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HS Code |
367701 |
| Cas Number | 6074-84-6 |
| Molecular Formula | C11H18 |
| Molecular Weight | 150.26 |
| Iupac Name | undeca-1,3,5-triene |
| Boiling Point | 193-194 °C |
| Appearance | Colorless liquid |
| Density | 0.784 g/mL at 25 °C |
| Refractive Index | 1.445-1.448 |
| Flash Point | 52 °C (closed cup) |
| Solubility In Water | Insoluble |
As an accredited 1,3,5-Undecatriene factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | The 1,3,5-Undecatriene is supplied in a 25 mL amber glass bottle, securely sealed with a screw cap for safe handling. |
| Shipping | 1,3,5-Undecatriene should be shipped in tightly sealed containers under an inert atmosphere, such as nitrogen, away from heat and sources of ignition. It must comply with hazardous material regulations, labeled properly, and packaged to prevent leaks. Appropriate documentation and handling instructions must accompany the shipment to ensure safety and regulatory compliance. |
| Storage | 1,3,5-Undecatriene should be stored in a cool, dry, well-ventilated area away from sources of ignition and incompatible substances such as strong oxidizers. Keep the container tightly closed and protected from light. Use containers made of materials compatible with unsaturated hydrocarbons. Ensure proper labeling and keep away from heat, sparks, and open flames. Store in accordance with local regulations. |
Applications of 1,3,5-Undecatriene in Industrial Manufacturing1,3,5-Undecatriene serves as a specialty chemical intermediate across several advanced industrial sectors. As the original manufacturer, we supply this compound to OEMs and integrators who require high-purity linear trienes for downstream synthesis, polymer modification, and specialty fragrance formulations. Below we outline primary applications with specific process, compliance, usage, and final product details. 1. Polyolefin Copolymer SynthesisThis triene acts as a comonomer in polyolefin manufacture, particularly for functionalizing polyethylene or polypropylene through solution or gas-phase copolymerization. The introduction of multiple double bonds modifies polymer flexibility and compatibility, supporting high-performance film and molded goods. Strict control of purity and feed ratio during continuous polymerization lines is necessary to maintain product properties and downstream processability. Industry compliance standards
Typical usage ratio
Downstream process integration
Final product types
2. Fragrance Intermediate for Macrocyclic Musks1,3,5-Undecatriene functions as a key building block in the synthesis of macrocyclic musks and other high-value aroma chemicals. Its extended triene structure is required in multi-step transformation including ring-closing metathesis and oxidation steps. Consistent lot quality and trace impurity control are critical to avoid off-notes in the final fragrance molecule. Bulk batches undergo rigorous quality assurance aligned with IFRA fragrance regulations and manufacturing standards for cosmetics and detergents. Industry compliance standards
Typical usage ratio
Downstream process integration
Final product types
3. Crosslinking Agent in Silicone Elastomer ManufacturingThis triene provides multi-reactive sites for hydrosilylation and addition-cure reactions in advanced silicone elastomer and RTV (Room-Temperature Vulcanizing) silicone systems. It introduces pendant unsaturation, improving flexibility and network density of cured silicones. Production requires in-line quality monitoring to ensure conversion control and residual triene minimization, aligned with end-use safety profiles for automotive, electronics, and medical grades. Industry compliance standards
Typical usage ratio
Downstream process integration
Final product types
4. Precursor for Polyamide and Polyimine Specialty MonomersDownstream producers use this linear triene to access specialty diamine and dicarboxylic acid intermediates via hydroformylation, followed by amination or oxidation steps. The resulting monomers enhance heat resistance, impact tolerance, and flexibility in advanced engineering plastics. Careful control of impurity profiles and functional group distribution is necessary to meet the technical requirements of polyamide synthesis in electrical and consumer electronic applications. Industry compliance standards
Typical usage ratio
Downstream process integration
Final product types
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Many in the industry might recognize 1,3,5-Undecatriene by its molecular formula C11H18 and its unique trifecta of isolated double bonds within an 11-carbon skeleton. In our factory, the presence of this compound always triggers careful monitoring of the process flow. You don’t land pure trienic hydrocarbons by accident. Production consistency, batch after batch, means close collaboration between teams on the plant floor, process engineers, and quality controllers. Our operators have seen small temperature drifts in the distillation column spell the difference between a clean triene cut and a frustrating off-spec. That’s the reality sitting at the intersection of chemistry and equipment.
From years of manufacturing experience, it’s clear that 1,3,5-Undecatriene doesn’t just fill a shelf in the storage area — it shapes choices across synthesis labs and commercial applications. For us, purity is personal. Our typical product assays above 98%, confirmed by gas chromatography in our own QA lab. You’d be surprised how even a minor impurity can knock an entire downstream process off track. We tune our separation processes with nothing but end use in mind, recognizing that a fragrance formulator or a materials chemist down the line will build off our foundation.
