© 2026 Sinochem Nanjing Corporation,
All Right Reserved
Curiosity about small molecules with big chemical personalities set the stage for exploring compounds like 1-Butyne. Chemists in the late nineteenth and early twentieth centuries began building new kinds of hydrocarbons in the lab, not just to satisfy curiosity, but to fuel the next stages of industry. 1-Butyne, a straight-chain alkyne, first stepped into the limelight in the era of coal tar chemistry and early petroleum cracking. The need for new synthetic building blocks brought 1-Butyne into focus. Today, research archives reflect decades of experimentation, first in glassware and now in sophisticated reactors—evidence of relentless pursuit for improved synthesis and broader utility.
Mention 1-Butyne in a laboratory, and most chemists picture a colorless gas with a sharp, ether-like aroma. It’s known in its stabilized form, a nod to the reactive triple bond that favors rapid polymerization or even explosive decomposition without a stabilizing agent on deck. In industry, 1-Butyne plays a background role, but it can unlock new reactions, chain extensions, and functional group conversions—a keystone for synthetic chemists and researchers.
1-Butyne’s molecular formula—C4H6—hints at its personality. Light, volatile, and eager to evaporate, it performs best stored in pressure-rated vessels under an inert atmosphere. Its boiling point lands near 8 °C, so open a cylinder outside in mild weather and the compound jets away as gas. The triple bond at the one position marks it as a terminal alkyne, the sort that lights up reactions but demands careful handling. That triple bond also means it holds unsaturation, making it a prime target for addition reactions and the like.
Handling 1-Butyne means knowing what you are dealing with, right down to purity and stabilizer content. Commercial cylinders carry labels not just for identification but as integral safety reminders—flammability warnings, pressure ratings, and the presence of stabilizers like acetone or proprietary mixtures. Labs with a safety mindset never take shortcuts with it; detecting even a pinhole leak means immediate attention. Quality specs typically call for high purity, minimizing side-chain isomers or oxygenates that could sidetrack experiments or manufacturing runs.
Throughout the years, synthetic methods have changed, but most involve classic routes like dehydrohalogenation of 1,2-dibromobutanes or similar alkyl dihalides. A strong base strips hydrogen halides, closing the gap to yield the triple bond. Other approaches include passing saturated hydrocarbons through high-temperature catalytic beds, with yields often improved through advances in catalyst formulation. In modern settings, these routes benefit from continual oversight—automation, routine gas chromatography, and the peace of mind born of robust process safety.
Chemists looking for reactivity often land on 1-Butyne for its convenient terminal alkyne. It’s a champion in reactions like coupling (think Sonogashira, Glaser, or Cadiot-Chodkiewicz), hydrohalogenation, and chain extension through nucleophilic addition. The molecule’s triply bonded carbon-carbon stretch opens up the board to create secondary functionalized products or serve as a convenient handle for cross-linking or introduction of new groups. Catalyst design has pushed the envelope for higher selectivity, making cleaner pathways available for specialty intermediates.
Industry and science toss around several names: Ethylacetylene, But-1-yne, and even monikers that hint at utility like "stabilized butyne gas." Each name reflects a slightly different background—historical context, chemical nomenclature, or industrial branding. Regardless of the label, the substance inside the cylinder tells the real story.
Flammability tops the list of hazards, and any lab or facility using 1-Butyne takes precautions that echo across every team meeting and operating manual—spark-free tools, well-maintained gas detection, and readiness to vent releases with proper controls. Regulatory standards—rooted in lessons learned from past accidents—insist on thorough training for everything from manifold operation to cylinder transport. The reactivity of the molecule means it only belongs under trained hands, not left on benchtops or near ignition sources. Even outside the lab, during shipping and storage, strict controls ensure stabilized product reaches users without incident. Regulatory agencies require comprehensive documentation to support traceability and emergency measures.
