|
HS Code |
997757 |
| Iupac Name | 1-Buten-3-yne |
| Molecular Formula | C4H4 |
| Molar Mass | 52.08 g/mol |
| Cas Number | 928-49-4 |
| Appearance | Colorless gas |
| Boiling Point | -6 °C |
| Melting Point | -123 °C |
| Density | 0.66 g/cm³ (at 0 °C) |
| Chemical Structure | CH2=CH–C≡CH |
| Solubility In Water | Slightly soluble |
| Flash Point | -38 °C |
| Refractive Index | 1.371 (estimate) |
| Pubchem Cid | 12216 |
| Vapor Pressure | 760 mmHg (at -6 °C) |
| Synonyms | Vinylethyne |
As an accredited 1-Buten-3-Yne factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Amber glass bottle containing 100 mL of 1-Buten-3-yne, securely sealed, labeled with hazard warnings and chemical information. |
| Shipping | 1-Buten-3-yne should be shipped in tightly sealed, compatible containers under a nitrogen or inert gas atmosphere to prevent polymerization and moisture contamination. It must be labeled as a flammable liquid and transported according to applicable regulations, such as DOT or IATA, with relevant hazard labels and documentation. Store away from heat sources. |
| Storage | 1-Buten-3-yne should be stored in a cool, dry, and well-ventilated area, away from sources of ignition and incompatible materials such as strong oxidizers. Store it in tightly sealed containers made of materials compatible with alkynes and unsaturated hydrocarbons. Keep the storage area equipped with proper fire suppression systems, and ensure containers are clearly labeled and protected from physical damage. |
Applications of 1-Buten-3-Yne in Industrial Manufacturing1-Buten-3-yne, a reactive alkyne-olefin compound, serves as an essential intermediate in various advanced industrial synthesis scenarios. As a primary manufacturer, we provide this material to specialized downstream industries for targeted syntheses, each requiring stringent adherence to process parameters, unique compliance protocols, and precise integration within reaction trains. Below are detailed application segments based on real production practices in global markets. 1. Synthesis of Specialty Polymers for Electronic Materials1-Buten-3-yne is a key monomer or comonomer for developing conjugated polymers used in flexible electronics, OLED displays, and advanced sensor devices. Industrial clients covalently integrate this compound to introduce reactive sites and enhance electron transport pathways in the polymer backbone, supporting reproducible thin-film and device fabrication. Typical use mandates cleanroom or controlled atmosphere handling to avoid inhibitor and impurity artifacts that could compromise downstream conductivity and optical properties. Industry compliance standards
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2. Intermediate for Active Pharmaceutical Ingredient (API) SynthesisPharmaceutical producers source 1-Buten-3-yne as a reactive intermediate in the multi-step synthesis of certain API scaffolds, such as substituted pyrroles and thiophenes, that require establishing a terminally unsaturated carbon backbone. The molecule participates in cyclization, Sonogashira coupling, and other alkynylation protocols, where reaction selectivity and purity directly affect subsequent yields and regulatory qualification under cGMP frameworks. Industry compliance standards
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3. Modifier in Synthetic Lubricant AdditivesDownstream formulators incorporate 1-Buten-3-yne as a molecular modifier for advanced synthetic lubricant additives. The compound acts as a chain-building agent in the synthesis of antiwear and antioxidant packages used in high-performance transmission fluids and engine oils. It provides enhanced thermal stability and supports formation of high-viscosity index polymeric additives, extending lubricant service life in severe operating environments. Industry compliance standards
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4. Building Block for Agrochemical SynthesisProducers of modern agrochemicals utilize 1-Buten-3-yne as a foundational building block during the design of selective herbicides and fungicides. Its triple bond facilitates installation of unique alkyne-functionalized moieties that impart mode-of-action selectivity, photostability, or enable click-chemistry-based bioconjugation. Manufacturing lines require precise stoichiometry and stringent monitoring to ensure no residual acetylenic impurities in bulk technical grade active ingredients. Industry compliance standards
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We focus on more than just producing bulk volumes of chemicals; our work begins with paying attention to what goes on in the reactor and ends with hands-on support at the user’s site. In this everyday workflow, 1-Buten-3-yne takes a unique position among the unsaturated hydrocarbons. Our engineers and chemists have handled its synthesis, purification, and logistics for demanding applications across several sectors. We have seen the benefit of knowing your material—not simply on paper, but through its behaviors in the flask and the reactions that follow downstream.
