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Trimethylsilylacetylene

    • Product Name Trimethylsilylacetylene
    • Alias TMS-acetylene
    • Einecs 211-041-8
    • 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
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    Specifications

    HS Code

    778443

    Chemical Name Trimethylsilylacetylene
    Molecular Formula C5H10Si
    Molar Mass 98.22 g/mol
    Cas Number 1066-54-2
    Appearance Colorless liquid
    Boiling Point 52-54 °C
    Density 0.690 g/mL at 25 °C
    Refractive Index 1.390 (20 °C)
    Flash Point -16 °C (closed cup)
    Solubility In Water Insoluble
    Vapor Pressure 150 mmHg at 20 °C
    Smiles C#C[Si](C)(C)C
    Pubchem Cid 7300

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

    Packing & Storage
    Packing Trimethylsilylacetylene is supplied in a 100 mL amber glass bottle with a tight PTFE-lined cap, sealed for air-sensitive chemicals.
    Shipping Trimethylsilylacetylene is typically shipped in tightly sealed containers under inert gas to prevent moisture and air exposure, as it is flammable and sensitive to oxidation. Packages comply with ADR, IATA, or IMDG regulations, labeled as a flammable liquid (UN 1993 or UN 3295). Proper ventilation and temperature controls are maintained during transport.
    Storage Trimethylsilylacetylene should be stored in a tightly closed container under an inert atmosphere, such as nitrogen or argon, to prevent moisture and air exposure. Keep it in a cool, dry, and well-ventilated area away from sources of ignition, heat, or incompatible materials like oxidizing agents. Protect against static discharge, and store separately from acids and strong bases to avoid hazardous reactions.
    Application of Trimethylsilylacetylene

    Applications of Trimethylsilylacetylene in Industrial Manufacturing

    As a direct manufacturer of Trimethylsilylacetylene (TMSA), we supply this key intermediate for a range of advanced industrial synthesis processes. Below, we detail refined downstream application scenarios, each backed by active use in targeted industries, with technical information for formulating, scaling, and compliance planning.

    1. Pharmaceutical Active Ingredient Synthesis

    Pharmaceutical companies incorporate Trimethylsilylacetylene in the preparation of acetylene-functionalized heterocycles and complex aryl/alkynyl intermediates, crucial for drugs treating central nervous system and oncology indications. TMSA enables selective carbon–carbon coupling via Sonogashira and other catalytic reactions, facilitating late-stage diversification while limiting side reactions. Contract manufacturers typically adjust charge ratios for each medicinal route to balance yield and downstream deprotection efficiency, always controlling trace impurity formation to meet regulatory filing requirements.

    Industry compliance standards

    • ICH Q7 GMP for Active Pharmaceutical Ingredients
    • US FDA 21 CFR Part 210/211 (Current Good Manufacturing Practice for Finished Pharmaceuticals)
    • European Pharmacopoeia (Ph. Eur.) for process impurities
    • USP <741> Melting Range (if isolated intermediates are involved)

    Typical usage ratio

    • Stoichiometric to 1.2 equivalents relative to aryl halide, commonly 1.05–1.10 eq for scalability; adjustment based on catalyst loading and impurity controls.

    Downstream process integration

    • Used in palladium-catalyzed cross-coupling reactor after raw material charging and catalyst activation; followed by alkaline deprotection or acidolytic removal of trimethylsilyl group to yield terminal acetylene intermediate.

    Final product types

    • Oncology and CNS small-molecule APIs (e.g., kinase inhibitors, neuroactive compounds)
    • Key intermediates for specialty pharmaceuticals
    • High-purity prodrug building blocks
    • Substituted aromatic compounds for drug discovery

    2. Electronic Materials: OLED and Organic Semiconductor Synthesis

    Manufacturers of organic electronics depend on TMSA for fabricating acetylene-bridged oligomers, conjugated polymer precursors, and organic field-effect transistor (OFET) components. By introducing trimethylsilyl-protected alkyne units, formulators control molecular planarity and solubility, critical for post-synthetic processing and device integration. Quality teams maintain documentation to verify residual metal and siloxane levels below established material qualification thresholds, as device reliability hinges on upstream intermediate purity.

