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4-Bromo-Benzenesulfonic Acid Potassium Salt

    • Product Name 4-Bromo-Benzenesulfonic Acid Potassium Salt
    • Alias Potassium 4-bromobenzenesulfonate
    • Einecs 242-974-6
    • 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
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    Specifications

    HS Code

    663711

    Chemical Name 4-Bromo-Benzenesulfonic Acid Potassium Salt
    Molecular Formula C6H4BrKO3S
    Molecular Weight 291.16 g/mol
    Appearance White to off-white powder
    Cas Number 25098-01-9
    Melting Point 283-287 °C (decomposes)
    Solubility In Water Soluble
    Storage Temperature Room temperature
    Purity Typically >97%
    Synonyms Potassium 4-bromobenzenesulfonate

    As an accredited 4-Bromo-Benzenesulfonic Acid Potassium Salt factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.

    Packing & Storage
    Packing White plastic bottle with a tight-sealing screw cap, labeled "4-Bromo-Benzenesulfonic Acid Potassium Salt, 100g," displaying hazard and safety information.
    Shipping 4-Bromo-Benzenesulfonic Acid Potassium Salt is shipped in sealed, chemical-resistant containers to prevent moisture and contamination. Transport complies with relevant regulations for non-hazardous solid chemicals. Packages are labeled clearly and accompanied by a safety data sheet. Storage during transit should be cool and dry, avoiding exposure to extreme temperatures or incompatible substances.
    Storage 4-Bromo-Benzenesulfonic Acid Potassium Salt should be stored in a tightly sealed container, away from moisture and incompatible substances such as strong oxidizers. Keep it in a cool, dry, and well-ventilated area, protected from light and heat sources. Proper labeling and secondary containment are recommended to prevent contamination and accidental mixing with other chemicals.
    Application of 4-Bromo-Benzenesulfonic Acid Potassium Salt

    Applications of 4-Bromo-Benzenesulfonic Acid Potassium Salt in Industrial Manufacturing

    As a direct manufacturer of 4-Bromo-Benzenesulfonic Acid Potassium Salt, we supply industrial producers with consistent, high-purity material for critical downstream applications. Our material supports advanced synthesis requirements across specialized sectors, with full traceability through audited quality systems and defined industrial standards. Below, we detail the core applications in which this material has proven performance, including industry-specific formulation, compliance, and downstream process integration information for each.

    1. Dye Intermediate Production for Reactive Dyes

    Our material is widely used as a sulfonation intermediate in reactive dye synthesis, where the bromine functionality facilitates targeted aromatic substitutions and coupling reactions. Producers of textile dyes apply this intermediate during azo coupling steps, enabling manufacture of water-soluble colorants with controlled sulfonate content. Consistent batch characteristics are essential to ensure reproducibility of both color shade and dyeing performance on cellulose fabrics. Automated dosing and in-process controls help meet regulatory absences of restricted aromatic amines in finished dyes.

    Industry compliance standards

    • REACH Regulation (EC) No 1907/2006 for chemical substances
    • OEKO-TEX Standard 100 (relevant dye impurities and migration limits)
    • ZDHC MRSL (Zero Discharge of Hazardous Chemicals)
    • ISO 9001:2015 certified QC processes

    Typical usage ratio

    • Ranges from 2%–8% by weight in dye intermediate reaction mass, depending on the targeted molecular structure, shade depth, and substitution pattern

    Downstream process integration

    • Added at the controlled sulfonation or diazo coupling stage; the potassium salt form allows direct water dissolution for batch reactor feed, followed by purification, condensation, and spray drying of the resulting dye intermediate

    Final product types

    • Powder and granular reactive dyes for cotton and blended textiles
    • High-performance printing dyes
    • Liquid dye preparations for continuous dyeing processes

    2. Pharmaceutical Intermediate Synthesis—Sulfonic Acid-Substituted Building Blocks

    Pharmaceutical manufacturers incorporate our product as a brominated sulfonic acid source in the multi-step synthesis of complex drug intermediates, particularly where strict control of aromatic substitution is required. The high aqueous solubility and defined reactivity of the potassium salt enable selective formation of sulfonated and brominated scaffolds under cGMP environments. Downstream controls focus on residual inorganic and organic impurities to meet pharmacopeial limits for further API processing.