1-Buten-3-yne, a linear four-carbon molecule with the formula C4H4, offers both an alkyne and alkene function inside a single backbone: one triple bond and one double bond. This molecular arrangement doesn’t just look interesting in a textbook—it shapes real technical opportunities for research, polymerization, pharmaceutical input, and advanced material development.
We refine 1-Buten-3-yne to a standard that meets the needs of those looking for consistency in reactivity. The product we deliver most frequently achieves purity above 99%, with isomeric and oligomeric byproducts kept well below 1%. Our teams use rigorous fractionation and gas-phase chromatographic controls during production. This isn’t an arbitrary number on a specification sheet; our experience in continuous processing reduces batch-to-batch drift, so researchers and formulators can focus on their work instead of troubleshooting for subtle impurities.
Pressure ratings, cylinder types, and valve configurations follow global safety standards since 1-Buten-3-yne is a volatile, flammable compound. We prepare it in high-integrity pressurized cylinders, shipped after serial leak-checks, moisture tests, and odorant-free protocols to suit critical downstream synthesis or instrument calibration.
Over decades of direct feedback, we find that 1-Buten-3-yne’s most impactful use appears in specialty chemical synthesis where linear unsaturation unlocks creative pathways. Our customers in the pharmaceutical sector reach for this molecule when they need a clean, reactive backbone for constructing fused heterocycles and modified alkenes. Chemists cite its predictable behavior in cycloaddition and cross-coupling reactions.
Polymer specialists use it as a controlled monomer to help introduce crosslinks or functional sites, lending new physical properties to experimental materials. We’ve followed product from our plant floor to academic labs, pilot plants, and even scaled manufacturing projects for OLED substrates and membranes. Blended with other unsaturated hydrocarbons, it forms block segments and copolymer chains with unique uses in electronics, adhesives, and advanced coatings. Our collaborative R&D with partners often brings out niche opportunities—every processor has stories about new performance thresholds and analytical puzzles they cracked using 1-Buten-3-yne.
Plenty of alkynes and alkenes line up on a product list, but only this molecule tucks both bond types in a linear four-carbon chain. Our tech staff has worked through comparative tests with related compounds like butadiene, acetylene, and propyne. The simultaneous presence of both a triple and a double bond in a compact structure greatly expands how it reacts compared to hydrocarbons with only one type of unsaturation.
For example, acetylene and propyne both deliver the sharp reactivity of C≡C groups, but lack a handle for alkene-based chemistry without further modification. On the other hand, butadiene has easy access to diene reactivity but its allene nature makes for different selectivity in addition chemistry. In our customer trials, 1-Buten-3-yne often wins out for two reasons: it gives controlled addition across the double bond while keeping the triple bond for subsequent modification, or it enables tandem reactions where two types of catalysis are possible in a single step. Whether a lab is scaling up a catalyst screen, or a manufacturer is targeting a new reactive intermediate, the built-in dual functionality slashes steps—and cost—in complex syntheses.
Technically, we notice an impact on process parameters as well. Triple bonds can pose hazards of polymerization in the valve or pipeline, especially under pressure, but our containment protocols for 1-Buten-3-yne have stood the test of intense regulatory review and customer audit. The molecule’s volatility sits between classical small alkynes and longer-chain dienes, so our product integrates smoothly into both gas- and liquid-phase reactions. This flexibility offers a supply-chain advantage: users need not retool hardware or change reactors, making transfer from lab to plant direct and cost-effective.
Anyone who has carried out the synthesis of butenynes knows about the energy balance: separating pure 1-Buten-3-yne from side products such as vinylacetylene or butadiene requires patient fractionation and real-time monitoring. Our operations staff has fine-tuned process controls to catch thermal runaways, as small slip-ups cause coke formation or trigger safety alarms. We train everyone on-site about the risks of peroxide formation or unwanted spontaneous reactions that can occur if gas cylinders are left stagnant at warm temperatures.
Leakage control is another hard-earned requirement. Once, years ago, a faulty relief valve in a customer’s setup vented trace material in a closed lab. Thanks to early alert protocols, the team evacuated before exposure limits approached, but we took the lesson to heart: every batch leaving our facility now passes pressure cycling and valve compatibility tests designed beyond regulatory minimums. We openly share procedures and test results with our customers to reinforce transparent partnership.