    Industry compliance standards

    • JEITA EM-3508 material assessment guidelines
    • IPC-4101B for laminates (for downstream substrates)
    • ISO 9001:2015-certified quality management
    • RoHS 2011/65/EU for lead and heavy metal content (where applicable to finished assemblies)

    Typical usage ratio

    • 1.0 to 1.5 equivalents per aryl halide; process adjustment for molecular weight target and solubility requirements.

    Downstream process integration

    • Feed into multi-step organometallic coupling reactors, forming acetylene-linked oligomers, with subsequent deprotection and purification prior to spin-coating or solution casting for device layer assembly.

    Final product types

    • OLED emitter and charge transport materials
    • OFET active layers
    • Organic photovoltaic cell precursor films
    • Custom-conjugated polymers for thin-film electronics

    3. Specialty Agrochemical Intermediate Manufacturing

    Agrochemical companies utilize TMSA to construct terminal acetylene functionalities in synthetic pathways for select herbicides and fungicides. Its use allows precise functionalization without hazardous free acetylene gas handling, contributing to safer process plant operation. Formulation chemists monitor molar charge and impurity carryover, coordinating with downstream teams to ensure final actives stay within international agrochemical residue maximums. The TMS group’s stability provides a window for multistep reactions prior to deprotection and formulation blending.

    Industry compliance standards

    • FAO/WHO JMPR specifications
    • ISO 9001:2015/ISO 14001 for environmental management
    • Regulation (EC) No 1107/2009 for plant protection products (EU)
    • US EPA 40 CFR Part 180

    Typical usage ratio

    • 1.05–1.20 mol per halogenated aromatic ring, matched to target batch impurity limit and downstream scalability.

    Downstream process integration

    • Added during aromatic substitution steps, followed by purification and protected intermediate storage; deprotection allowed just before formulation into technical concentrate.

    Final product types

    • Alkyne-substituted herbicide active ingredients
    • Fungicide intermediates
    • Control substances for crop residue trials
    • Stabilized technical active concentrates

    4. Advanced Silicone and Siloxane Material Development

    Silicone producers employ TMSA as a functional alkyne source for the end-capping and modification of polysiloxane chains, yielding cross-linkable or graftable silicone fluids and elastomers. This role is essential in imparting further reactivity for custom silicone networks. Production teams charge TMSA to reaction vessels after achieving partial polymerization; typical addition points must avoid moisture and acid to prevent premature deprotection or hydrolysis, which influences network uniformity and final mechanical profile.

    Industry compliance standards

    • ASTM D412 for silicone elastomer properties
    • ISO 10993-5 for biocompatibility (medical-grade silicones)
    • REACH Regulation (EC) No 1907/2006 for registration of substances
    • ISO 9001:2015 for finished material QC

    Typical usage ratio

    • Typically 0.2–0.5 wt% relative to polymer precursor for end-capping; higher ratios up to 1.5 wt% applied in functionalized silicone grades. Actual charge depends on targeted modification levels.

    Downstream process integration

    • Added at late-stage of siloxane equilibration or hydrosilylation steps; purified product is processed into gums, fluids, or cross-linked elastomers, followed by postcuring and compounding as per end-use.

    Final product types

    • Functionalized silicone rubbers
    • Alkyne-modified silicone fluids
    • Custom siloxane copolymers for medical or electronic grades
    • Elastomeric coatings and adhesives

    5. Fine Chemical and Dye Intermediate Production

    Manufacturers of high-purity fine chemicals and specialty dyes make use of TMSA to introduce terminal alkyne groups into complex aromatic scaffolds. This enables subsequent click chemistry reactions or azo-couplings for custom labeling reagents, diagnostic stains, and advanced dye precursors. Process chemists operate under detailed analytical protocols to document residue profiles, with batch-scale optimization aimed at maximizing throughput while minimizing cross-contamination with nonvolatile organosilicon byproducts.