    Industry compliance standards

    • ICH Q7—Good Manufacturing Practice for Active Pharmaceutical Ingredients
    • USP-NF / EP / JP (purity, residual solvents, and heavy metals)
    • 21 CFR Part 211 (US FDA GMP regulations)
    • European Pharmacopoeia monographs for excipient residues

    Typical usage ratio

    • Typically introduced in stoichiometric excess of 1.1–1.3 equivalents relative to the target aromatic substrate to drive complete substitution while minimizing unreacted starting material

    Downstream process integration

    • Employed during the aromatic electrophilic substitution step within a protected environment; followed by workup, phase separation, organic extraction, and chromatographic purification before use in further medicinal chemistry steps

    Final product types

    • Sulfonic-acid modified aromatic building blocks
    • Advanced pharmaceutical intermediates for APIs
    • Custom synthesis compounds for CRO/CMO supply

    3. Manufacture of Electroplating Additives—Brightener and Grain Refiner Precursors

    Electrochemical industries use this material in the preparation of brightener and grain refiner formulations for metal finishing baths, especially nickel and copper. The compound supports the introduction of sulfonate groups into aromatic additive scaffolds, influencing deposit structure and surface gloss. Controlled dosing, trace metal monitoring, and solution stability are necessary to prevent interference with electroplating efficiency and minimize introduction of banned elements in final deposits.

    Industry compliance standards

    • RoHS Directive 2011/65/EU (free from restricted heavy metals)
    • ISO 14949:2001 (Additives for electroplating baths)
    • ISO 14001 Environmental Management in chemical mixing rooms
    • Special Process Control protocols validated by automotive and electronics OEMs

    Typical usage ratio

    • Usually formulated at 0.05%–0.3% relative to total brightener blend, with exact proportion based on metal ion concentration, current density, and bath maintenance cycles

    Downstream process integration

    • Added during formulation of organic additive concentrates; the potassium form allows dissolution in pre-mix tanks before combination with proprietary brightener blend and delivery to electroplating bath make-up tanks

    Final product types

    • Electroplating brightener additives
    • Grain refiner concentrates for nickel and copper baths
    • Component additive kits for printed circuit board finishing

    4. Synthesis of Specialty Surfactants—Aromatic Sulfonate Surfactant Intermediates

    Producers of industrial surfactants use brominated aromatic sulfonates as intermediates for specialty anionic surfactant synthesis, often in emulsion polymerization or oilfield formulations. The bromine substituent imparts targeted reactivity for further organic modification, enhancing surfactant solubilizing power and interfacial performance in demanding conditions. In-house QC controls focus on bromide and sulfate residues to align with performance and environmental targets.

    Industry compliance standards

    • OECD Guidelines for Testing of Chemicals (biodegradability and aquatic toxicity)
    • ECHA REACH Annex XVII (restriction of certain surfactant impurities)
    • EN ISO 9001 for formulation process control
    • Product-specific ecological hazard class (WGK/CLP labeling rules)

    Typical usage ratio

    • Introduced in 1%–6% w/w of total surfactant precursor charge, with ratio optimized for desired emulsification or foaming properties in the target application

    Downstream process integration

    • Dosed at the aromatic sulfonation stage followed by neutralization and, if necessary, further functional group modification to yield the target surfactant active

    Final product types

    • Anionic surfactant intermediates for emulsion polymerization
    • Specialty dispersing agents for oil and gas processing
    • Stabilizers in latex and adhesive systems

    5. Advanced Polymers—Functional Monomer for Conducting Polymer Synthesis

    Producers of advanced functional polymers incorporate this compound as a monomer precursor in the synthesis of electrically conducting polymers and copolymers. The aromatic sulfonic acid group provides ionic conductivity, while the bromine position allows for further cross-linking or grafting, essential for fine-tuning polymer film properties. Stringent control of polymerization kinetics and raw material purity is required to achieve batch-to-batch uniformity and prevent introduction of conductive defects.

    Industry compliance standards

    • IEC 61340-4-5 (antistatic and conductive polymer requirements)
    • RoHS 2011/65/EU for avoidance of restricted halogenated substances in electronics
    • ISO 9001 process and QC documentation for polymer production
    • Customer-specific electrical property specification agreements

    Typical usage ratio

    • Typically 1%–4% w/w of functional monomer loading, adjustable based on required polymer conductivity, mechanical strength, and processing viscosity

    Downstream process integration

    • Fed into aqueous or organic polymerization reactors at controlled temperature; the potassium salt’s solubility supports uniform monomer mixing prior to initiator addition

    Final product types

    • Polyaniline-based antistatic coatings
    • Conductive copolymers for flexible electronics
    • Membrane materials for electrochemical devices

    6. Photographic Chemical Manufacturing—Sulfonated Sensitizer and Coupler Synthesis

    Producers of specialty chemical components for analog photographic and radiographic films employ this compound to introduce brominated sulfonic groups into dye couplers and spectral sensitizers. The careful management of halogen substitution via controlled addition maintains the sharp spectral response and dye stability demanded by high-performance imaging applications. Residual halide and sulfonate contaminants are tightly specified in finished compounds destined for the photographic sector.

