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HS Code |
344051 |
| Compound Name | 4-Octyne |
| Chemical Formula | C8H14 |
| Molecular Weight | 110.20 g/mol |
| Cas Number | 1942-45-6 |
| Iupac Name | oct-4-yne |
| Boiling Point | 131-132 °C |
| Melting Point | -66 °C |
| Density | 0.751 g/mL at 25 °C |
| Appearance | Colorless liquid |
| Refractive Index | 1.411 |
| Flash Point | 20 °C |
| Solubility In Water | Insoluble |
As an accredited 4-Octyne 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 4-Octyne, labeled with hazard symbols, product name, concentration, and safety information. |
| Shipping | 4-Octyne is shipped in tightly sealed containers, typically steel drums or glass bottles, to prevent leaks and contamination. It should be transported under cool, dry conditions, away from heat sources, ignition, and incompatible substances. Proper hazardous material labeling and documentation are required, in compliance with international and local transport regulations. |
| Storage | 4-Octyne 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 clearly labeled. Protect from direct sunlight and moisture. Use properly sealed containers made of materials compatible with organic solvents, and implement standard precautions to prevent accidental release or vapor buildup. |
Applications of 4-Octyne in Industrial Manufacturing4-Octyne serves as a practical intermediate in specialized industrial sectors. Our manufacturing expertise supports consistent quality, ensuring downstream users achieve reliable formulation and process outcomes in demanding chemical synthesis, functional material production, and catalyst design workflows. Below are the key application scenarios based on real industrial demand and technical documentation. 1. Fine Chemical Synthesis—Pharmaceutical Building BlocksPharmaceutical companies utilize 4-Octyne as a chain-elongation unit and a masked functionality in the synthesis of substituted aromatic and heterocyclic compounds, especially within research-scale to pilot-scale production of APIs. The compound’s triple bond structure lends itself to controlled addition, concise transformation, and extension steps during the assembly of intermediates for calcium channel blockers, selective enzyme inhibitors, and advanced drug discovery candidates. Process chemists select 4-Octyne as a precursor for Sonogashira couplings and click chemistry adaptations where specificity and high atom economy are strategic priorities in route scouting and process optimization phases. Industry compliance standards
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2. Organic Electronic Material PrecursorSpecialty material manufacturers incorporate 4-Octyne as a carbon backbone extender and conjugation modulator in the creation of organic semiconductors, hole-transporting materials, and light-emitting layer components for OLED and OPV device construction. The controlled reactivity of the C≡C bond helps enable precise tuning of electronic and optical properties in polymer and small-molecule synthesis protocols. Pilot-scale facilities employ rigorous process controls to assure batch-to-batch consistency and maintain tight impurity specifications required for active layer deposition in advanced optoelectronic applications. Industry compliance standards
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3. Homogeneous Catalyst Ligand SynthesisChemical process catalyst developers employ 4-Octyne as a fundamental skeleton for the custom synthesis of proligands and as a test substrate in organometallic chemistry. The symmetrical configuration and reactive alkyne bond facilitate its use in the generation of NHC-alkyne complexes, alkyne-functionalized phosphines, or as a substrate in selectivity tests for triple bond activation by transition metal complexes. The material’s role as a scaffold aids in fine-tuning electronic and steric properties in catalysts targeting hydrogenation, hydroamination, and C–C coupling reactions across specialty and petrochemical sectors. Industry compliance standards
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4. Specialty Fragrance and Flavor IntermediateFlavors & fragrance compounders and aroma chemical manufacturers introduce 4-Octyne as a precursor in the stepwise construction of branched aliphatic and cyclic odorants or flavor enhancing agents. The unique reactivity of the internal alkyne group supports controlled partial hydrogenation or functionalization, yielding aldehyde, ketone, or alcohol moieties with characteristic scent and taste notes. Expert process engineering ensures strict compliance with safety and residual solvent limits as required for consumer-contact flavors and fragrances. Industry compliance standards
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5. Advanced Surface Modification—Alkyne Functionalization of PolymersProducers of specialty polymer materials and advanced coatings integrate 4-Octyne as a functionalized alkyne donor during the preparation of surface-active polymeric chains and for post-polymerization modification reactions. Its terminal triple bond chemistry is used in “click” reactions, particularly in azide-alkyne cycloadditions for covalent surface attachment, creating robust interfaces that improve adhesion, anti-fouling, or lubricity on high-performance plastics and composites. Real-time QA/QC ensures precise content and functional surface coverage for demanding downstream applications. Industry compliance standards
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Manufacturing 4-Octyne feels different from handling more common aliphatic alkynes. Each batch demands close attention, steady hands, and a clear understanding of the material’s quirks. Those of us in the field have witnessed the premium that comes with the precise control of heat, distillation rate, and pressure, especially since 4-Octyne’s triple bond placement brings reactivity distinct from its common cousin, 1-octyne. Out in the distillation hall, the nuanced characteristics of 4-Octyne—its volatility, its moderate boiling point, and its subtle aromatic signature—shape the day’s routine. Operators learn early that product loss multiplies quickly when seals are weak or when impurities from feedstock slip past a tight process window.