Another unexpected discovery arose from analytics. Routine GC-MS sometimes throws off subtle impurity peaks co-eluting with 1-Buten-3-yne because of its unique fragmentations. After comparing internal standards and switching to high-resolution techniques, we now cross-reference batch certificates with both chromatography and NMR, saving our clients unnecessary troubleshooting. Continuous feedback from formulators and analytical chemists at the point of use shapes how we archive production data on every batch.
As a direct manufacturer, we face scrutiny from environmental agencies and client sustainability teams. 1-Buten-3-yne’s volatility means even small fugitive emissions matter. Our installation uses nitrogen-blanketed transfer tanks, atmospheric controls on unloading arms, and active monitoring for volatile organic compounds well below actionable thresholds. Over the years, we have reduced flaring and implemented vapor recovery systems to limit discharge.
We invest in continuous training so all operators manage both the hazard profile and the waste minimization expected for a modern chemical plant. Solvent streams and off-gas mixtures involved in distillation or purification go through state-of-the-art treatment—activated carbon beds, oxidizers, and digital leak detection. As the regulatory landscape tightens, our engineers and EHS teams look ahead to new process configurations. We participate in chemistry associations to share incident data, learning where minor improvements in valve seating or compound stabilization prevent headaches down the line.
On recovery and recycling, we support users who want guidance on returning unused 1-Buten-3-yne for safe destruction or distillation to new purity specifications. Real-world use generates heel gases and partial residuals. Our approach helps avoid the unnecessary venting or incineration of lightly contaminated streams. Professional chemical users looking to minimize footprint get detailed consultation from our technical support, grounded in our actual infrastructure, not a generic web form.
Researchers—academic and commercial—lean on direct manufacturer communication instead of relying on secondhand details. One frequent question: how does 1-Buten-3-yne perform in coupling reactions where both the double and triple bond could react? Our process chemists have helped troubleshoot batch consistency, explain selectivity drift, and suggest conditions when bench-top experiments don’t translate smoothly to pilot scale. We listen to feedback, then adjust purification or storage based on those results.
In pilot and commercial environments, manufacturing supervisors increasingly want to track every input’s origin and processing history for regulatory and quality assurance filings. Our supply chain documentation reflects an unbroken line from precursor procurement, through in-house production, to final cylinder filling and dispatch. This reduces fire drills for clients working under ISO or FDA validation, and every delivered cylinder comes with the backing of a plant that responds—not an anonymous distributor.
Consistency turns out to matter even more than high purity for those scaling up. One of our pharmaceutical synthesis partners described a campaign where trace non-volatile aromatics in a competitor’s product led to batch rejection and costly analytical reruns. By providing 1-Buten-3-yne refined with a dedicated final column and clean-in-place validations, we eliminated those contaminants, letting the project meet aggressive production timelines. Each lot run goes through a live review by technical staff who know the application risks, not just paperwork.
Direct production carries responsibilities beyond simply filling orders. Every molecule has a story—a documented life from precursor to shipment—and we invite regulators to witness our processes. On the plant floor, gas monitors, flame detectors, and pressure relief devices undergo monthly calibration cycles. Our field safety engineers update protocols as regulatory agencies release new guidelines or findings from incident reviews elsewhere. This spirit of engagement protects not just our people and neighbors, but the customers who rely on certainty over their next shipment.
Hazards such as flammability, acute toxicity, and peroxide formation are managed through robust stewardship practices. Knowing the science and respecting the unpredictabilities that arise means we carry out periodic reviews with external HAZOP teams, not limiting ourselves to routine procedures. Safety data and controls evolve through dialogue rather than one-way compliance—an approach that not only meets boxed checklists, but builds trust at every step of the process.
Many outside the factory gate look at chemical supply as a commodity. Our team sees it as a network of direct relationships built on candor and shared innovation. Serving those who need 1-Buten-3-yne isn’t about sending anonymous packages. Sometimes a delayed shipment means a team on the other side of the world waits for their next breakthrough or production cycle. Fast, respectful support—right down to reactor setup advice—won’t show as a line item on a bill, but it’s intrinsic to how we do business. A product’s value isn’t just in its catalog number but in how reliably and knowledgeably it reaches the people who transform it.
We believe that the best results come from acting as partners, not just suppliers. Every successful scale-up, research milestone, or product launch achieved by a customer has roots in material they could truly rely on. As direct manufacturers, the pride in delivering 1-Buten-3-yne stems from the combination of science, discipline, and integrity that supports each shipment—from our plant floor to your lab or production hall.