In practical terms, 1-Butyne rarely grabs headlines outside specialized chemistry circles, but its fingerprints run deep. Pharmaceuticals, custom materials, and specialty polymers sometimes begin with this alkyne as a core substrate. Research settings find it indispensable for exploratory organic synthesis, combinatorial libraries, and advanced cross-coupling to build complexity from simple feedstocks. Additive manufacturing and advanced coatings sometimes draw on its reactivity to create fine-tuned architectures.
Research into 1-Butyne’s chemistry never really sits still. Academic labs keep turning over new reactions—sometimes aiming for greener routes with fewer byproducts, sometimes unlocking completely new chemistry like tandem catalysis or photoredox processes. Industrial R&D teams scrutinize reaction kinetics and purity, always hungry for methods that cut down on cost and up safety yields. Competitive pressure from alternative alkynes or other unsaturated hydrocarbons drives new approaches to activation and functionalization, alongside efforts to recycle spent catalysts and minimize waste.
Data from animal studies and exposure models shape current understanding of 1-Butyne’s risks. As with most small hydrocarbons, inhalation at high concentrations can bring on headaches, dizziness, or more severe neurological problems. The stabilized form adds additional complexity, since stabilizers can alter toxicokinetics. Long-term effects remain under discussion, but regulatory summaries stress minimizing occupational exposure, updating ventilation strategies, and equipping personnel with both real-time monitoring and training in the latest procedural controls.
Chemistry is full of surprises, and 1-Butyne could see a larger stage in decades ahead. Trends toward precision manufacturing and tailored synthesis put a premium on terminal alkynes as raw materials. Green chemistry initiatives push for cleaner production routes and safer stabilizers, while computational chemistry teases out new reactivity patterns. Engineered enzymes or bio-mimetic catalysts could one day sidestep traditional synthesis for selective, mild transformations. As the push for sustainable chemistry expands, the focus lands on maximizing value from traditional hydrocarbons through smarter, lower-impact reactions—keeping safety and efficiency side by side. Exploration is far from over, with curiosity and demand setting the pace for 1-Butyne’s next chapter.
Most people never think twice about the compounds running through the veins of their daily life. Sitting in traffic, opening cleaning supplies, or even lighting a barbecue, chemicals quietly shape our routines. In the world of chemistry, details matter—especially if you happen to work in a lab, teach a science class, or simply find yourself curious after reading a safety data sheet. Take 1-Butyne, for example, with its formula C4H6. Understanding the makeup of such molecules doesn't just scratch a trivia itch; it keeps people safe and powers real-world discovery.
Every formula tells a story. C4H6 doesn’t just spell out the elements in 1-Butyne; those numbers and letters hint at reactivity, uses, and reasons for stabilization. With four carbons and six hydrogens, 1-Butyne lands in a group known as alkynes—meaning a triple bond holds two carbons together. This triple bond is a key reason behind both its usefulness and the need for stabilization. In my own experience as a chemistry student, a quick glance at that formula signaled, “best avoid an open flame.”
In industry, 1-Butyne appears in organic syntheses, helping to build more complex molecules—sometimes ones that end up in pharmaceuticals or specialty materials. Comparing it to close cousins in the butyne family, that lone triple bond position (at the #1 carbon) impacts how it reacts with other chemicals. Anyone preparing experiments or working with supplies must double-check the formula, since confusing 1-Butyne with another butyne isomers could waste resources or even spark dangerous reactions. So, the formula makes or breaks safety routines, budget planning, and experimental accuracy.
1-Butyne comes labeled as “stabilized” because it loves to react—sometimes too much. Without an added inhibitor, the compound can polymerize, creating sticky masses or causing pressure build-ups. In university stockrooms, I used to see “stabilized” as a clear indicator that a bottle contained an additive, often a small amount of a compound like copper. These stabilizers slow down unwanted reactions. Skipping out on stabilization measures, even for an ‘innocent’ hydrocarbon, can bring big trouble. People have learned this lesson the hard way through lab accidents and near-misses that led to blown out storage vaults or weeks of cleanup.