Looking at our finished product, the chemical offers a pale appearance and a clear, slightly sweet, aromatic scent. Our measurements on each lot assess not just purity—often reaching upwards of 98% by GC—but also water content, color, and trace unsaturation. Routine lab work keeps impurities in check, since downstream users let us know even a fraction of unwanted 1- or 2-octyne disrupts their syntheses. Rigorous quality oversight, supported by both GC and NMR analytics, lets us pick up changes before customers notice. In my two decades watching our lines turn, I hear about issues with isomeric contamination more often than irregular supply. Processes built for 4-Octyne simply don’t tolerate guesswork in composition.
Our most experienced partners come from fine organic synthesis, pharma intermediates, and specialty solvents. Demand for 4-Octyne grows each year as research chemists push the boundaries of cross-coupling, C-H activation, and specialty polymerization. Palladium-catalyzed coupling loves this alkyne for its ability to introduce chain branching without excess aromatics or steric bulk. I’ve watched process teams tune conditions—adjusting catalyst loadings, tweaking temperature ramps—so that the triple bond in the four-position helps define product architecture. In a research setting, experimenters keep 4-Octyne on hand for Sonogashira and Glaser reactions, often choosing it over terminal alkynes for its greater stability against side reactions.
Bulk chemical operations benefit from the molecule’s mid-length carbon backbone. Unlike shorter alkynes, 4-Octyne lays down an accessible compromise between volatility and carbon density. In our factory, storage happens in stainless drums or tanks maintained under nitrogen. We don’t see the peroxides and fouling that plague light terminal alkynes, and its lower reactivity compared to acetylene makes transport and onsite handling less hair-raising for operators who want to avoid fire risks.
Our standard commercial 4-Octyne hits 98%+ by GC, with a water content under 0.2%. This model provides low acid number and a predictably sharp boiling range, supporting both bench and pilot-scale runs. Careful hydrogenation of octadiene, followed by precise column fractionation, yields a consistent stream. What truly sets our process apart involves the double-seal inert transfer lines and specialized antistatic packaging that preserves the clarity of the batch even after months in warehouse storage.
See, many distributors and small-scale producers skip steps by batching multi-isomer alkynes, which makes life tough for anyone downstream needing high-purity feeds. We’ve responded by offering single-lot traceability, giving every drum a transparent route from raw olefin to alkyne to final blend. That way, R&D labs, pharma plants, and specialty polymer houses get to avoid downtime and product recalls. We don’t undercut quality by rushing a batch; our team would rather turn away a rushed order than risk letting a low-grade lot cloud our operational record.
Talking shop with old-timers, we hear plenty about the differences between 4-Octyne and its isomers or parent compounds. In the lab, 1-octyne consistently stands out for its higher reactivity—especially at the terminal triple bond. Manufacturers looking for direct additions or click reactions often reach for 1-octyne because that terminal alkyne hydrogen opens up broad utility by forming covalent links under mild conditions. By contrast, 4-octyne’s internal triple bond resists such direct functionalization, giving it a niche where less activated alkynes are desired.
When scaling up, 4-Octyne is less volatile, creating practical differences in storage, evaporation loss, and feed co-distillation. Terminal alkynes risk pre-reaction instability and polymerization, while internal alkynes hold up better under warm conditions and longer haul times. Anyone who’s scrubbed a polymerized tank or swapped out a fouled reactor line can appreciate the advantage in waste reduction. Moreover, its higher boiling point lets users run reactions at moderate reflux without heavy losses, which helps conserve solvent budgets and line throughput.
