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HS Code |
913845 |
| Cas Number | 1631-53-0 |
| Molecular Formula | C9H9ClO |
| Molecular Weight | 168.62 g/mol |
| Appearance | Colorless to pale yellow liquid |
| Density | 1.137 g/mL at 25°C |
| Boiling Point | 229-231°C |
| Melting Point | -10°C |
| Refractive Index | 1.549 |
| Flash Point | 110°C |
| Solubility | Decomposes in water; soluble in organic solvents |
| Purity | Typically ≥98% |
| Synonyms | 4-Ethylbenzenecarbonyl chloride, p-Ethylbenzoyl chloride |
As an accredited 4-Ethylbenzoyl Chloride factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | 4-Ethylbenzoyl Chloride, 100g, is packaged in a sealed amber glass bottle with hazard labeling, inside a secondary protective container. |
| Shipping | 4-Ethylbenzoyl Chloride should be shipped in airtight, corrosion-resistant containers, properly labeled, and protected from moisture, heat, and incompatible substances. It is classified as a hazardous chemical and should be handled and transported following applicable regulations (e.g., DOT, IATA, IMDG), with precautions for toxic, corrosive, and environmental hazards. |
| Storage | 4-Ethylbenzoyl chloride should be stored in a tightly closed container, in a cool, dry, and well-ventilated area away from moisture and incompatible substances such as strong bases and oxidizing agents. Protect from direct sunlight and sources of ignition. Keep container tightly sealed and handle under a fume hood to prevent inhalation of hazardous vapors. Store at ambient temperature unless otherwise specified. |
Applications of 4-Ethylbenzoyl Chloride in Industrial ManufacturingAs a direct manufacturer of 4-Ethylbenzoyl Chloride, we support a range of specialized downstream sectors. This material serves as a vital acylating reagent and intermediate in strict industrial contexts, where only precise integration, compliance, and process reliability meet end-user requirements. 1. Photoinitiator Synthesis for UV-Curable Coatings4-Ethylbenzoyl Chloride plays a key role as a building block in synthesizing benzoin-derived photoinitiators, specifically for UV-curable inks, varnishes, and adhesives. Sourcing demands focus on minimal trace impurities and conformity to coating-grade specifications. This raw material reacts via Friedel–Crafts acylation with precursor aromatic alcohols, forming intermediates essential for high-reactivity photoinitiator molecules. End users in electronics, packaging, and automotive rely on these specialized photoinitiators for rapid, residue-free curing at ambient or low temperatures, supporting high-throughput production lines. Industry compliance standards
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2. Synthesis of Pharmaceutical IntermediatesThis material is frequently selected in the manufacture of key intermediates for pharmaceuticals, particularly those containing substituted benzamide or benzothiazole structures. Pharmaceutical plants deploy this reagent for controlled acylation reactions under GMP conditions, ensuring regioselectivity and minimal by-product formation. Documented use occurs in routes of certain antihistamines and anti-inflammatory compounds, with close attention paid to avoiding cross-contamination and preserving batch traceability. Industry compliance standards
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3. Agrochemical Active Ingredient ManufacturingThe compound is used as an acylating agent in the manufacture of advanced agrochemical molecules, particularly those derived from substituted benzamides and benzothiazoles targeting weed and pest resistance. Processing strictly monitors impurities and residual chloride content to meet agrochemical registration requirements. Integration in thioamide synthesis and benzamide group protection steps is favored for batch reproducibility and compliance in large-scale production. Industry compliance standards
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4. Synthesis of Organic Photovoltaic and OLED MaterialsProducers of advanced optoelectronic materials utilize this acyl chloride in synthesizing electron donor–acceptor compounds for organic photovoltaic (OPV) cells and organic light-emitting diodes (OLEDs). Reaction parameters are tightly controlled to optimize the purity of aryl-acyl functional groups, enhancing final device efficiency and stability. These specialized oligomers and polymers require traceable raw inputs, and material enters the process at the primary acylation stage of small-molecule synthesis targeting light absorption tuning. Industry compliance standards
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5. Custom Aromatic Acid Chloride Manufacturing for Specialty PolymersSpecialty polymer producers employ this compound as a functional acyl source in custom polyamide, polyimide, and polyester syntheses. Strict process validation ensures low residual chloride and precise molecular weight distribution in the polymer chain. The feedstock enters condensation reactions where high thermal and chemical stability is required, contributing unique side-chain features for tailored polymer characteristics such as enhanced solubility, heat resistance, or film flexibility. Industry compliance standards
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6. Fragrance Intermediate SynthesisThis material finds application as an acylating agent in producing high-purity aromatic esters and ketones for the fragrance sector. Narrow impurity profiles, strict control over chlorinated byproducts, and adherence to flavor and fragrance safety standards ensure output suitability for personal care, detergents, and household products. The compound reacts with substituted alcohols or phenols to yield intermediates delivering desired olfactory profiles. Industry compliance standards
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Working in chemical manufacturing offers a front-row perspective on how raw materials turn into valuable compounds for industry. Over the years, our team has built a deep familiarity with the nuanced needs of customers seeking intermediates like 4-Ethylbenzoyl Chloride. This compound, known among chemists for its role in a variety of synthesis routes, rarely receives attention outside lab circles, yet its behind-the-scenes contributions shape the success of many downstream products.