Reporting standards now require any handler or supplier to list stabilization information right alongside the chemical formula on material safety sheets. OSHA and similar safety authorities see this as non-negotiable. If someone orders 1-Butyne, they won’t just see C4H6; they’ll see notations about how the liquid has been treated to make transport and storage less of a hazard.
The small details, such as the chemical formula for 1-Butyne, stack up fast in a world full of split-second decisions. Whether prepping a lesson plan, running a pilot project, or double-checking chemical stocks, a formula like C4H6 stays useful beyond the realm of theory. A culture that values accuracy—recording stabilization steps, labeling bottles with full details, and encouraging questions—helps prevent incidents and builds trust. Even something this basic has far-reaching impact in industries and classrooms alike.
Anyone who has walked through a chemical plant or cracked open an organic chemistry textbook has brushed up against alkynes. These molecules pack an extra punch because of their triple bond, making them more reactive than a lot of other hydrocarbons. 1-Butyne [Stabilized] doesn’t get as much attention as its cousins like acetylene or ethyne, but behind the scenes, it’s doing a lot more heavy lifting than most folks realize.
I watched chemists in a mid-sized research lab look for faster, cleaner ways to build specialty chemicals, and 1-Butyne came up time and again for a reason. That triple bond helps it serve as a starting block for a range of organic molecules, especially in the world of pharmaceuticals and fragrance creation. It’s hard to create some of the more complex building blocks like certain alkenes and alcohols without a tight, controllable reaction partner. 1-Butyne steps in here, especially in coupling reactions.
In fact, I once spoke with a chemist who spent weeks tweaking yield on a key intermediate for an anti-inflammatory drug. Swapping in 1-Butyne cut their steps in half. This isn’t just theory—it’s saved time and money for teams all around the world.
Walk through a modern materials lab, and chances are you’ll spot 1-Butyne at work as a monomer. Its ability to join up with other molecules lets it build specialty polymers. These materials often end up in coatings, adhesives, and even electronic components. To get the properties manufacturers want—flexibility, conductivity, or resistance to certain chemicals—scientists need tools as precise as 1-Butyne; it offers functional handles that can be further modified.
In my own visits to industrial labs, I saw engineers push performance boundaries for electronics by using structure-property relationships partly set by what’s used in the early stages, like 1-Butyne. These new materials can become part of flexible screens, batteries, or protective finishes on wires.
Not every compound gets to claim a spot on the standard shelf in a university lab, but stabilized 1-Butyne is a regular. Teachers trust it for demonstrations of classic organic reactions, particularly Sonogashira couplings and similar transformations. Students get valuable hands-on practice learning how triple-bonded hydrocarbons unlock synthetic pathways.
Beyond just teaching, its potential keeps research labs coming back. Scientists trying to invent catalysts, probe new reaction routes, or explore green chemistry principles turn to 1-Butyne for repeatable, dependable experiments. Its performance is steady, which matters for reproducibility.
Since 1-Butyne can flash up if handled carelessly, stabilizing it matters for anyone working at scale. Labs and factories have to take safety seriously: good ventilation, leak detection, and proper storage stand between routine experiments and disaster. Speaking from experience, ignoring these basics is never worth the risk. Accidents are rare when everyone respects the protocols.
Sustainability is starting to shape how companies look at every chemical they bring in. Some newer production methods for 1-Butyne focus on lower-waste processes or renewable feedstocks. Green chemistry advocates want more of this shift.
Every time I speak to a synthetic chemist, they seem to dream up something new for 1-Butyne. It could be the next fuel additive, a custom fragrance, or a breakthrough material for clean energy tech. Practical chemistry builds on simple building blocks, and 1-Butyne’s staying power proves it holds real value in both the lab and the factory.
