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HS Code |
941613 |
| CAS Number | 2039-26-5 |
| Molecular Formula | C4H8O |
| Molar Mass | 72.11 g/mol |
| IUPAC Name | but-2-en-1-ol |
| Appearance | colorless liquid |
| Density | 0.848 g/cm³ (at 20°C) |
| Boiling Point | 81-82°C |
| Melting Point | -116°C |
| Flash Point | 16°C |
| Solubility in Water | miscible |
| Refractive Index | 1.414 (at 20°C) |
| Synonyms | crotyl alcohol |
As an accredited 2-Buten-1-Ol factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | A 100 mL amber glass bottle labeled "2-Buten-1-ol, CAS 590-18-1," tightly sealed, with hazard and handling instructions. |
| Shipping | 2-Buten-1-ol is shipped in tightly sealed containers, typically made of glass or chemical-resistant plastic, to prevent leakage and contamination. It should be transported as a flammable liquid under cool, well-ventilated conditions, away from sources of ignition. Appropriate labeling and adherence to relevant safety regulations are essential during shipping. |
| Storage | 2-Buten-1-ol should be stored in a cool, dry, and well-ventilated area, away from sources of ignition and incompatible substances such as strong oxidizers and acids. Keep container tightly closed when not in use. Use chemical-resistant containers and avoid exposure to light and moisture. Proper labeling and secondary containment are recommended to prevent leaks or accidental exposure. |
Applications of 2-Buten-1-Ol in Industrial ManufacturingAs a direct manufacturer, we supply 2-Buten-1-Ol for specialized applications in the fine chemical, coatings, agrochemical, and pharmaceutical sectors. Below, we detail key industrial downstream uses, specific technical integration, regulatory requirements, and final product outputs. 1. Synthesis of Agrochemical IntermediatesLeading crop protection companies select 2-Buten-1-Ol as a C4 synthon in the preparation of herbicide and insecticide intermediates. The alcohol group enables precise nucleophilic additions and esterification with acid chlorides under controlled temperature and solvent conditions. This intermediate supports downstream synthesis of flame-retardant or active pesticide molecules without introducing unwanted by-products. Industry compliance standards
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2. Acrylic Resins and Functional Polymer PrecursorCoatings and inks manufacturers apply 2-Buten-1-Ol as a reactive monomer or unsaturated chain extender in acrylic polymer production. The unsaturation and hydroxyl functionality provide dual sites for controlled radical or condensation polymerization. This integration enables fine-tuning of drying profiles and surface crosslinking in UV-cured or thermosetting finishes, boosting adhesion and weather resistance for industrial coatings. Industry compliance standards
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3. Pharmaceutical Intermediate for Active Ingredient SynthesisProducers of API intermediates leverage 2-Buten-1-Ol in multistep syntheses. The material provides a reactive unsaturated alcohol moiety, allowing selective transformations such as hydroboration-oxidation, Grignard additions, or protective-group installations. With strict process documentation and GMP control, manufacturers precisely convert the raw material to chiral or functionalized building blocks relevant in cardiovascular, antiviral, or CNS drug pathways. Industry compliance standards
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4. Scent and Flavor Ester ProductionManufacturers of food-grade esters use 2-Buten-1-Ol in enzymatic or acid-catalyzed reactions to produce unsaturated esters for fragrance and flavor applications. The process requires careful catalyst selection and impurity monitoring due to direct food and cosmetic integration. The resulting ester delivers distinctive fruity, green, or floral notes with good volatilization and stability profiles for consumer brands. Industry compliance standards
Typical usage ratio
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Walking through our plant, the sharp, slightly sweet scent of 2-Buten-1-Ol signals a fresh batch in progress. This compound, also known as crotyl alcohol, has been one of our mainstays among unsaturated alcohols. We dedicate a specific line to this product to avoid cross-contamination, focusing on purity for chemists who rely on consistent batch quality. With a molecular formula of C4H8O, every step in our process is tracked and recorded by experienced technicians, most with hands-on training stretching back years.
Every batch is produced under tight controls, utilizing reactors designed to handle its volatility and reactive double bond. During purification, we combat trace aldehyde or isomer formation with fractional distillation, and in-line GC analysis helps us spot deviations early. With a minimum purity of 99%, the transparent liquid leaving our line aligns with customer expectations across specialty chemical applications. Water content and volatile impurities never go unchecked; our operators know that skipping a dehydration round cannot happen in practice. Oversight is routine rather than exception.
Long before wide adoption in fine chemicals or pharmaceuticals, 2-Buten-1-Ol had its place in flavors and fragrance intermediates. Some of our veteran team remember producing small lots for pioneering flavor houses. Today, our output moves to labs and plants working on crop protection agents, advanced solvents, and functional monomers for plastics. Precision in our process supports downstream applications where even minor off-specs can throw off reaction yields. Practical experience taught us to keep oxygen excluded throughout storage—2-Buten-1-Ol can oxidize, affecting even the most robust formulation.