4-Ethylbenzoyl Chloride, recognized by its molecular formula C9H9ClO, starts with a clear, pale liquid structure. We produce this material with focus on purity and stability, guided by decades of experience using phosgenation and chlorination technologies. Tight process control ensures each batch meets high standards for content and low impurity profiles, a point of pride in our daily operations. We typically hit a purity range above 98%, with controlled moisture content and minimal byproducts—standards local and overseas coatings or pharmaceutical clients expect.
The difference between commodity chemicals and fine intermediates often comes down to attention paid at multiple steps along the process line. For 4-Ethylbenzoyl Chloride, small tweaks create real change: adapting reaction times, holding temperature curves steady, optimizing packing protocols for seasonal shifts in humidity. These adjustments shape a final product with low color and high chemical reactivity—qualities impossible to quantify until you see how downstream users react to even trace contamination or inconsistent performance.
We get frequent requests for customization. Sometimes, a pharmaceutical R&D team requests a low-residue material, while another client building UV-curable coatings needs exacting chloride levels. Decades of experience teach us to never shortcut analytical monitoring: we run GC, HPLC, and often NMR checks, not because standards say so, but because we've learned the cost of inconsistent batches through hard-won experience. Each new customer story brings new tweaks, from solvent traces to stability test profiles.
Batches of 4-Ethylbenzoyl Chloride cannot all be identical—despite hopes to the contrary. Manufacturing at scale introduces subtle batch-to-batch variation, driven by everything from minor differences in starting material to small fluctuations in ambient temperature. We learned early in our history to communicate these realities honestly rather than mask them in a wall of silence. Before shipments leave our site, we match our QC documents to actual output, not theoretical numbers. Customers in specialty chemicals and pharmaceuticals have come to rely on this approach. If something drifts, we don’t hide it—we address it.
Our typical models deliver content greater than 98% by GC with careful control of water content and acid chloride byproducts. We use rugged kegs with lined internals, designed for safe storage and reliable pouring, because our own teams know the dangers of accidental leaks or unhappy storage conditions. This is no place for packaging shortcuts. Even opening drums in less-than-ideal environments can affect downstream application, especially in photoinitiator synthesis where minute moisture changes alter reactivity. Our warehouse hands triple-check seals and track every lot number. No one wants surprises.
Feedback from actual users shapes our practices. Early attempts at producing 4-Ethylbenzoyl Chloride led to unexpected complaints from focus groups in fine chemical production. Problems ranged from unpleasant odor to unusual haze issues in photoinitiator blends. Rather than blaming the process, we invited operators and technical staff from customer sites to visit our facility, walk through the process lines, and discuss pain points openly. These early conversations radically improved our practical approach. Today, field reports from formulation chemists and line operators help us pinpoint opportunities for incremental improvement—sometimes as simple as fine-tuning filtration mesh size or tweaking blend rates.
Most end-users don’t ask for the technical backstory, but they notice the result. In tight polymer syntheses, unrecognized impurities throw off product color or reduce shelf life. A handful of times, switching to 4-Ethylbenzoyl Chloride with more consistent analytical profiles resolved weeks of troubleshooting at our clients’ plants. This sort of back-and-forth, built on trust and technical openness, benefits both sides. Real-world performance matters more than paper specifications.
