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HS Code |
895858 |
| Name | 3-Methyl-1-Butyne |
| Cas Number | 598-23-2 |
| Molecular Formula | C5H8 |
| Molecular Weight | 68.12 g/mol |
| Iupac Name | 3-methylbut-1-yne |
| Appearance | Colorless liquid |
| Boiling Point | 54-55 °C |
| Melting Point | -105 °C |
| Density | 0.687 g/mL at 25 °C |
| Refractive Index | 1.392 |
| Flash Point | -25 °C |
| Solubility In Water | Insoluble |
| Odor | Characteristic, sweet |
As an accredited 3-Methyl-1-Butyne factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | The 500 mL brown glass bottle features a tightly sealed cap, hazard labels, and clear labeling identifying the contents as 3-Methyl-1-Butyne. |
| Shipping | 3-Methyl-1-butyne is shipped in tightly sealed containers, typically under an inert atmosphere. It is classified as a flammable liquid and must be transported according to relevant hazardous materials regulations. Proper labelling, use of compatible packaging, and protection from heat, sparks, and open flames are essential during shipping to ensure safety. |
| Storage | 3-Methyl-1-butyne should be stored in a cool, dry, well-ventilated area away from sources of ignition and incompatible materials such as strong oxidizers. Keep the container tightly closed and properly labeled. Store in a flammable liquids cabinet and protect from sunlight and moisture. Use only non-sparking tools and equipment, and ground all containers when transferring the chemical. |
Applications of 3-Methyl-1-Butyne in Industrial Manufacturing3-Methyl-1-Butyne is a valuable intermediate used in synthetic organic chemistry and specialty industrial production. As the original manufacturer, we ensure strict quality controls and traceability from batch to batch. Below, we detail its most recognized and established industrial applications, each with dedicated compliance, formulation, integration, and end-use references. 1. Agrochemical Intermediate SynthesisIn the agrochemical sector, 3-Methyl-1-Butyne serves as a key building block in the manufacture of selective herbicides and plant protection agents. Its C5 alkyne structure enables specific carbon-carbon coupling reactions, especially for introducing branched-chain substituents. Our clients use this material in catalytic alkynylation and as a precursor in the preparation of advanced intermediates for active agro ingredients. Quality control includes analytical verification of purity and reactivity to ensure consistent results in final product synthesis. Industry compliance standards
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2. Pharmaceutical Active Ingredient SynthesisLeading pharmaceutical manufacturers use this compound as a functional alkyne donor in the synthesis of certain API precursors. The compact triple-bonded chain allows for controlled modification of molecular frameworks via Sonogashira or other transition metal-catalyzed couplings. Our supply is tailored for stringent low-impurity specifications demanded in cGMP environments, and is fully lot-traceable for regulatory audits and validations. Industry compliance standards
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3. Organic Laboratory Reagent SupplyChemical research institutes and specialty synthesis labs regularly depend on 3-Methyl-1-Butyne as a reagent for alkyne addition, cyclization, and advanced mechanistic studies. Consistent purity, certified reference material status, and batch-level spectral documentation have made it well adopted for method development and pilot trials. Our product undergoes additional analytical screening to meet common R&D and academic quality requests. Industry compliance standards
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4. Catalyst & Ligand Precursor ManufacturingChemical processing firms employ 3-Methyl-1-Butyne to introduce terminal alkyne motifs in the preparation of ligand frameworks and specialty catalysts. The compound’s structure supports the formation of metal-alkyne complexes, essential in homogeneous and heterogeneous catalytic systems. Precision dosage and low water content are critical for ensuring catalyst activity and stability in downstream use. Industry compliance standards
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5. Polymer Modifier and Additive ProductionPolymer manufacturers utilize 3-Methyl-1-Butyne as a functionalizing agent for chain modification in specialty polymer formulations. The terminal alkyne facilitates precise grafting onto main chains or side groups, contributing to improved flexibility, crosslinking, or processability in target resins. Our supply meets specification for minimized peroxides and unsaturated residues to ensure safe use in reaction extrusion and emulsion preparation. Industry compliance standards
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6. Fine Chemical Building Block ManufacturingThe specialty chemicals sector relies on 3-Methyl-1-Butyne as a modular building block for flavor, fragrance, and advanced material intermediates. Its ability to undergo selective hydrogenation, oxidation, or halogenation allows for the tailored synthesis of branched aldehydes, alcohols, and other high-value molecules. We support custom synthesis requirements with individually qualified lots and supporting analytical data for precise downstream conversions. Industry compliance standards
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Competitive 3-Methyl-1-Butyne prices that fit your budget—flexible terms and customized quotes for every order.
