| HS Code | 381792 |
| Chemical Name | Trimethyl Sulfoxide Bromide |
| Molecular Formula | C3H9BrOS |
| Molecular Weight | 173.07 g/mol |
| Cas Number | 25596-24-1 |
| Appearance | White to off-white crystalline solid |
| Melting Point | 122-126 °C |
| Solubility | Soluble in water and organic solvents |
| Storage Conditions | Store in a cool, dry place, away from light |
| Purity | Typically ≥98% |
| Synonyms | Bromotrimethylsulfonium bromide |
| Density | 1.56 g/cm³ (estimated) |
| Boiling Point | Decomposes before boiling |
| Iupac Name | Trimethylsulfonium bromide |
| Hazard Information | Irritant; handle with appropriate safety precautions |
As an accredited Trimethyl Sulfoxide Bromide factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Trimethyl Sulfoxide Bromide is supplied in a 25g amber glass bottle, featuring a tamper-evident cap and chemical hazard labeling. |
| Shipping | Trimethyl Sulfoxide Bromide should be shipped in tightly sealed containers, protected from moisture, heat, and direct sunlight. It must be labeled as a hazardous material and transported according to local and international regulations for toxic and corrosive substances, with appropriate documentation and safety measures in place to prevent leaks or exposure during transit. |
| Storage | **Trimethyl Sulfoxide Bromide** should be stored in a tightly sealed container, away from moisture and incompatible substances such as strong oxidizers and bases. Store it in a cool, dry, well-ventilated area, protected from direct sunlight and heat sources. Use secondary containment and keep away from acids. Ensure appropriate chemical labeling and access only to trained personnel. |
Competitive Trimethyl Sulfoxide Bromide prices that fit your budget—flexible terms and customized quotes for every order.
For samples, pricing, or more information, please contact us at +8615365186327 or mail to admin@ascent-chem.com.
We will respond to you as soon as possible.
Tel: +8615365186327
Email: admin@ascent-chem.com
Flexible payment, competitive price, premium service - Inquire now!
Years of hands-on work with halogenating agents have shown us that not all reagents meet the practical demands of modern organic synthesis. Trimethyl Sulfoxide Bromide stands out as a specialized tool, designed for straightforward bromination needs without the unpredictability that sometimes plagues unstable or impure options. Our manufacturing process ensures that each batch brings the reliability researchers expect—free-flowing, sharply characterized, directly traceable to defined parameters lot by lot.
This product, often recognized by chemists as TMSO-Br or TMSOB, fits into the laboratory or pilot plant where efficiency and consistent performance take precedence. For the sake of clarity, Trimethyl Sulfoxide Bromide is not simply a “bromine delivery agent”—it’s a purpose-built compound that simplifies specific transformations, offering a cleaner and less aggressive alternative to some traditional brominating routes. Production takes into account both purity and shelf stability, responding to years of lab-side feedback from chemists requesting less moisture sensitivity and manageable exotherms in use.
We make Trimethyl Sulfoxide Bromide with the understanding that even small shifts in physical characteristics can set back entire syntheses. Handling, storage, and dosing all impact yield, reproducibility, and final purity—our extensive internal controls catch off-spec features early in the process. As a reaction partner, TMSO-Br keeps to a narrow melting range and maintains color clarity over extended storage under recommended conditions.
Specifications matter when producing a bromide reagent for a demanding setting. Chemists in our facility monitor the product at every step for the signs that separate reliable lots from uncertain ones: sharp, well-defined melting curves, single-resonance NMR signals, residual solvent minima, and absence of overbromination side products. Moisture control at the last step also prevents unwanted hydrolysis, which not only affects yield but can also complicate downstream purification for our customers.
Anyone who has worked through the practical choreography of a halogenation step knows the frustration when the reagent doesn’t dissolve or reacts unpredictably. Many competing agents bring their own headaches—corrosive vapors, dirty workups, or unmanageable reactivity. Our own experience grew out of a decade spent troubleshooting with clients in both pharmaceutical and specialty chemical development. Feedback from real-world settings—failed conversions, needlessly prolonged purifications—singles out TMSO-Br as both user-friendly and efficient.
With many brominating agents, the presence of elemental bromine, NBS, or other N-halosuccinimides leads to colored impurities and environmental burdens for waste processing. Our process avoids persistent halogen off-gassing altogether, stripping away the need for complex personal protective equipment or over-ventilated hoods. Instead, we focus on batch-to-batch consistency and make sure the final product delivers the expected reactivity without extra hazards.