    Industry compliance standards

    • ISO 3664:2009 for viewing conditions and color fidelity in photography
    • ISO 18902:2007 for processed imaging materials
    • FDA 21 CFR 189 (where applicable to x-ray film processing)
    • Internal colorimetric and purity QC standards

    Typical usage ratio

    • Used at 0.5%–3% relative to total coupler or sensitizer charge, tuned according to desired absorption maxima and film speed

    Downstream process integration

    • Added to the synthesis step for coupler or sensitizer, typically in aqueous solution, followed by neutralization and purification of the sulfonated product before blending into film emulsions

    Final product types

    • Color couplers for photographic film
    • Spectral sensitizer components
    • Radiographic imaging additives
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    Certification & Compliance
    More Introduction

    4-Bromo-Benzenesulfonic Acid Potassium Salt: Practical Chemistry from a Manufacturer’s View

    Understanding 4-Bromo-Benzenesulfonic Acid Potassium Salt in the Chemical World

    In the chemical industry, certain compounds hold importance because of their consistent performance and predictable results in the lab and on the production line. Among these, 4-Bromo-Benzenesulfonic Acid Potassium Salt continues to play a significant role for formulators and researchers working with sulfonated aromatic compounds. From day-to-day operations at our manufacturing plant to the technical discussions with long-term buyers, we’ve seen this compound prove its worth in many synthesis projects.

    The material, which appears as a white to off-white powder, shows impressive solubility in water and demonstrates good chemical stability under a typical range of laboratory conditions. Potassium salts like this one often edge ahead of sodium or ammonium variants because potassium has a sharper solubility profile. This property affects how reactions proceed and how easily the salt can be rinsed away or crystallized for purification. Our own production lines use controlled temperatures and strictly monitored bromination to ensure every batch matches a stable set of specifications for 4-bromo content, sulfonation efficiency, and potassium counterion purity.

    Why Manufacturers Prefer Potassium Salts in Applications

    There’s nothing quite like real-world application to separate useful chemistry from everything else. For years, we’ve supplied both sodium and potassium salts of substituted benzenesulfonic acids, and the choice often comes down to nuances that only show up after upscaling reactions or running them in continuous batches. Potassium variants often dissolve more rapidly and reach equilibrium more predictably compared to sodium analogues.

    Sulfonic acid groups add hydrophilicity to the aromatic ring, and by swapping in a potassium cation, the resulting salt resists caking and clumping during storage in humid conditions. Large-scale users who order in drum quantities notice the difference immediately. This property alone makes handling and weighing the solid more consistent and less prone to error or loss, especially important when operating under ISO or GMP requirements in pigment and pharmaceutical synthesis.

    From our own inspection logs, potassium salts also show lower tendency toward hygroscopic behavior than their sodium cousins. This advantage translates into longer shelf life and greater assurance of batch-to-batch results — a practical outcome that directly affects both inventory management and product quality.

    Rolling Out Consistent Specifications

    For the user, consistency isn’t just a buzzword: it’s about chemical lots that behave the same every time. Our typical specification for 4-Bromo-Benzenesulfonic Acid Potassium Salt includes a high level of purity and low inorganic residue, and we prioritize the same equipment and analytical methods with every run. Years spent troubleshooting alongside our customers have shown that minor contaminants can cause unexpected color shifts in dye synthesis or introduce byproducts downstream. That’s why each batch passes through strict HPLC and ion chromatography to check for trace metals and monitor sulfonic acid group integrity.

    We don’t just rely on the certificates that come out of the QA lab. Many of us who work in production have spent hours checking off lists, sampling incoming raw material drums, and talking to suppliers directly when anything seems off. This hands-on approach keeps the lines running smoothly — and keeps our customers happy, whether they operate in textile dyeing, pharmaceutical research, or specialty material manufacturing.

    Different Products, Different Results: Comparing with Similar Aromatic Sulfonates

    Chemists have more than one choice when it comes to brominated benzenesulfonic compounds. We’ve worked with various salts: sodium, lithium, even organic amines, depending on specific application demands. Pure 4-Bromobenzenesulfonic Acid sometimes shows up in catalogs, but it tends to be more reactive, harder to handle, and less stable for long-term use. The potassium salt remains free-flowing even after months in sealed bags, making it more practical on the factory floor and in bench-scale synthesis.