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Inside our manufacturing facility, 3-Methyl-1-Butyne has moved from a niche specialty to a mainstay for customers looking for reliable performance in their synthetic pipelines. By building our process around high-purity hydrocarbon chemistry, our team has seen firsthand how the smallest variances in precursor quality impact downstream transformations. This product, also known by its chemical formula C5H8, is a key alkyne that consistently delivers dependable results in both academic and industrial settings.
Manufacturing this compound involves close attention to process controls and rigorous purification steps. No matter the batch size—whether we receive a request for a few hundred grams for development or several tons for production support—our chemists verify material identity every step of the way, starting from raw materials through to the finished output. From column chromatography to GC-FID purity checks, we retain strict controls over final quality, documenting each batch as part of our ongoing commitment to traceability and reproducibility.
Our standard offering for 3-Methyl-1-Butyne includes material that passes stringent targets above 98% purity, delivered as a colorless, volatile liquid with distinct olfactory notes. Boiling point runs approximately 54–58°C; this value comes from our firsthand lab distillations and is supported by published chemical references. Our packed columns and advanced condenser systems let us reliably isolate product at these points, ensuring the thermal stability that our downstream partners expect.
We regularly support requests for more detailed analysis, such as residual solvent content and UV/Vis scans, because major customers need more than basic purities reported on a COA—especially those in pharmaceutical development or advanced materials research. Whenever possible, our technical staff work in partnership with the end-user’s chemists, comparing spectra and providing extra characterization data, so discrepancies can be resolved before a kilogram leaves our doors.
From a synthetic chemistry angle, it becomes clear that 3-Methyl-1-Butyne’s triple bond reacts sensitively to oxygen, moisture, and transition metal residues. We address this through controlled atmospheric conditions in our reactors, as well as specialized drying and inert packaging. Over several years, we learned that cross-contamination from batch reactors is a source of headaches. Repeated washes using low-boiling hydrocarbon solvents help sweep away residuals from previous campaigns. Our technicians inspect reactors between runs, particularly filter elements, to control for sodium, potassium, and iron traces. These minor contaminants can catalyze side-reactions or generate colored byproducts, so we stay vigilant in all batch operations.
Sometimes buyers ask why our pricing seems higher than redistributed alternatives. There are simple reasons—direct manufacturers invest aggressively in monitoring, documentation, and waste minimization, while traders may not. Every adjustment we make, whether in feedstock source, equipment cleaning, or handler training, shows up as a slight cost uptick. Many longtime customers have told us it makes a difference: their chromatography runs cleaner, yields stay higher, post-synthetic purification is simplified, and they avoid inconsistent results.
3-Methyl-1-Butyne offers reactivity that attracts both R&D groups and scale-up chemists—primarily for coupling chemistry. Its carbon-carbon triple bond allows insertion, addition, and cyclization reactions with broad functional group tolerance. We’ve supported customers in agrochemical development who use this compound as a building block for innovative herbicides. Pharmaceutical researchers employ it for early-stage intermediate synthesis when testing new scaffolds and analogs of complex molecules. Polymer scientists find it invaluable in designing reactive sites for specialty plastics, adhesives, and electronic materials.