Chemistry veterans remember their first interaction with volatile gases. 1-Butyne fits in that same category: it's colorless, flammable, and reactive. Think of acetylene—a cousin you wouldn’t want unattended next to a heat source. In the hands of skilled operators, 1-Butyne serves as a building block for synthesis and specialty chemical work. Let care slip, and minor mistakes invite serious trouble. Real-world incidents remind us—gas cylinders can rupture or leak if handled carelessly.
Flammability tops the list with 1-Butyne. Even slight leaks drift through the air and dart toward anything with a spark. In one case I recall, a graduate student stored a similar alkyne in a poorly ventilated cabinet. Nobody got hurt, but investigators later found gas had built up, brushing the edge of disaster. 1-Butyne doesn't just burn easily—its vapors can mix with air to create a hidden ignition risk.
Then there's the pressurized cylinder itself. Physical damage, heat exposure, or rough handling could turn that tank into an unpredictable missile. Breathing in vapors isn’t wise, either. At minimum, you’re looking at dizziness and headaches. Prolonged exposure could mean lasting health fallout, especially for workers caught off guard.
Choose a dry, cool space with free air flow. Good storage means never leaving a pressurized cylinder near sunlight or heat. I’ve walked into labs with gas cylinders shoved into hot corners—every one of those setups risked leaks or cylinder rupture. Secure each tank upright with chains or sturdy straps to keep them steady from accidental tipping.
The law and common sense agree—store away from ignition sources, oxidizers, and acids. Electricity panels, open flames, even frayed cords spell danger. Slap a clear label on each cylinder. That label warns both trained professionals and new staff of what they’re dealing with, and cuts down on confusion in a busy storeroom or lab.
Prep means everything. Before connecting a regulator, inspect for dirt, oil, or damaged threads. Oil near 1-Butyne can set off decomposition—never use greasy hands or tools. Ventilate the work area. I remember a workshop where air sat stagnant and alarms failed; even a small release sent vapors into every corner. Good ventilation would have cleared that risk.
Wear safety goggles and flame-resistant lab coats. Make sure gloves are rated for chemical handling. In emergency drills, teams rehearse how to shut valves fast and evacuate—too often, those skills come in handy. Avoid dragging, rolling, or dropping tanks. Use a cart, secure the cylinder, and plan each move before touching anything.
Everyone handling 1-Butyne needs solid, documented training. Supervisors can’t assume people learned safety in school—skills fade or never get taught. I once audited a facility where workers skipped leak checks and relied on luck. Smart shops keep up-to-date procedures and encourage staff to spot and report hazards fast.
Accidents tell a story about attitude, not just equipment. A workplace that values open communication, maintenance, and respect for risk sees fewer injuries. Good safety habits stem from real supervision and honest feedback. Let’s hold ourselves to the same standards we’d expect if our own families worked nearby.
1-Butyne, being a highly flammable gas, draws a lot of attention when handled in the lab or at an industrial site. Once you’ve worked around such chemicals, you learn quickly that the real dangers come not just from the substance itself but also from shortcuts or lapses in attention. Fire stands at the top of the list of risks — 1-Butyne can ignite even from a small spark or hot surface. Gas leaks don’t just threaten burns; the buildup of vapor can cause explosions if there’s an ignition source nearby.
Breathing in 1-Butyne doesn’t just give you a cough or a headache. In a room without enough ventilation, the gas can push oxygen out of the air. An oxygen-poor space can bring on dizziness, headaches, or worse, unconsciousness. Years ago, a technician told me about getting lightheaded during a transfer, thinking he could push through. He ended up needing help outside, reminding all of us that paying close attention to ventilation never counts as overkill, especially for gases like this.
There’s another layer — skin and eye contact. Liquid 1-Butyne will freeze on contact, leaving frostbite behind. Even the stabilized forms don’t spare you from the cold burn, and splashes can easily reach the eyes or hands if you skip protective gear. Handling the cylinders or transferring this material without gloves or goggles leads to injuries that take weeks, not days, to heal.