Synthetic organic chemistry depends on reliable starting materials. Crotyl alcohol features an accessible alcohol group and an activated double bond, making it a functional building block for aldol reactions, esterifications, and etherifications. Pharmaceutical routes often utilize its ability to build up carbon skeletons via Grignard or organometallic reactions. Flavor chemists count on the right isomer—our process strictly produces the trans form as requested. Over a decade refining this route has eliminated key by-products that formerly troubled end-use reactivity and flavor quality.
There’s an ocean of difference between shipping commodity grades and manufacturing specialty batches under customer-driven specs. When a partner requests 2-Buten-1-Ol with a narrow boiling range or extra low aldehyde count, we don’t hand off the order—we roll up our sleeves, set reactor conditions, and document the run. This in-house approach means direct feedback loops when a user notices issues in their synthesis. Our plant manager walks the lines weekly, reviewing QC logs in person and troubleshooting bottlenecks before they reach our customers’ labs.
The demand has shifted from multi-ton lots for flavor houses to two-digit kilogram custom orders. Pharmaceutical companies value transparency in handling and packaging, especially for sensitive alcohols. We meet cleaning standards prior to filling, use argon blanketing, and never reuse drums for high purity lots. Regular maintenance ensures no foreign matter enters the product stream. Users can trace every drum back to a defined production date, and batch control sheets capture every process adjustment.
Specifications don’t help unless they connect to real-world use. A high-assay product should meet chromatographic and NMR benchmarks, but people in the plant recognize that clarity, odor, and viscosity reveal quality firsthand. It takes an operator’s eye to spot suspicious color shifts or a reactor tech’s nose to catch unusual odors hinting at impurity formation. Whether supplying a research group experimenting with new esters, or an agrochemical firm scaling pilot batches, we keep our sight on what end users actually see and handle—not just numbers on a sheet.
Some clients pursue the lowest aldehyde possible for polymerization. We’ve adapted with extra purification—turning a production constraint into a distinct advantage for anyone synthesizing reactive intermediates or crosslinkers. Requests for documentation supporting REACH, GHS, and food-use guidelines come directly to us, and our compliance engineers maintain up-to-date registration and safe use protocols. This on-the-ground vigilance supplies peace of mind to partners with audit checklists in tow.
Trans-2-Buten-1-Ol is more than a tool for textbook organics. Research chemists value it for its ability to act as a synthon where regioselectivity and functional group compatibility matter. Some of our longer-standing customers have shared how slight changes in residual water or by-product profile can tip a reaction from success to frustration, especially in fine chemical projects with demanding specs. Polymer manufacturers use it to introduce crosslinkable sites in specialty formulations, leveraging its unsaturation without compromising backbone flexibility.
A large chunk of volume still goes to flavor and fragrance manufacturers. Crotyl alcohol’s mild, waxy aroma finds its way into leaf notes and floral bouquets. While newer syntheses have shifted to other unsaturated alcohols, this compound holds steady demand for unique profiles. Our batch-to-batch consistency preserves subtle characteristics valued by creative chemists. The knowledge learned running years of micro-distillations for one fragrance client now informs every kilo leaving our packaging hall.
Within unsaturated alcohols, differences matter. Buten-1-ol sets itself apart from linear alcohols like 1-butanol or simple unsaturates like allyl alcohol. Its trans and cis isomerism means the double bond’s position and geometry influence both reactivity and olfactory characteristics. In a polymerization workflow, chemists note improved selectivity compared to more reactive allyl alcohol, while flavorists appreciate the muted pungency.
With 1-butanol, solubility and reactivity shift; users who require higher hydrophobicity or longer chain effects choose differently. Allyl alcohol, by contrast, carries much greater toxicity and reactivity, brought on by the terminal double bond—a concern in open handling situations. Crotyl alcohol balances ease of handling and moderate reactivity, giving formulators a safer path for introducing unsaturation without excessive volatility.
We’ve tried adapting our purification train to similar products, only to find that buten-2-ol isomers demand separate lines. That knowledge, earned from mistakenly combining runs early in our manufacturing history, led to dedicated storage and handling facilities. Mistakes can’t undermine quality—nobody wants an unintended isomer to sabotage a tired organic syntheses team hundreds of kilometers away.
Visit a pharmaceutical research lab and you’ll find 2-Buten-1-Ol feeding into routes for antiviral compounds, intermediates for neurological therapies, and experiments on molecular scaffolding. These teams often need small bottles, supported by thorough analytics, rather than tankers. We support this work with customized filling and supporting paperwork, drawing on experience meeting pharma’s sterility and traceability expectations.