Our 1,3,5-Undecatriene rolls out in two primary models: bulk liquid in stabilized drums and high-purity, micro-aliquots sealed for research applications. Each model addresses different demands, but the backbone remains the same: a chain of 11 carbons punctuated by double bonds at the 1, 3, and 5 positions. This unsaturation pattern delivers both reactivity for synthetic chemists and a volatile profile for flavor and fragrance specialists managing delicate blends.
Since inception, our approach hasn't settled for generic standards. Isolation and preservation of the triene structure require a plant design built around rigorous inert gas blanketing and temperature control. Even a short exposure to oxygen or stray heat can prompt undesired polymerization. We fit our reactors and transfer lines with specialty seals, monitor oxygen ingress during every transfer, and select packing materials tested to withstand subtle but cumulative attacks from reactive hydrocarbons. The result: batches that deliver the expected properties reliably.
Customers in the field, particularly those working with process intensification or green chemistry goals, have shared that a triene’s shelf life becomes critical at scale. Stability data from our stores show less than 2% degradation over six months at recommended storage, a figure we've documented through routine physical and chemical analysis. This durability means less waste, smoother logistics, and better material stewardship.
Inside our manufacturing crew, the conversation around 1,3,5-Undecatriene always circles back to possibilities. This molecule doesn’t often end up in a consumer product with its original structure. Instead, it’s a driver of change in the synthesis of more complex molecules. Organometallic chemists rely on terminal alkenes, like those present in 1,3,5-Undecatriene, for ligation reactions or construction of conjugated backbone materials. We've sent drums to labs aiming to develop new polyenes and conducting polymers, each time paying close attention to customer requirements regarding trace metal contents and residual solvents.
It's easy to focus strictly on the technical application, but our practical experience nudges us to think bigger. Our technical support team, often staffed by chemists with bench and pilot plant backgrounds, listens to stories of both success and challenge. One research group, working from our 1,3,5-Undecatriene, shared data that their initial cyclization yields depended directly on the control of methyl- and ethyl-impurities, feedback that shaped our switch to a higher-resolution distillation column. Their progress, and ultimately their publication record, tied right back to the nitty-gritty of our sample purity — a fact that doesn't always show up in a specification sheet but matters in the messy world of experimental chemistry.
In fragrance and flavor sectors, 1,3,5-Undecatriene holds a more subtle role. Its green, slightly peppery aroma, reminiscent of freshly cut grass or peapods, gets extracted for top-note enhancers in complex aroma architectures. Lab technicians mixing trace blends say a few parts per million of a pure, fresh triene tip the olfactory balance — too much, and the blend veers toward harsh, too little, and the effect disappears. Aroma houses trust only proven batches, and our long-standing partners frequently request historical batch data to tie a product launch to a specific supply chain moment.
From our plant floor, the differences between 1,3,5-Undecatriene and similar unsaturated hydrocarbons are sharper than theory suggests. Compare it to 1,5,9-cyclododecatriene or 1,5-hexadiene: both may pique chemists' interest with multiple double bonds, but the spacing and chain length drive two divergent paths in reactivity and physical properties. 1,3,5-Undecatriene stays liquid under moderate ambient temperatures, moves easily through process lines, and maintains a manageable vapor pressure — handy for accurate dosing or vapor phase processes. Colleagues at customer sites have highlighted how this property alone keeps plant hazards in check, compared to more volatile homologues or ring-containing trienes.
Another clear distinction arises in cross-coupling and polymerization chemistry. The even spacing of double bonds in 1,3,5-Undecatriene enables reactions like selective hydrogenation, metathesis, and Diels-Alder cyclization without introducing ring strain or side products seen with more compact or cyclized trienes. We've watched research groups save weeks in purification steps by starting with our linear triene, rather than fighting side reactions from less predictable alternatives. We see these data points not as sales pitches, but as a map for where manufacturing choices intersect with scientific progress on the outside.
Storage is another unsung detail. Some competitors in the space package trienes in standard steel or aluminum drums. We learned the hard way that small batch contamination can arise from trace metal interactions, especially over longer periods or during temperature swings. That lesson guided development of our lined packaging solutions, now standard for all major shipments. Each packaging tweak results from field failures and factory troubleshooting, not armchair theory.
Open a valve in our plant at the wrong moment and you’ll catch the unmistakable aroma of a fresh-cut lawn. Handling 1,3,5-Undecatriene brings many into contact with true frontline chemistry. We run regular training on leak detection, protective equipment, and spill management — not through theoretical drills, but by involving the team in setting and reviewing new handling protocols after near misses. Our safety program grew out of direct observation, such as the time a gasket failure during a summer heat wave forced an unexpected plant shutdown and review of every O-ring in service. We share incidents internally to build a culture of transparency and learning, making sure that every new batch entering the fill line doesn’t bring yesterday’s mistakes with it.