Dealing with 1-Butyne means not trusting good luck to cover safety gaps. The gas needs sturdy, airtight cylinders, with valves designed for corrosive or flammable gases. Every place I’ve seen that handles this material well sets up transfer stations in forced-ventilation hoods. Blowout panels, spark-proof tools, and flame arrestors all stack the odds in your favor.
Personal protection comes next. Nitrile gloves, splash goggles, full suits if there’s any risk of liquid exposure — they all make a difference. At my old plant, nobody entered the gas storage area without a personal gas monitor clipped to their belt. Often, it’s the low-tech, everyday habits that stop things from going bad — simple things like always double-checking valve positions and pressure gauges.
Fire-fighting plans matter. Everybody on site should know the location of dry chemical extinguishers and emergency shut-off valves. You don’t fight a 1-Butyne fire with water. A fast response by trained folks limits injuries or bigger disasters. Fire crews and plant workers practice for these situations, and I’ve seen drills turn up small mistakes that could spell trouble if a real leak happened.
A buddy system works well when handling cylinders or moving them to storage. If someone does get sprayed or exposed, quick showers and eye washes become urgent, not optional. The safest labs and plants all agree on sweeps after work and precise inventory controls. These routines catch slow leaks or mislabeling before anyone gets hurt.
Waste doesn’t go in the regular bin. Qualified disposal companies pick up spent cylinders or any contaminated material, avoiding the risk of leftover 1-Butyne starting trouble in trash heaps or recycling yards. Documenting every transfer, leak, or incident — it all makes audits and reviews clearer, feeding into better training and smarter safety policies.
People trust experience and clear communication more than warning labels. The best lessons on 1-Butyne safety come from near-misses, stories passed down, and constant reminders from supervisors who’ve seen the consequences of carelessness. Every step toward safer handling comes back to open discussions, honest reporting of problems, and never ignoring basic checks. That’s the kind of culture where everyone looks out for each other, not just themselves.
Anyone who’s handled specialty chemicals knows purity isn’t just a number printed on a bottle. Even minor contamination can ruin whole batches, send months of lab work down the drain, or even spark off safety hazards that put people in danger. 1-Butyne [Stabilized] is no exception. Different grades mean the difference between reliable outcomes and guesswork every time you take a sample.
No one wants to pay laboratory prices if the work doesn’t call for ultra-clean material. Synthesis chemists chasing an elusive target—a step in a tricky total synthesis, perhaps—often live or die by impurities. At the same time, folks working with gas mixtures for calibration, or those who use butyne for routine organic building blocks, look for something less expensive while knowing what trace materials might come along for the ride.
Back in grad school, I tried to use generic 1-butyne in a reaction meant for a research paper. The run failed, and I spent days chasing ghosts in my procedure, only to find a heavier sulfur impurity—left over from the manufacturing process—spoiled the outcome. Lesson learned: low-grade feedstock can short-circuit the chance to publish, and sometimes, things don’t just get messy—they get dangerous. Chemicals at high purity often come with safety data and full certificates of analysis that trace the material lot by lot. Contaminants alter physical properties, spark side reactions, or block important analytical signals. That’s not just annoying. It risks health, especially if stabilizers break down and release reactive fragments over time.
Many buyers put their trust in technical data sheets. Serious players verify through independent testing, especially in regulated work or where pharmaceutical or electronics standards must be met. Walk into any quality-driven facility, and there’s always a process to qualify chemical lots, especially if the plan involves human trials or sensitive microelectronics. Ask for “analytical,” “high-purity,” or “technical” grade and the answer depends on market routes and the chemical’s intended use. Some countries, such as those governed by REACH in Europe or FDA guidance in the United States, require extra traceability and top-tier reporting. These rules aren't mere red tape—patients, consumers, and workers benefit when those standards are followed.