We take pride in manufacturing Trimethyl Sulfoxide Bromide under a model we label as “TMSOB-99,” referencing our in-house minimum standards of purity and consistency. After dry packing and proprietary stabilization, each run clears verification screening—ensuring a tightly held organosulfur signature, lack of mixed halides, and gross absence of starting materials. Users receive product that dissolves easily in common organic solvents and initiates bromination reactions cleanly in typical stoichiometric ranges.
These measures impact far more than numbers on a certificate; years in the industry show that synthetic breakdowns often trace back to subtle impurities or inhomogeneity in a commercial reagent. Our teams stand ready to discuss the actual production workflow and provide technical detail on each lot, backed by both classic wet chemical analysis and modern chromatographic fingerprinting.
Consistent production has taught us that chemists value a reagent which behaves predictably under standardized conditions. Trimethyl Sulfoxide Bromide starts and ends reactions without drawn-out induction periods or mysterious lags. This predictability saves time scaling from bench to plant, reducing not just waste but wear on the nerves of skilled operators. Our product packages feature tamper-evident seals and moisture-tight containers, based on repeated consultation with industrial partners working in variable humidity environments.
Once in the flask, TMSO-Br supports efficient bromine transfer, especially for methyl group functionalizations and activation of less reactive aromatic substrates. Since we produce at kilogram scale for both laboratory and pilot plant needs, feedback on physical handling factors into how we granulate and pack the final material. Frustration with clumped, sticky, or deliquescent powders taught us early on to refine our product so that precise aliquoting and dispensing remain steady from start to finish.
Clients have repeatedly found value using TMSO-Br in heteroaromatic bromination, benzylic bromination, and the activation of certain alkynes and alkenes. Small differences in handling and addition sequence can mean the difference between a rush back to the raw materials store and a smooth campaign through a dozen batches. Many rely on us to fill recurring needs, such as the synthesis of pharmaceutical intermediates, halogenated building blocks, and fine chemical products that will end up in research catalogs worldwide.
Since bromination reactions are frequently finicky, direct and reliable feedback from the shop floor enables us to iterate product specs. In the past, excessive polymerization or tar formation after bromine addition cost hundreds of hours and thousands of dollars downstream. Our reformulation several years ago tackled trace sulfur contamination, stabilizing the end product dramatically and keeping colored byproducts at bay.
Safe handling and waste disposal are daily concerns in our plant, not abstract compliance. Staff training centers on small details: double-checking storage in dry, dark, and sealed containers, running regular checks for pressure buildup in unopened drums, and conducting ventilation surveys at dispensing points. We value not just internal safety, but extending clear, practical guidance to our customers. Most labs using TMSO-Br know from experience that keeping the material cool and dry not only prevents degradation, but stabilizes performance batch after batch.
Our teams engage with downstream users about the safest and simplest workup protocols. Since TMSO-Br by design contains no explosive or excessively volatile impurities, standard waste neutralizations apply, using sodium thiosulfate or similar common quenching agents. Years of direct feedback led us to prioritize the stability and compatibility others overlook, supporting safe scale-up from gram to kilogram quantities without dramatic shifts in decomposition profile.
We do not see TMSO-Br as a commodity. Subtle differences in purity, granularity, and even packaging dramatically shift downstream process outcomes. Our clients tackle complex multi-step syntheses, where a single off-spec halogenating agent can disrupt entire process validation campaigns or force the loss of valuable starting material. Open reporting and customer dialogue underlie our approach. We provide in-depth technical files with every shipment, traced to in-process analytical checkpoints and full retention samples.
Old lessons teach that making something “good enough” never satisfies customers scaling to regulatory environments or facing new route development. We refine process controls based on these real-world narratives, so synthetic chemists can focus on their chemistry rather than working around reagent faults. This culture of data-driven manufacturing means that client feedback shapes every improvement, from updated drying protocols to new drum linings that reduce transfer loss.
Our commitment to cleaner chemistry stems from years tracking waste load, emissions logs, and customer reports on environmental audits. We developed TMSO-Br as a replacement for older bromination agents that posed persistent environmental and operator exposure problems. Routine workups with TMSO-Br reduce formation of heavy halide sludges and chlorinated byproducts. Waste streams with our product have repeatedly passed third-party inspections with lower halide content and easier neutralization.
We maintain full traceability on both raw material and outgoing packages. Batch labels document not just manufacturing date, but full analytical profiles—organic, inorganic, and packaging residue characteristics. Environmental responsibility informs our own procurement of bromine and DMSO, as we avoid suppliers running outdated, inefficient processes. Customer audits confirm these upstream efforts, closing the loop on responsible manufacturing.