The quality group doesn’t just rely on documentation. Before clearing any batch for dispatch, team members examine bottles under white light to spot subtle color shifts, sniff for off-aromas, and cross-check raw data. We believe this hands-on approach cuts through complacency. Years ago, a customer flagged a rise in saponification values, only discernible after repeated product failures on their site. A full root cause dive brought us back to a maintenance oversight in a spent catalyst trap. Prompt correction improved both our processes and kept that customer experimenting rather than explaining to superiors.
Data coming through from multiple points adds up to more than compliance paperwork. GC traces map purity, but we go further, validating every lot with NMR and mass spectrometry for heavier impurity profiles. Operations maintains a log of operator interventions, whether it’s a flow rate tweak or a filtration change. These records feed back into planning: efficiency improvements translate directly to both process safety and greener operations.
Supply chain partners, from drum manufacturers to logistics firms, contribute real-time updates on possible contamination risks en route. During warm months, we coordinate shipments to avoid temperature excursions, even if it means nonstandard shipping windows. In one peak season, a poorly ventilated truck led to internal drum condensation, prompting a redesign of our loading docks and carrier selection checklist.
We frequently invite feedback from customers using our material in scale-ups or new synthesis. Their insights feed back to product design. The team answers late-night calls about viscosity behavior, nonvolatile residue, and chromatographic oddities, because that frontline problem-solving sharpens product delivery far better than relying solely on generic guidelines.
Like any advanced material, 1,3,5-Undecatriene confronts its share of production pitfalls. During synthesis, dangling double bonds easily attract oxygen or stray acids, generating peroxides or polymeric byproducts before you know it. Early in our production, trace peroxides escaping detection led to off-color in customer blends. This forced an overhaul in our scavenger protocol, tightening both process cleansing steps and on-site detection with advanced peroxide monitoring.
Ventilation and vapor management run critical all through the plant. The odor, while pleasant in trace concentrations, can trigger complaints when escaping the building envelope. We addressed this with an overhaul of the plant headspace monitoring and secondary carbon filtering — not a small investment, but one that pays back by keeping neighbors and authorities at ease. Near misses with vapor emissions triggered joint training and new incident reporting standards, strengthening not just our own compliance, but trust within the community.
The specifics of triene handling extend to end users too, particularly in environments where product aging triggers new behaviors. Chemists working long reaction times monitor triene stability, watching for slow changes that could spoil costly reaction runs. We share our most up-to-date degradation kinetics and run workshops for customers implementing in-line process analytics. The aim isn’t to control every step outside our boundary, but to support success as far down the chain as our knowledge and experience allow.
Sustainability goals transform daily operations for us. The feedstocks for 1,3,5-Undecatriene historically stemmed from petroleum derivatives, but we continue to experiment with bio-derived precursors processed within existing infrastructure. Preliminary trials using green-chemistry principles, such as biocatalytic isomerization steps, cut waste streams and demonstrate that high-purity trienes don't always require legacy practice. While absolute transition remains a work in progress, every percent shifted to renewable sources reduces both carbon intensity and long-haul logistics risk.
Reducing energy input forms a near-constant thread in our process updates. By integrating waste heat recovery and optimizing reflux ratios in fractionation, our energy budget for each batch has dropped measurably. These changes do not happen overnight. Each tweak undergoes real-world stress testing to ensure downstream products still meet rigorously measured attributes demanded by both process chemists and formulation scientists.
Addressing recurring challenges depends on the interplay between skilled staff, equipment upgrades, and a willingness to test emerging technology. Direct feedback loops between product users and our in-house team prompt new R&D investment. Innovations like sealed transfer systems with auto-monitoring, higher-resolution analytical instrumentation, and digital batch tracking all came directly from these exchanges. Every year we allocate a portion of capital improvements specifically to projects suggested by both employees and trusted customer partners.
We do not claim to hold every answer. Our own teams rely on continuing education, outside collaboration with academic labs, and participation in industry working groups. Emerging applications for 1,3,5-Undecatriene — from next-gen polymers to new flavor architectures — demand manufacturing practices that look as much to the future as to the past. Those of us making the material stay grounded, knowing that a product’s reputation builds not from marketing, but from each batch shipped, each problem solved, and every failure converted to a lesson shared both inside the plant and out in the field.
Looking back at the journey with 1,3,5-Undecatriene, it's the combination of detail-focused craft and persistent discovery that keeps the process fresh. Many products traverse our lines, but few spark as many shop floor debates, training improvements, and customer collaborations as this linear triene. Every modification in process brings not only quality gains but long-term relationships anchored by reliability.
So, whether this molecule ends its journey as a key flavor note, a backbone for research, or a stepping stone in advanced materials, the lessons embedded in its manufacture ripple outward. We continue to invest in both people and technology, measure everything, and keep learning from every batch that leaves the plant. Reliability and traceability matter at every stage, and we stay committed to advancing both, knowing that trust is built in the details—batch by batch, year after year.