complaint triggers a root-cause review and results in new safeguards.

    Our view has always been pragmatic: new rules or changes in allowable arsenic discharge levels force manufacturers to innovate if they want a place at the table. Competitors selling products with ambiguous traceability or lower upfront costs struggle when regulators examine batch histories or demand custom certificates. Our track record comes from years of cooperation with buyers, who ask hard questions about residual metal content, operational waste, and long-term storage stability. Addressing these questions with real-world evidence—not just a line in an MSDS—cements our position as a trusted long-term partner.

    Addressing Common Hurdles and Finding Solutions

    Metarsenic acid brings its own set of production hurdles. The biggest comes from the raw starting materials: arsenic trioxide varies in impurity profile depending on its mine source. We secure supplies only from vetted, long-term partners who verify their mine output through third-party assay. Any change in source means validation runs before accepting new stock. Operators routinely run smaller “dummy” batches to catch any signs of trace lead or mercury, even at levels far below legal tolerances.

    Occasionally, transport interruptions or supplier downtimes pressure our planning. In these cases, we draw from buffer stocks and communicate anticipated delays to our downstream customers. Scarcity leads to price movement, which never helps our buyers plan costs. We keep channels open for substitution planning, including offering technical support for adjusting customer formulations if temporary changes to supply are needed. Our staff has spent more hours troubleshooting in customer labs than in sales meetings—demonstrating real solutions instead of theoretic handwaving.

    Handling waste and effluent remains another industry-wide concern. Our in-plant protocol keeps arsenic discharge well below the regulatory ceiling. After attending a regional conference on heavy metal runoff, our engineering team revamped pre-treatment protocols, adding staged filtration and pH adjustment in parallel streams. Periodic bioassay checks catch outliers and push our system to higher margins of safety. Customers repeatedly ask how we prevent environmental incidents—our best answer has always been open tours and third-party inspections, not sales talk. Regularly, our environmental specialists share these process upgrades during technical visits and webinars, helping both partners and competitors raise waste management standards.

    Training, Trust, and Knowledge Transfer

    One strength of our MA-01 production process comes from early investment in worker education. Entry-level operators learn from seasoned hands, working up from batch prep to final sampling over years, not days. This keeps institutional knowledge alive, passing down practical shortcuts, troubleshooting methods, and an ethos of never shipping product that might cause downstream issues. Each operator rotates through lab validation shifts, learning firsthand what end users look for in color, clarity, and reactivity. These cross-trained crews catch problems that no remote paperwork or automated system picks up.

    As regulatory knowledge spreads and chemistry curricula cover less hands-on, high-hazard production, companies risk losing the technical bedrock that supports reliable production. To counter this trend, we partnered with technical institutes to offer plant tours, real-world troubleshooting classes, and opportunities for young chemists to take responsibility for pilot-scale batches. New team members contribute to the ongoing tuning of our process, suggest improvements, and help us react faster to market shifts. This dialogue builds trust with downstream customers, who get to know not just the product but the people behind it.

    Supporting Customers Beyond Shipping

    Shipping a quality product is the minimum. The real work follows when customers reach out with new process challenges, contamination scares, or unexpected results. Our technical staff answers inquiries about precise reactivity, reports trace element results, and, where requested, participates in process troubleshooting. In a recent case, a pigment manufacturer encountered filter blockages due to an unexpected shift in their input water hardness. By testing side-by-side at our plant, we recommended a pre-dissolution filtration tweak, avoiding an expensive switch to an alternate chemical.

    We see these collaborations as part of our product offering—years of accumulated application knowledge offered as a service, not just as an afterthought. Our long-time partners know they can get support with both process upgrades and regulatory audits; we keep documentation of every batch and can quickly issue full impurity breakdowns, shipment data, and operational records on request. For customers in niche markets, our records sometimes help them defend their own production procedures during surprise third-party audits.

    Challenges never disappear in this business. Markets move, regulations tighten, and raw material supplies wax and wane. Metarsenic acid remains a valued solution because producing it right—every time—means understanding these external pressures and having a team prepared to adapt, explain, and stand behind every shipment.

    What the Future Holds for Metarsenic Acid Manufacturing

    The forward path for our metarsenic acid plant rests on three legs: maintaining hands-on expertise, pushing transparency, and embracing evolving environmental standards. Technology upgrades continue, but no new automation can replace the eye of a veteran operator. Sustainable supply means continual investment in safety upgrades, not just to meet regulations, but because the crew’s health comes first. We expect traceability standards to rise, with customers and regulators both demanding full-chain accountability. We don’t see this as a hurdle but a chance to show, day in and day out, that responsible chemical manufacturing is not just achievable but preferable for everyone involved.

    Metarsenic acid’s continued role in specialty chemical manufacturing will depend on the combined effort of workers, process chemists, and industry partners. It demands persistent attention to details and real-world results tracked over years, not quarters. By sticking close to our staff, our customers, and the realities of daily production, we keep finding ways to raise the bar, batch after batch, year after year.