    Industry compliance standards

    • ISO 17025-accredited analysis for batch purity
    • EN 71-3 for colorants in toys (for downstream manufacturers)
    • OEKO-TEX Standard 100 (for textile dye intermediates)
    • REACH substance registration for EU trade

    Typical usage ratio

    • 1.0–1.3 equivalents, tuned to substrate functional group loading and target degree of functionalization.

    Downstream process integration

    • Charged during cross-coupling of aromatic halides or diazonium intermediates; product is subsequently isolated and deprotected before downstream reaction or dye coupling is initiated.

    Final product types

    • Custom azo and anthraquinone dye precursors
    • Diagnostic labeling reagents
    • Alkyne-functional fine chemical intermediates
    • Advanced pigments for inkjet and specialty printing
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    Certification & Compliance
    More Introduction

    Trimethylsilylacetylene: What Years of Production Have Taught Us

    Direct Experience Shaping Best Practice

    Working hands-on with trimethylsilylacetylene means more than delivering a reagent described on paper. Over the years, our chemists and process operators have seen how small changes during synthesis and purification influence performance in the lab or on the production floor. There’s a story behind each batch, and the lessons learned shape the latest improvements. Ask around the plant: folks remember when raw material purity used to create headaches downstream, or how a minor tweak in the distillation protocol changed the color and reactivity profile for the better. Customers welding together complex molecular architectures want every drop of trimethylsilylacetylene to behave the same, scale after scale, so experience and consistency become more valuable than any one set of specifications.

    What Goes Into Consistent Quality

    Every batch of trimethylsilylacetylene leaving our reactors draws on years of close attention. Purity doesn’t just mean hitting a number on a gas chromatograph—our teams have learned to keep an eye on trace moisture, which can cause precious catalysts in cross-coupling chemistry to lose their punch. Repeat Karl Fischer titrations taught us that extra-low water content leads to fewer headaches in downstream applications. Storage methods matter just as much as what happens inside the reactor. Glass containers, tightly sealed under inert gas, cut down the risk of air or moisture intrusion between production and use.

    What’s in the drum isn’t the whole story, either. Customers send samples back with feedback, and those discussions push us to look at factors that typical QC checklists once ignored. Over time, we’ve tackled traces of siloxanes and handled odor complaints by adding one more run through activated alumina. We all get busy. Speed tempts shortcuts, but one slip in handling echoes all the way down a production line or through an academic research group.

    Transformative Role in Synthesis

    Trimethylsilylacetylene has become a reliable building block across specialty chemicals, pharmaceuticals, electronic materials, and new materials research. What surprises new chemists is just how much versatility fits inside this compact molecule. In industrial production, Sonogashira and Cadiot-Chodkiewicz couplings account for a large chunk of the demand, especially as more drug candidates and OLED components rely on alkyne linkages. Flexible electronics, light-emitting materials, and advanced polymers all lean on precisely functionalized alkynes, and trimethylsilylacetylene delivers that functionality with fewer side reactions than many alternatives.

    Handling safety matters. Acetylene itself causes concern in many plants, so the silyl group serves as a protective barrier—a crucial detail when running large-scale reactions prone to explosions or runaway exotherms. Instead of guessing how much unprotected acetylene is generated on the fly, engineers can monitor and remove the silyl group under gentle conditions. Even in small academic labs, the ease with which the silyl protecting group can be introduced or removed means students focus on the chemistry they want rather than cleaning up cascades of side-products.

    Performance Matters More Than the Label

    Ask anyone making organosilicon building blocks: there’s a wide gulf between theoretical purity and the demands of advanced catalysis. Some users report that a 98% claimed content doesn’t always guarantee success with sensitive palladium- or copper-catalyzed couplings. Lessons from failed reactions, fouled columns, or inconsistent product spectra point straight to trace impurities. In our own QC labs, running standards side-by-side with production samples has uncovered issues with halide content, even when overall purity numbers looked similar. It’s not enough to chase one metric—you need to match the impurity profile to your downstream chemistry.