Inside our production meetings, we inevitably discuss demand shifts tied to downstream market moves. 4-Ethylbenzoyl Chloride isn’t made for end use, but its role as an acylating agent feeds non-stop innovation, especially for photoactive compounds and specialty pharmaceuticals. Markets for UV curable resins, often used in high-gloss coatings, adhesives, or printing inks, force us to keep our quality high—any slip shows up in end-users’ failure curves, sometimes months after product deployment.
Companies synthesizing photoinitiators such as ethyl-4-benzoylbenzoate rely on this material to bring precise control into their reactions. The product’s reactivity, combined with manageable volatility, supports easier isolation of target initiators. In pharmaceutical pathways, 4-Ethylbenzoyl Chloride acts as a key building block, supporting modifications of complex molecules. We’ve watched it unlock new intermediates for antihistamines or anti-inflammatory drugs. It’s gratifying to know that what starts in our reactor—after stringent purification and QC—ends up anchoring lifesaving therapies or novel consumer goods.
Coating specialists and research chemists often mention the convenience of working with this compound compared to bulkier or more hazardous benzoyl chlorides. Unlike higher-substituted counterparts or halogenated variants, 4-Ethylbenzoyl Chloride balances commercial scale with tolerable safety margins. Shelf stability improves over open-chain analogs, assuming containers remain tightly closed and away from humid air. Our shipping team has learned to treat every drum as a ticking clock, minimizing transit and turnover time, all to maintain that crucial freshness.
Working on the floor with our QA staff gives a daily reminder: not all benzoyl chlorides behave the same. 4-Ethylbenzoyl Chloride differs in several key ways from the more familiar unsubstituted benzoyl chloride or substituted derivatives like 4-methylbenzoyl chloride. These differences prove vital for both safety and performance. For instance, adding an ethyl group at the para position reduces volatility and often cuts down on irritating fumes during handling, especially compared to smaller, more volatile analogs. Workers in both chemical synthesis and final application benefit from these improvements, since fewer airborne byproducts mean safer, more comfortable working conditions.
In photoinitiator synthesis, we hear from researchers that the electron-donating ethyl substituent slightly shifts reactivity compared to the methyl or chlorine versions. This seemingly minor difference shapes selectivity in coupling reactions, helping users reach higher yields and cut down on complex purification steps. Anyone who’s worked up a batch of a chromatographically challenging intermediate appreciates saving even a few percent on separation headaches. Reliability holds special importance for those running pilot batches, as scale-up always brings unwelcome surprises.
We’ve run comparisons in-house between 4-Ethylbenzoyl Chloride and other para-substituted benzoyl chlorides, especially for customers seeking distinct properties in polymerization catalysts or tailored fine chemicals. The lessons learned led us to recommend 4-ethyl versions when users report trouble with halogen introduction or regulatory scrutiny around persistent halides. This isn’t abstract knowledge—it comes from dozens of collaborative tech calls and shared troubleshooting sessions where clear, personal communication solved bottlenecks faster than any specification sheet or online resource could.
Environmental and safety compliance drive adjustments in every corner of our production chain. Our technical staff pays attention to updated guidelines from regulatory agencies, realizing that client industries—especially pharmaceuticals and specialty chemical companies—face stricter documentation each year. We upgraded our emission abatement and waste treatment lines to keep pace with these evolving standards. Teams logging materials movement and venting flow rates know the numbers, because we connect their daily work with regulatory priorities.
Communicating risks and protection methods ranks high in our everyday practices. 4-Ethylbenzoyl Chloride demands strict attention to PPE and ventilation during handling. Direct skin contact or inhalation is not tolerated in the plant. We provide thorough, practical instruction to every newcomer, showing rather than telling how to load, transfer, and quench unreacted material safely. Mistakes from the early days—such as inadequate venting or poor neutralization practices—created avoidable injuries and environmental headaches. Learning directly from accidents, we retooled both procedures and equipment to prevent repetition. These lessons echo through every SOP revision and every conversation with clients dealing with local compliance changes.
Shipping large drums across borders brings a fresh set of documentation and labeling challenges. We invest time ensuring that our labels and SDS documents line up with the actual characteristics of the shipped batch, rather than relying on generic templates. If any incident occurs in the logistics chain, customers want—and deserve—complete transparency about what they are managing. In return we expect open dialogue from users about any difficulties encountered in storage or handling at their own sites.