Anecdotal feedback from a university group conducting palladium-catalyzed cross-coupling reported that they moved to our batch because it gave narrower GC retention bands, reducing impurities that hindered their polymerizations. Industrial teams doing large-scale Sonogashira reactions with aromatic halides benefit from our extra pure 3-Methyl-1-Butyne, because their batch returns run without the troublesome “tails” seen with impure lots. These stories reinforce why meticulous manufacturing matters—small differences at the alkyne stage carry through to final product reproducibility.
Another set of customers purchase our product for use in flavor and fragrance discovery work. Alkyne functional groups can be modified late-stage to create complex molecular arrays. In collaboration with flavorists, we’ve fine-tuned delivery containers and batch sizes to help maintain stability during extended storage, as even trace hydrolysis shifts odor profiles in finished blends.
We supply both sealed glass ampoules for lab-scale usage and stainless steel containers for bulk transport. This attention to packaging comes directly from failed field trials, where leaky plastic containers led to peroxide formation that could have compromised safety and shelf life. It’s one of those details that’s learned through experience—packaging matters as much as the chemical inside.
As a manufacturer, we’ve observed that small differences in 3-Methyl-1-Butyne quality ripple outward. Even a few tenths of a percent of water or oxygen leads to double-bond migration and partial polymerization, especially if the material sits for weeks before use. Researchers routinely note that knockoff or “technical grade” alkynes hinder their analytical quantitation and complicate their kinetic studies. Technical and specification grade labelling can be ambiguous, so we work to clarify our batch data and trace raw material origins.
One recurring challenge involves requests for custom blends or modified purities. For instance, some synthetic chemists deliberately require trace stabilizers, while others demand absolute absence for catalyst compatibility. We train our operators and document every batch variable so that users get a clear idea of what is—and isn’t—present. Over time, this transparent approach helps forestall post-purchase disappointment or surprises, especially for those developing regulated products.
Current regulatory frameworks don’t always capture every relevant impurity or physical property. So, as manufacturers, we add our own extra scrutiny—using stricter internal specifications and more frequent batch sampling. Consistent with principles of experience and expertise, we treat deviation from published properties as a red flag, and only release product after confirming all analytical numbers line up with customer needs.
We regularly answer questions about how 3-Methyl-1-Butyne compares with better-known alkynes, such as propyne or 1-pentyne. The additional methyl group on 3-Methyl-1-Butyne gives this compound a unique balance of reactivity and stability. Compared to propyne (methylacetylene), our product resists biological degradation and evaporative loss a bit better—a direct result of higher molecular weight and boiling point.
From a reactivity standpoint, 1-pentyne and 3-Methyl-1-Butyne display differences in regioselectivity during addition or substitution reactions. In our production-scale labs, we’ve seen that the presence of the methyl group blocks unwanted routes, leading to a cleaner product profile. For researchers doing Grignard or organometallic work, this subtle difference translates to improved product isolation and shorter reaction times.
In polymer work, the methyl-branched alkyne offers improved chain incorporation compared to straight-chain homologues. Colleagues in advanced polymer research have noted that this structure helps impart flexibility and toughness to specialty elastomers. In side-by-side tests, our clients reported increased yields and easier molecular weight control versus the unbranched alternatives.
Partnership means more than shipping a drum or a vial. Synthetic challenges pop up even with the most robust chemicals. Fielding calls about off-odors, precipitation, or inconsistent analytical results has taught us the value of candid customer dialogue. We keep open communication channels, encouraging labs to contact us at the first sign of trouble. Sometimes problems trace back to shipping temps or handling protocols, not intrinsic chemical flaws.
Internally, we adjust storage and transport protocols based on what we learn from customer discussions. More than once, trouble shooting a consistency issue led us to re-examine valve materials or tweak our nitrogen blanketing concentrations. Learning from these real-world use cases ensures that future batches meet expectation and save time on both ends.