Many clients arrive with experience handling commercial reagents that let them down in the middle of a campaign. We have spent decades troubleshooting side-by-side with process chemists, from first trial brominations to scale-up mishaps. Our technical support draws on this first-hand problem-solving, rather than generic template answers. Detailed production records are available for every order, with technical managers on call to troubleshoot, recommend quench techniques, and share case histories drawn from both successes and early failures.
We openly discuss shipping conditions, supply chain logistics, and best handling practices for specific applications. Whether it’s choosing the right solvent, tuning reaction temperature, or troubleshooting odd workup behavior, chemists at our facility provide support that comes from their own time running reactions—not just reading procedures.
Customer feedback often references jealousy over the limited unpredictability seen with TMSO-Br compared to many classic bromination agents. Traditional methods using liquid bromine or elemental bromine struggle with volatility, odor control, and excess oxidative byproducts. NBS and related compounds sometimes bring batch-to-batch variability linked to aging and residual impurities. In contrast, our control over moisture and structural integrity eliminates much of the frustration others report with off-the-shelf halogenating reagents.
Chemists emphasize simpler workups with TMSO-Br—cleaner product layers, fewer byproducts, and a much-reduced burden on ambient air monitoring. Precise dosing supports fine-tuned molar ratios, helping multi-step synthesis where bromination must proceed without overreaction. Ongoing lab comparisons show higher isolated yield across dozens of substrate classes, with reduced run-to-run performance drift. While elemental bromine remains entrenched for some legacy processes, the move to TMSO-Br reflects a push for better safety, environmental, and cost outcomes in the field.
From the perspective of our production team, the best marker of success remains returning customers. Their feedback after using TMSO-Br in benzylic brominations, aromatic substitutions, and challenging late-stage derivatizations shapes both our manufacturing tweaks and ongoing product development. Routine client checks report not only cleaner chromatography, but lower demand for silica, less aggressive washing steps, and more consistent product mass balances.
Our outreach consistently brings new insights—reporting both limitations and advantages in specific chemistries. Armed with this, we continually tweak drying steps and lot release standards. These changes bring a measurable drop in end-of-campaign rejections, helping synthetic chemists reduce both direct costs and opportunity losses linked to hard-to-control reactions.
Facing the daily realities of industrial-scale chemistry, we resist the trap of one-size-fits-all reagents. Our own teams know the frustrations of crystallization fouling, reagent clumping, and unpredictable reactivity. Direct feedback from chemical engineers and team leads drives us to run small-scale tests before releasing new lots, validating not just organic purity but ease of weighing and handling in high-throughput settings.
Many of our innovations grew from in-house troubleshooting. Years ago, customer complaints about transfer dust and material bridging in process hoppers sent us back to the drawing board. Working closely with synthetic leads, we introduced improved granulation for smoother transfer and longer free-flow shelf life. These small refinements emerge from a company culture grounded in real experience, not just compliance-driven paperwork.
After years of producing Trimethyl Sulfoxide Bromide for demanding users, the importance of direct lines between manufacturer and end user becomes clear. Third parties and resellers rarely have the technical depth or stability history needed to resolve nuanced production issues. Chemists value the depth of experience that comes from making, using, and troubleshooting the same materials they rely on. We share detailed production logs, open up analytical data, and often go as far as running collaborative pilot reactions to verify reagent compatibility.
Trust builds over time, shaped by repeated delivery of product that passes not just analytical checks but stands up to real-world chemistry challenges. Our willingness to adapt, refine, and troubleshoot draws heavily from hands-on practice, not abstract industry “best practice.” Clients know they are discussing direct experiences, not generic manufacturer claims, and that level of transparency matters most when a critical campaign depends on it.
The journey of refining Trimethyl Sulfoxide Bromide encapsulates our broader approach to chemical manufacturing. Rather than making claims from a distance, we invest in seeing the same product through its entire lifecycle—from raw material selection through shipping and direct support. Each challenge met along the way reshapes quality controls, analytical methods, and packaging. This ongoing cycle assures chemists that they’re working with a reagent refined through hard-won learning over years of continuous production and client engagement.
As the requirements for clean, safe, and high-performing bromination steps continue to evolve, we remain committed to furthering quality and transparency. Our catalog reflects not just what works in the lab, but what holds up under pressure in the plant and in the hands of real chemists dedicated to pushing synthesis further. In this space, Trimethyl Sulfoxide Bromide is more than a reagent—it’s a proven solution built from direct industry feedback and tested insight gained from production floor to finished compound.