    For years, some buyers compared trimethylsilylacetylene mainly on price and claimed specs. Customers with long development timelines—including some of the most successful biotech and specialty chemical firms—came to value batch reproducibility. The biggest shift came from new diagnostics techniques, like LC-MS, that revealed subtle contaminants affecting reaction performance. This changed the conversations between supplier and customer. The most experienced chemists in our group know it’s not about putting a higher number on a certificate. It’s about showing proof that your reagent won’t derail late-stage synthesis or manufacturing consistency.

    What Sets Trimethylsilylacetylene Apart From Its Cousins

    Straight acetylene might appear cheaper, but storing and handling it brings layers of regulatory risk, safety concerns, and logistical complexity. We’ve fielded countless calls from commercial buyers whose processes required switchovers from acetylene or propyne. The difference becomes clear in the shipping requirements: a stabilized, silyl-protected form avoids extra costs for pressure-rated vessels or strict transportation limits. This stability also sidesteps problems in everyday bench chemistry by reducing peroxide build-up and minimizing hazardous byproducts.

    Compared to unprotected terminal alkynes, the trimethylsilyl group delivers more than a cosmetic function. It suppresses undesirable side reactions, especially in metal-catalyzed processes, which keeps yields high and purifications simple. Other protecting groups—such as tert-butyldimethylsilyl—offer different removal conditions, but in most real-world settings, the trimethylsilyl group wins out for its balance between protection and the ease with which it can be cleaved, typically using mild fluoride sources or even basic methanol. For companies scaling organosilicon building blocks, fewer process steps translate to faster scale-up and lower costs, not just slick chemistry on paper.

    Feedback and Continuous Improvement: An Ongoing Story

    Chemistry never stands still, and neither do production protocols. Customers expect reliability but crave improvement when chemistry moves in unpredictable directions. Once, a formulation scientist pointed out sporadic performance changes after switching to a different purification protocol. The result triggered months of side-by-side trials back in the plant, examining everything from distillation rates to variability in silica quality for final polish. These cycles of real-world feedback steer us towards more robust practices. We’ve invested in automation for some tasks, but plenty still comes down to the minute judgment of a skilled operator who knows just how a batch should look or smell.

    As equipment evolves, better temperature control and inerting reduce the odds of introducing micro-level impurities. Our bulk customers push for better pH stability and less batch-to-batch drift. Syntheses that ten years ago could tolerate minor fluctuations in supply quality now run with such tight windows that we keep extra logs open for every parameter, beyond those the auditors might ask for. Every yearly review brings new questions, more trace analysis, and the ongoing challenge of tightening standards to match what researchers and production chemists demand.

    Usage Stories From the Field

    Pharmaceutical intermediates bring in continual business, but our favorite anecdotes come from surprising corners of chemistry. Once, a customer working in optoelectronics shared that a seemingly minor impurity produced unexpected fluorescence on TLC plates. More than trivia, these stories highlight how downstream product performance often hinges on details in reagent purity that only show up after iterative feedback between bench and plant. Some of our smallest buyers—university research groups unable to order by the drum—end up making key discoveries about surface chemistry or cross-coupling selectivity, feeding process tweaks back up the supply chain.

    One production manager in a specialty polymer facility traced unpredictable yields to minute variations in moisture content and pushed us to redesign part of the packaging workflow. Upgrades followed, with every lid-seal and inerting operation scrutinized. Now, even tracked shipments minimize timeouts in adverse humidity and warehouse conditions. These fixes might look trivial from the outside, but the consistent end result provides a platform for scale-up, regulatory clearance, and smooth commercial launches for partners from Boston to Basel.

    Beyond the Bottle: Supporting Innovation

    One of the rarely acknowledged challenges with sensitive reagents is integrating them into workflows that value both safety and agility. While bulk buyers tend to automate every step, small research-driven teams need the flexibility to handle small quantities without elaborate infrastructure. Years of feedback from academic and startup partners have shaped not just the reagent itself but also the packaging. Screw-topped septum bottles, factory-purged under dry nitrogen, show up in chemical catalogs because enough research partners reminded us what rapid-access, no-waste dispensing can actually mean at the bench.