We offer stability studies on request, especially where long supply chains or unusual storage conditions are involved. Our team regularly shares stability data under several climate conditions, drawing on our own accelerated aging tests. In high humidity settings, we advise on optimal repackaging and short-term storage to retain alkyne content and prevent polymerization. Our experience comes not just from theoretical models, but repeated feedback cycles with development and process chemists across industries.
By working directly with researchers, our manufacturing staff have seen firsthand just how much product performance depends on supply chain reliability and batch-to-batch consistency. End-users report that even small variations in water content or impurity levels cause headaches: variation in GC or NMR profiles, surprises in reaction optimization, and lower yields in scale-up trials. Our operators feel the pressure, knowing that a single inconsistent drum could set a customer’s project back by weeks.
We’ve observed a steady increase in requests for documentation—such as residual solvent reports, impurity assays, and full chromatographic data. Far from being a burden, this trend has helped us focus on transparency in reporting and continuous process improvement. Every time a customer finds an anomaly, our teams roll up their sleeves, track down root causes, and document what’s learned for future runs. This cooperative problem-solving makes 3-Methyl-1-Butyne not just a simple reagent, but an investment in reproducibility and trust.
Looking across the specialty chemicals landscape, customers increasingly demand not just performance, but also traceable data, supply stability, and open support. Regulations on impurities, shipping, and end-user documentation keep evolving, putting extra focus on upstream controls. Our experience running QA audits, facilitating customer inspections, and supplying material under new standards has kept us ahead of the curve. Seasoned buyers look beyond rock-bottom prices, valuing assurance that every batch meets published numbers with supporting documentation.
We anticipate growing demand from sectors like high-performance polymers and new pharmaceuticals, where scale-up means microscopic impurities can become large-scale roadblocks. Our sales and technical teams guide customers not only on specs, but on operational logistics, such as delivery cycles, storage space, and sample stability.
We maintain active engagement with research consortia and standards-setting bodies, so that our internal guidance aligns with the latest market and regulatory developments. As soon as updated guidelines surface, we adapt our analytical toolkit and batch release criteria to match.
Working with highly volatile and reactive intermediates teaches respect for safe handling and storage. Over the years, we’ve responded to field incidents involving off-spec product caused by storage under inappropriate temperatures, or container breaches during shipment. Learning from these events, we’ve implemented double-seal packaging, tamper-evident closures, and routine stress testing of shipment units under varied climate exposures.
For learning institutions and process plants, we always provide detailed recommendations: cool, dry storage away from initiating metals, regular rotation of stocks, and avoidance of plastic containers with ambiguous permeabilities. These measures prevent loss of volatile components and unintended byproduct formation.
Safety data evolves hand in hand with process experience. Whenever a new reactivity or incompatibility is uncovered, we update our product literature and notify affected end-users. Over time, this results in a living set of best practices, shaped as much by field reality as by literature citations.
Looking forward, the role of compounds like 3-Methyl-1-Butyne in high-value synthesis will keep growing. From our vantage point on the manufacturing floor, the race for purer, better defined, and more reliably sourced intermediates is intensifying. More clients ask for statistically supported, batch-verified consistency—a shift mirrored in digital traceability systems and smarter lab analytics.
We are expanding our capabilities in parallel. More pilot runs, better instrument calibration, and closer customer collaboration drive our evolution. As new applications arise—from microelectronics to next-generation agrochemicals—we’re increasing our analytical reach and flexible production schedules to meet fast-changing requirements. Our role is not just providing a molecule, but supporting breakthroughs in process reliability and reproducibility.
We draw on what we’ve learned: meaningful chemical supply depends not just on knowing what goes into a drum, but on cultivating open, respectful relationships with every user, and responding rapidly to changing needs and technical obstacles. With every batch of 3-Methyl-1-Butyne that leaves our floor, we meet not only a standard, but our commitment to the scientists and engineers turning ideas into real-world solutions.