In the plastics and coatings sector, 2-Buten-1-Ol’s ability to crosslink or supply reactive side groups gives it a spot in specialty resins and lithographic materials. End users in these businesses routinely visit our facility, assessing not just our compliance but our working culture—trust builds batch by batch. They bring fresh feedback: reminders that any change to manufacturing, be it a reactor retrofit or a solvent switch, must be communicated and validated against their own standards.
Agrochemicals present another set of demands. 2-Buten-1-Ol once flowed into pilot scale runs for plant protection products, especially where gentle reactivity or ease of further conversion mattered. We learned to package for seasonality—tight timelines, high QA expectations, and a need for flexible batch sizes all shape our production scheduling. Field operators count on certainty: no unexplained delays, clean transfer, every drum labeled by date and content, not marketing language.
Staying competitive rests on operational discipline and steady adaptation. Over the years, we’ve replaced manual batch logs with integrated digital controls, cutting errors and making traceability easier. Training stretches beyond SOPs to cover troubleshooting, root cause analysis, and preventative maintenance, helping head off many issues before they affect product. Line operators have authority to halt production if plant conditions threaten to compromise quality.
Feedback loops run strong. If a user finds variance in esterification rates, we review process data with them line by line, seeking out overlooked heat gradients or recycled solvent purity. We don’t wait for quarterly audits—every QC report is an opportunity to refine procedures. Working alongside downstream users gives us direct insight into unexpected reactivity or storage quirks, long before issues scale to bigger problems.
We’ve been able to cut down residual aldehydes by experimenting with fractionation columns, guided by end-user test reactions rather than isolated lab specs. In regions with tight VOC regulations, we invested in vapor recovery and improved sealing, ensuring product integrity while passing environmental checks. On request, we shift to smaller lots or custom containers, drawing on experience in warehouse logistics and global shipping.
While 2-Buten-1-Ol finds reliable demand, the supply chain presents constant challenges. Propylene price swings, shifts in energy availability, and new regulatory requirements keep us on our toes. Our procurement team sources raw materials from long-standing partners, knowing that a bad batch upstream will reverberate all the way to the final flask. Regular visits and third-party audits provide transparency and build mutual trust.
Reach compliance, hazard labeling, and user safety drive upgrades to our labeling, SDS, and export documentation. End users in certain regions require documentation not just in English, but localized for their regulatory authorities; we answer these requests in-house, sparing clients the hassle and legal risk of non-compliance. Product safety goes beyond paperwork—on-site training for our warehouse crew now covers updated handling protocols based on GHS and specialized local rules.
Temperature-sensitive shipping creates another hurdle. We use temperature loggers and insulated packaging for susceptible lots, supported by weather tracking before shipping. We’ve learned that insurance doesn’t fix a degraded batch—direct precautions and seasoned logistics staff are what deliver good product from our warehouse to the customer’s lab or process tank.
We don’t just make 2-Buten-1-Ol—we know its quirks, hazards, and potential from years of seeing hands-on results. Our team finds pride in the technical details: getting the GC trace as clean as possible, orchestrating safe loads on shipping day, racking up batches that pass the toughest client tests on the first go. Crew members debate subtle changes in odor or viscosity, relying on shared memory and sustained attention rather than just lab instruments.
In a market filled with generic options and gray-market intermediates, we offer direct accountability and honest communication. Every misstep and process bottleneck has pushed us forward, always closing the gap between lab theoreticals and real-world production. Our regular clients appreciate our transparency—if specs drift or a shipment is delayed, they hear it from us directly, along with our plan to set things right.
Investment in processes and people keeps us relevant as regulations tighten, applications diversify, and downstream innovations demand new grades. We’re piloting greener processes for crotyl alcohol, based on bio-feedstocks—an effort sparked by users balancing cost, sustainability, and technical needs. Our continuous process reviews draw lessons from every customer feedback, internal audit, and failed QC check. We see product quality as a living target, always subject to improvement.
As the industries using 2-Buten-1-Ol advance, we adapt with them. Our technical support doesn’t stop at batch release: we consult on storage conditions, offer process troubleshooting, and help users bridge gaps between theory and shop-floor reality. Chemists designing new syntheses value a partner who recognizes not just the chemical’s formula, but also the thousand small decisions that shape its utility.
We measure our track record not in tons shipped but in return customers and successful downstream reactions. 2-Buten-1-Ol serves as more than a sales entry—it’s a specialty chemical whose role deepens with the experience of those who handle it. We have learned what separates a great batch from a mediocre one, and we stand behind every shipment. Our day-to-day work—refining logistics, tightening specs, accommodating new requests—demonstrates an ongoing commitment to excellence, built on years of hard-earned know-how on the plant floor.