    Supporting innovation sometimes means responding to unpredictable routes and new reaction classes. The last five years have brought a spike in photochemical applications, where the tolerance for any UV-active impurity drops even further. We’ve learned the hard way that scaling old packaging solutions won’t cut it—a vapor-impermeable, UV-blocking container might cost more upfront, but it secures months of shelf-life and much lower reject rates. These changes might not show up on a spec sheet, but feedback from the field makes clear what matters in practice.

    Managing Risk: Supply Chain and Regulatory Perspective

    Many industrial users of trimethylsilylacetylene have watched global supply chains tested by sudden bottlenecks and regulatory updates. In the last few years, the importance of in-house manufacturing and traceability has only grown. Careful logs track not just the origin of each input, but the route every container takes from synthesis line to warehouse. Larger companies lean hard on origin documentation for downstream audits, especially when their own customers demand evidence of best-in-class stewardship.

    Production teams face constant audits on employee safety, emission standards, and emergency preparedness. We’ve found that solid systems for environmental monitoring—routine scrubber checks, waste solvent disposal upgrades, and staff training in emergency procedures—build not just compliance, but trust with our partners. Being the original manufacturer doesn’t just mean making the molecule; it means backing it up with transparent, validated process records when a quality manager comes calling.

    Technical Support: Sharing Expertise Across Borders

    Chemists and engineers running large-scale processes want technical conversations with peers who know what goes right—and what can go wrong—in real plant environments. Customers still surprise us with edge-case reactions, cleaning protocols, or storage questions, especially as new markets open or regulations shift. Some of our oldest client relationships were built not on price, but on long email threads trading troubleshooting tips over solvent removal or best dosing practices. Over the years, experience has taught us that prompt, knowledgeable support makes all the difference on a hectic production day or when scale-up challenges eat into tight deadlines.

    Our own synthesis crews draw lessons from these field stories. Every set-back, from overpressure in storage tanks to a fume event on a hot day, prompts a fresh review of existing protocols. Drawing on multiple decades of accident reports, old notebook entries, and customer insights, the drive to strengthen and simplify handling practices runs deep. Even with ongoing automation and process control improvements, the best results still depend on skilled people knowing precisely how to spot and correct issues before they snowball.

    Looking Toward the Future: Trimethylsilylacetylene in Modern Chemistry

    Demand for trimethylsilylacetylene continues to grow, with more industries leveraging its unique combination of stability and reactivity. Electronic materials, high-value diagnostics, and new therapeutics depend on reagents whose quality profile can support breakthroughs without introducing unwelcome surprises. Our company invests heavily in method development because we know every innovation begins with reliable building blocks. As environmental standards tighten and customers lean into greener processes, chemists expect suppliers to take an active role in reducing solvent loads, recycling waste, and moving away from legacy methods that fail to meet future needs.

    Collaboration sits at the heart of every major improvement in reagent supply. The dialogue between manufacturer and end-user shapes not only what comes off the production line, but how quickly that knowledge cycles back for future batches. Trimethylsilylacetylene isn’t just a line on a catalog. In the hands of skilled chemists, underpinned by real-world feedback and continuous adaptation, it becomes part of a larger story—a shared effort to push the boundaries of what molecular design and synthetic chemistry can achieve.

    FAQs From Years in the Field

    Some of the best questions don’t fit in a typical FAQ sheet but come from on-the-ground challenges. We get inquiries about maximum bulk storage times at outdoor depots, strategies for preventing cross-contamination in automated dispensers, and best practices for freeze-thaw cycles on partial containers. The most challenging ones often come from customers pushing the limits: “Can we recover off-spec material via vacuum distillation?” “What’s the minimum reliable detection limit for copper and halide contaminants?” “Any recommendations for scaling fluoride deprotection to 200 kg?” Every question earns a real answer, influenced by firsthand lab trials and lessons learned over years of handling and trouble-shooting.

    Reviewing practical challenges with trimethylsilylacetylene leads us back to the central lesson that quality and customer needs evolve together. Developing new usage protocols, refining analytical standards, and investing in better packaging or smart logistics—all these changes grow out of real conversations, not just regulatory paperwork. Building on experience and paying attention to what serious chemists and production engineers face each day keeps us prepared for the next wave of demand and the next round of industry-wide advancements.