    Other sulfonic acid salts like para-toluenesulfonate or the unsubstituted benzenesulfonic acid potassium salt hold value in different scenarios. In dye intermediates work, the specific halogen — bromine in this case — injects a strong activating effect on the aromatic ring. This change enables selective coupling or bridging in multi-step syntheses. Some customers switch to the potassium salt version precisely because of fewer issues with byproduct precipitation or downstream processing when filtering out the end products.

    We’re frequently asked about switching between potassium and sodium salts. The switch often boils down to solubility and isolation after reaction. Imagine filtering a slurry after adding a brominated sulfonate: potassium versions settle well and can be washed down without leaving stubborn residues behind, ticking the boxes for clean separations and easier analytic checks.

    Key Applications from a Manufacturing Perspective

    Demand for 4-Bromo-Benzenesulfonic Acid Potassium Salt comes mostly from sectors that deal with dye intermediates, special polymers, and, in rarer cases, pharmaceutical intermediates. In azo dye synthesis, many classic recipes rely on this compound to introduce a stable sulfonate group together with a bromine, which creates both a reactive handle and water solubility for the intermediate. The potassium salt formulation allows the process chemist to control pH during diazotization or coupling — something much harder to manage using the acid or sodium salt alone.

    Technical uses like sulfonation agents in polymer work or additives in specialty coatings also benefit from the potassium variant. On our shop floor, we’ve scaled up custom syntheses for research groups who need a clean, single-step path to bromo-substituted building blocks. For these chemists, the need for a reliable, reproducible product outweighs marginal price differences between sodium and potassium salts. Years of experience taught us that chasing the lowest-cost version often leads to more headaches than savings.

    How Real-World Factors Drive Product Design

    Products like 4-Bromo-Benzenesulfonic Acid Potassium Salt respond to a grounded need: efficiency in handling, reliability in synthesis, and safety in long-term storage. We’ve handled plenty of special requests from customers with niche requirements — from drum-to-tote repackaging to double-lining bags for humidity protection in monsoon-affected regions. Requests like these shaped how we improve not just the product, but the packaging, labeling, and logistics that surround it.

    Shifts in global trade have also affected demand for brominated intermediates. With tighter regulations on toxic metals and persistent organic pollutants, fine-chemical companies pay more attention to the minor details. Potassium’s larger ionic radius, combined with extremely low reactivity, helps reduce risk of unwanted reactions with other salts in mixed reactors. Our technical staff works closely with end users to optimize cleaning protocols and disposal, especially where waste regulations are strict.

    Small changes, such as moving from one counterion to another, can impact downstream environmental audits and worker safety. Many end-users appreciate data from our real-world observations: potassium salts require less respiratory protection during handling and produce less fine dust in our blending rooms, compared to sodium or acid variants. Simple facts like these can become major points during safety meetings or when drafting site-specific standard operating procedures.

    Bringing Experience Into the Chemist’s Workflow

    We’ve seen a lot over the years — from trial-scale glassware cluttered with sticky residues to unmixed drums discovered at the back of a warehouse. Lessons from each scenario add up and change how we approach both manufacturing and technical support. Chemists new to using 4-Bromo-Benzenesulfonic Acid Potassium Salt appreciate application notes or firsthand tips, not just spec sheets or regulatory numbers. For example, potassium salts store better in low-humidity conditions, and any caked material can be broken down with a rubber mallet or transferred to a fluidized bed for larger operations.

    Smaller-scale users sometimes overlook how sensitive many organosulfonates are to minor impurities, say, a half-point extra on residual moisture. Our QC staff use Karl-Fischer titration instead of relying on loss-on-drying tests, as this yields more reliable figures for water content. This embeds consistency into every batch, whether it ships in laboratory glass or in 500-kg drums.

    Operators running synthesis lines like to know what happens over long periods, not just in the first week. Potassium salts notoriously resist yellowing or color shifts, even after weeks exposed to warehouse conditions. For pigment applications, this characteristic means less variation in finished color tone, fewer reruns, and less scrap. Such details rarely get much play in catalogs, yet for our customers, they can be the difference between hitting technical targets or having to tweak recipes week after week.

    Continuous Improvement: Using Feedback Loops in Manufacturing

    As manufacturers, the most valuable resource we have is not just analytical reports but feedback from people who use our product on the ground. Over the past decade, we’ve worked with dye houses operating batchwise and in continuous lines, specialty chemical producers focused on tight impurity control, and R&D labs scaling up from grams to tons per year. The result is a product that reflects hundreds of small improvements — moving to anti-static liners for powder, adjusting particle size distribution, even adjusting mixing times based on actual downstream processing needs.