Suppliers sometimes shift or discontinue grades without notice, especially if there isn’t enough call for a certain concentration or if the stabilizer changes. It’s become more common for supply contracts to list what impurities are allowed and at what amount, thanks to risk assessments demanded by downstream users. Nobody wants to order a batch and find the stabilizer isn’t compatible with their planned chemistry. Forward-thinking suppliers keep in close touch with both end-users and upstream producers, acting quickly if there’s a switch in grade, purity, stabilizer, or packaging.
Clear communication between buyers and suppliers drives better outcomes. It pays to ask detailed questions about purity testing, stabilizer use, and the presence of specific contaminants that might cause issues. Reliable vendors provide batch-level data, not just general purity claims. Smaller labs sometimes pool resources for larger orders that guarantee a tighter spec. Companies with unique requirements have leveraged custom synthesis or purification services, even if it adds some cost and lead time.
| Names | |
| Preferred IUPAC name | but-1-yne |
| Other names |
But-1-yne Ethylacetylene |
| Pronunciation | /ˈwʌn.bjuː.taɪn/ |
| Identifiers | |
| CAS Number | 107-00-6 |
| Beilstein Reference | 1718737 |
| ChEBI | CHEBI:37140 |
| ChEMBL | CHEMBL165027 |
| ChemSpider | 69493 |
| DrugBank | DB03725 |
| ECHA InfoCard | 07b982f9-0d1b-430f-9bf0-9e9b516e48c6 |
| EC Number | 203-449-2 |
| Gmelin Reference | 8786 |
| KEGG | C01677 |
| MeSH | D001939 |
| PubChem CID | 7836 |
| RTECS number | EL2975000 |
| UNII | 36B82AMQ9N |
| UN number | UN2452 |
| CompTox Dashboard (EPA) | DTXSID5041535 |
| Properties | |
| Chemical formula | C4H6 |
| Molar mass | 54.09 g/mol |
| Appearance | Colorless compressed liquefied gas |
| Odor | Sweet acetylene-like |
| Density | 0.696 g/mL at 25 °C (lit.) |
| Solubility in water | Insoluble |
| log P | 1.03 |
| Vapor pressure | 80 mmHg (20 °C) |
| Acidity (pKa) | 25.16 |
| Basicity (pKb) | pKb = 23.3 |
| Magnetic susceptibility (χ) | -20×10⁻⁶ cm³/mol |
| Refractive index (nD) | nD 1.370 |
| Viscosity | 0.324 cP (25°C) |
| Dipole moment | 0.66 D |
| Thermochemistry | |
| Std molar entropy (S⦵298) | 267.5 J·mol⁻¹·K⁻¹ |
| Std enthalpy of formation (ΔfH⦵298) | 154.7 kJ/mol |
| Std enthalpy of combustion (ΔcH⦵298) | -2629.7 kJ/mol |
| Pharmacology | |
| ATC code | V03AB24 |
| Hazards | |
| GHS labelling | GHS02, GHS07 |
| Pictograms | GHS02,GHS07 |
| Signal word | Danger |
| Precautionary statements | P210, P261, P280, P377, P381, P410+P403 |
| NFPA 704 (fire diamond) | 2-4-2-2 |
| Flash point | Flash point: -22 °C |
| Autoignition temperature | 365 °C (689 °F) |
| Explosive limits | Explosive limits: 1.6% to 10.4% |
| Lethal dose or concentration | Lethal dose or concentration of 1-Butyne [Stabilized]: "LC50 (inhalation, rat): 276,000 ppm (4 hours) |
| LD50 (median dose) | LD50 (median dose): >2000 mg/kg (oral, rat) |
| NIOSH | NIOSH: *EW3800000* |
| PEL (Permissible) | PEL: 800 ppm |
| REL (Recommended) | 6 mg/m³ |
| IDLH (Immediate danger) | 1800 ppm |
| Related compounds | |
| Related compounds |
1-Butene 2-Butyne 2-Butanol Butadiene |