Lessons learned from in-house and client-side troubleshooting stick with us. One memorable instance saw a customer’s production line suddenly failing critical photoinitiator specifications. Over multiple batches, haze and discoloration crept into what had been a smooth-running process. At the customer’s request, we ran parallel pilot batches using retained samples from our original lots, verifying via analytical test logs where the drift began. It soon became clear that a minor shift in intermediate purification—initially flagged by a junior technician—created trace byproducts that regular panel screening failed to catch. The fix meant more than adjusting a pump timing; it demanded extra filtration steps and deeper QC at every checkpoint.
Rather than burying the error, we ran joint tests and shared findings both ways. This willingness to acknowledge the ripple effects of small changes—sometimes imperceptible without cross-functional expertise—lets us keep improving. Clients who become partners in this process play a crucial role. Only real-world application data shows the full impact of any modification, as downstream processes and product end-use environments rarely match textbook assumptions.
Few products in our plant draw as much technical scrutiny during production as 4-Ethylbenzoyl Chloride. The harsh truth is, standards only solve part of the problem. Continuous process feedback ties together chemists, production workers, logistics teams, and customers. Sometimes this means tracking unexpected changes in feedstock quality or accounting for subtle increases in local humidity. We see our role not just as a supplier but as a technical partner, ready to discuss process tweaks, investigate off-spec trends, or rapidly rerun QC when something feels off.
Investment in analytical infrastructure pays back each time an outlier appears. Our team uses a mix of new and time-tested instrumentation to catch drift before it hits our customers’ lines. We choose Karl Fischer titration for water content, trust gas chromatography to catch trace volatiles, and keep a set of retention samples matched to every production campaign. Each analytical run gives us a real confidence level, not just a ticked box on a checklist.
Feedback loops matter just as much. Users can reach our technical staff to discuss practical challenges—sometimes these boil down to drum-handling quirks or environmental shifts outside the original scope. We gather and review customer-reported issues monthly, selecting key cases to investigate in-depth. Over time, these loops expose blind spots in both manufacturing and logistics, leading to upgraded packing materials, improved training, and better preventive maintenance. The human side—the willingness to respond quickly, pick up the phone, or visit a customer’s site—makes the biggest difference.
Product evolution in chemistry rarely stops. Clients building next-generation materials bring us requests for finer control over impurity profiles, greater transparency around batch data, and tools to dovetail with digital inventory management. We upgraded our documentation systems to better sync with customer ERP links—simple on paper, but tough in legacy factories. Each adjustment, whether driven by technology upgrades or shifting regulatory landscapes, pushes us to reassess standard routines.
Globalization amplifies pressure for lower impurity content and real-time tracing from batch production to end-use shipment. Our QA and IT staff constantly adjust tracking and analytics. Some years, tight supply chains force adaptations in sourcing, compelling us to validate new upstream producers against challenging in-house benchmarks. At each turn, the reality in high-value intermediates is clear: small differences in process or documentation create outsized impact downstream. We keep adapting through constant training, open technical exchange, and a simple commitment to follow issues to their real root.
Decades in the business bring both hard lessons and enduring relationships. The real test of a chemical intermediate is the story told by its partners—how quickly issues are spotted, how openly teams work across project boundaries, and whether mutual trust speeds resolution. In practice, the conversation around 4-Ethylbenzoyl Chloride always returns to daily discipline—reactors tuned by seasoned eyes, QC double-checked by hands that know the cost of a mistake, and the constant back and forth with customers who trust us to know not just the numbers but the realities behind them.
From the first handoff in the lab to final delivery at a distant plant, teamwork and technical dialogue decide success. 4-Ethylbenzoyl Chloride sits at an unassuming place in countless production chains, but the dedication that goes into every batch reflects our commitment to quality, transparency, and continued adaptation. Whether a client produces photoinitiators, specialty resins, or new pharmaceuticals, they count on a supplier with both the technical depth to deliver what’s needed and the practical grit to fix problems as they come up.
In the world of chemical intermediates, 4-Ethylbenzoyl Chloride demonstrates that performance comes from attention to detail, open communication, and relentless pursuit of improvement. Our teams know that each lot shipped represents both an outcome and a promise—one built on years of learning from the production floor, the customer’s plant, and the fast-changing requirements of global industry. Our work speaks through the performance of the products our customers make, through safer and smoother operations, and through problems solved before they grow.
Looking ahead, continued partnership and honest feedback will define the next stage in this material’s story. With every shipment, every technical inquiry, and every process challenge, our ground-floor expertise translates into reliability for everyone counting on 4-Ethylbenzoyl Chloride in their critical applications.