    Each improvement comes directly from the field — like requests for finer or coarser grades, or insights gained when switching from glass-lined reactors to stainless equipment. Our technical team shares best practices, such as dissolving the salt in deionized water first to avoid microprecipitation, or specifying bespoke packaging for temperature- or moisture-sensitive shipments headed overseas.

    We’ve seen firsthand how even a slight uptick in insoluble matter can force a rework, or how an easily overlooked particle size mismatch can clog lines during filtration. Lessons like these shape our own internal communication between production, quality, and logistics, ensuring the end user receives a well-prepared, reliable product every time.

    Supporting Modern Chemistry with Practical Materials

    It’s easy to underestimate the ripple effect a single intermediate can have on broader chemical manufacturing. Certain dye and pigment makers rely on a clean input stream of 4-Bromo-Benzenesulfonic Acid Potassium Salt to feed multi-step syntheses. For these operations, any off-spec batch delays production, raises costs, or even knocks out entire lines of downstream products.

    Consistency is more than just keeping the color the same — it’s about translating lab-scale techniques into the reality of industrial machines and unpredictable storage facilities. In our own facility, batch traceability and accountability go hand-in-hand with data from packing and dispatch, making real-world experience as important as any laboratory test.

    Supporting quality R&D means being available for technical consultation long after the initial shipment leaves the plant. Customers in advanced applications sometimes require modifications, such as ultra-low metal content for high-purity synthesis, or custom blending with a cosolvent. Our willingness to take on bespoke requests reflects both our expertise and our decades-long investment in staff development.

    The Real Cost of Quality in Chemical Manufacturing

    Years spent honing our manufacturing process for 4-Bromo-Benzenesulfonic Acid Potassium Salt have shown that cutting corners on raw material quality or process control never pays off. Suppliers occasionally approach us with cheaper alternatives for brominated intermediates, tempting us to trial unknown sources or accept less documentation for the sake of price. Almost always, minor savings in procurement turn into visible disruptions in production — not just for us, but for every customer down the chain.

    Predictable output, safe handling, and minimal environmental impact come from setting strict parameters and holding every batch to those marks. We regularly update our analytical methods based on advances in detection, whether spotting trace halides or ensuring potassium content matches declared values. Engineering improvements sometimes follow deep dives into actual production mishaps — learning to adjust pH tolerance for specific reactors, or redesigning storage rooms to fight humidity intrusion.

    For those working in high-purity fields, tracking impurity drift and understanding long-term product decomposition are just as important as price per kilogram. We provide test data from lots held in simulated warehouse conditions for extended periods to ensure that what goes out the door holds up through storage, transport, and end-use, even when conditions fall outside the ideal.

    Practical Recommendations for New and Experienced Users

    Our experience with 4-Bromo-Benzenesulfonic Acid Potassium Salt includes more than just filling orders. We’ve walked clients through switching from sodium to potassium salt, finding them faster dissolution rates and better results in critical coupling reactions. For new users, we recommend running bench tests using actual plant water and standardizing drying times, as small variations can impact both reaction times and isolated yields at scale.

    Operators facing frequent humid conditions have benefited from using double-layer packing and desiccants, practices we developed specifically to keep batch consistency intact. Those less familiar with handling sulfonic acid salts sometimes overlook the importance of sealed storage and batch tracking across long supply chains. We see repeat customers stick with our product less because of price, and more because of the repeatable outcomes they gain in their own production.

    For troubleshooting or scaling up to new production lines, clean solvent selection and agitation timing matter. Small improvements, like keeping solution pH in a certain range or pre-warming tanks, cut down on runtime variabilities. From our side, we keep documentation on archive, and provide guidance based on the dozens of similar projects we’ve supported over the years, ensuring that our partners get past common hurdles quickly.

    Looking Ahead: Evolving Role of Potassium Salts

    Chemistry keeps evolving, and so must chemical manufacturing. Regulatory shifts and end-use applications are becoming more specialized, and high information transparency is increasingly important to our clients. Our approach means integrating real user feedback from research chemists and plant operators, and remaining vigilant for small process tweaks that yield better products.

    As compound performance grows in importance for electronics, specialty polymers, pigment precursor synthesis, and analytical applications, we aim to ensure that future lots of 4-Bromo-Benzenesulfonic Acid Potassium Salt remain fit for new technologies. Our customers value responsiveness and on-the-ground knowledge as much as any technical bullet point.

    We will keep pushing to improve every aspect, from the source chemicals and process safeguards, to logistics and technical guidance. The end result is a chemical product that delivers reliable results, makes life easier for users in production and lab settings, and adapts as the chemical landscape continues to change. That’s how real-world manufacturing meets modern industry demands, and why we stand behind the materials we make today and in the future.