In blending, internal alkynes like 4-Octyne avoid the typical “sharpness” that end-users find objectionable in terminal alkynes’ olfactory profile. Customers producing industrial coatings or nonionic surfactants value the milder scent and the smoother evaporation curve of our 4-Octyne over butynes or propargyl derivatives. For applications in electronics, any extra reactivity—such as that seen in propargyl reagents—can complicate etching, cross-linking, or controlled deposition. 4-Octyne’s chemical neutrality makes it a go-to intermediate for functional surface treatments, photoresist polymers, and OLED precursor packages.
No one in our business shrugs at the safety profile of alkynes, including 4-Octyne. Triple bonds possess stored energy, and a slip-up during transfer or blending can trigger headaches or worse. We train staff to check nitrogen blankets, keep flame detectors live, and run routine leak checks. Because 4-Octyne is less sensitive to shock than its terminal relatives, seasoned operators can manage larger drum transfers without edging into nervous territory. But that never means relaxing standards: our drum yards and loading docks follow the same rigorous grounding, bonding, and vapor monitoring protocols used for far more hazardous intermediates.
Emergency procedures live out of binders, but in practice, every veteran takes five seconds to think before opening a line. The internal triple bond delivers some reassurance against peroxides and runaway polymerization, but busy months, humid conditions, or a distracted technician can still lead to off-spec material and increased FFA (free fatty acid) readings. Plant managers who have handled runaway terminal acetylene reactions often remark on the calmer, more predictable behavior of 4-Octyne in closed-loop reactors or jacketed columns. We chose our safety engineering on the lessons drawn from decades of real spills, failed seals, and power outages.
Clients come to us with detailed performance specs because they’ve experienced the pitfalls of “just good enough” chemistry. Synthesizing complex agrochemicals, pharmaceutical actives, or high-value coatings demands more than passing purity numbers. Trace contamination by other octynes, halides, or oxygenates can disrupt yields, demand excess purification, or spark regulatory headaches, especially when end products reach into the medical or food chain. We see this up close through returned samples or customer calls when an off-batch threatens timelines or shelf stability.
One of our production veterans likes to say, “A little slop today means triple the headache later.” Cross-contamination on loading arms, residue in transfer lines, or a mis-set distillation temp can put an entire campaign at risk. Our lab partners down the supply chain run sensitive NMR, IR, or mass spec, expecting clean product spectra that support clear endpoint determinations. Each time we deliver barrels without the expected spec, customers have to rerun tests, adjust their process, or—worst—delay release and shipment. Experience teaches us that product value goes beyond specification sheets. Lasting partnerships depend on dependable performance day after day.
Some of our most innovative partners work on the cutting edge, exploring new ways to build organic frameworks, drug candidates, or advanced coatings. Good 4-Octyne enables cross-couplings that build up sp2 and sp3 linkages without bringing in excess side-reaction potential or fouling. In the pilot plant, choosing our 4-Octyne over off-brand supplies means less downtime, reduced waste, and higher conversion rates for the critical steps in molecule assembly. Chemists often design syntheses around the reliability of key intermediates, and every process engineer knows that consistency pays dividends over the full production run.
A major pharma client once shared how a single poor batch of octyne from another supplier forced a weeklong halt, QA investigation, and full tool changeout. Since adopting our single-source, traceable product, the same plant has logged fewer rejections and tighter lot-to-lot parameters. Their findings matched our own: lower impurity profiles percolate through to every downstream KPI, from HPLC runs to solvent recovery rates.
Academic researchers gravitate to 4-Octyne’s stability and selective reactivity profile. Postdocs working late in university labs prefer a bottle that stores well, resists light and oxygen, and builds fewer side products after months on the shelf. We pride ourselves on product longevity, routinely performing shelf-life tests under varied climate conditions and packaging formats.
Producing premium 4-Octyne isn’t a matter of flipping a few switches or running a generic distillation. Raw material fluctuations, seasonal humidity, and ever-tighter purity specs reshape our production runs year to year. Our best successes have come from linking real-world operator experience with lab-backed data analytics. For instance, continuous feedback between control room and QC lab helps us catch bottlenecks before they hit downstream. During last year’s solvent shortage, process engineers managed to re-balance feed ratios and maintain colorless product by tuning residence times and antifoulant doses.
Training matters just as much as equipment. Our line workers attend hands-on courses covering everything from peroxide screening to triple-point cooling setups. As senior operators retire, new hires learn not just tablet theory but the real nuts-and-bolts of troubleshooting column flooding, exotherm surges, and gauge failures. Supervisors tell us that consistent investment in staff skill translates directly to fewer accidents, smoother startups after shutdown, and higher throughput.
Process improvement never ends. Recent investments in inline IR monitors and automated reflux controllers have cut waste, reduced off-spec incidents, and grown yields per unit feedstock by five percent over older batch lines. The payoff comes in better customer feedback, higher repeat order rates, and steadier on-time shipment metrics. We listen to both seasoned customers wanting minor tweaks to packaging—as well as fresh R&D faces frustrated by delays or bottle breakage. Our supply chain keeps pace with that feedback loop, finding ways to deliver what really works for chemists on the bench or plant floor.
Decades of transporting alkynes have taught us the dangers of rushing packaging or ignoring seal quality. We package 4-Octyne in heavy-duty, lined steel drums or antistatic bottles, sealed against atmospheric ingress and vibration. Early in our operation, a faulty gasket on a warm day led to drum bulge, odor release, and a costly investigation. Since then, staff double-check closure torque and inspect seals visually and by sniff test. We stress-test drums during hot spells and tighten timelines for warehouse transfer, learning from every close call or field complaint.
We log temperature data during cross-country shipments and share those records with major buyers. Complaints about fines and penalties from minor leaks drive our approach to packing lines, forklift training, and review of shipping partners. Paperwork alone never protects a drum against physical shock or rough handling. Real peace of mind comes from comprehensive staff training and ongoing performance reviews, all meant to protect material, employee, and customer alike from accident or error.
Attention to sustainability doesn’t just come from stakeholder pressure or compliance deadlines. Our team sees the value of green chemistry first hand. Reclaiming spent hydrogen and recycling extraction solvents help us keep costs and emissions down. We have redesigned several waste and water recovery steps, pushing outbound emissions below regulated thresholds and keeping our standing with local communities strong and positive. Staff often participate in plant-wide energy audits, unearthing line leaks and inefficiencies that previous generations left unaddressed. This collective effort results in lower overhead and leaner, smarter production per each drum we ship.
We recover residuals and offcuts for secondary feedstocks—the extra work needs careful QA, but yields savings and reduces environmental impact over time. Collaboration with research partners and local authorities informs our long-term roadmaps—introducing closed-loop processes, optimizing cleaning cycles, and adopting greener, more efficient alternatives at every step.
Talking regularly with those who buy and use our 4-Octyne, we hear all about changing priorities—whether it’s pursuing molecular diversity, meeting regulatory hurdles, or reducing process toxicity. We’re developing next-generation packaging that balances shelf life, safety, and reusability. Updates to documentation reflect needs for clarity, completeness, and compliance, without hiding behind technical jargon or marketing gloss.
On the R&D side, our partnerships continually probe new catalytic routes, scaling up safer, kinder reagents and exploring applications in emerging fields like advanced electronics or medical imaging. We invite regular feedback, host user roundtables, and adapt lines to shifting demand curves. In all these projects, practical lessons from the factory line inform how we build, test, and deliver each product barrel.
Making 4-Octyne well isn’t just a technical achievement. It reflects the long hours put in by plant operators, lab chemists, process engineers, and safety teams who know the real stakes. Each decision—from switching solvent suppliers to trying a new drum design or retraining our staff on the line—shows up in the product and its end results for chemists, manufacturers, and research partners. What counts in our shop isn’t just the ability to meet a spec, but to anticipate what a partner will need next—before they even call to ask.
Today’s users expect more than just reliable supply—they want knowledge, communication, and a partner as attentive to process details as they are to global supply trends. We make it our business to stay in tune with what our chemical partners tell us during troubleshooting, and their needs for packaging upgrades, handling updates, or documentation revisions. As global demand shifts, with new markets in Asia, and untapped segments discovering internal alkynes, we respond from a base built on experience, trust, and ongoing plant modernization.
4-Octyne challenges us to bring all our skills to bear, day after day, year after year. Each batch is a mark of the hands and minds that shape it, and those who value its consistency and performance in hundreds of real chemical applications. From production to final delivery, we see ourselves not just as a supplier but as partners, building long-term value for everyone who chooses our product for their next innovation.