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3',4'-Dichloropropiophenone

    • Product Name 3',4'-Dichloropropiophenone
    • Alias 1-(3,4-Dichlorophenyl)propan-1-one
    • Einecs 216-582-8
    • Mininmum Order 1 g
    • Factory Site Tengfei Creation Center,55 Jiangjun Avenue, Jiangning District,Nanjing
    • Price Inquiry admin@sinochem-nanjing.com
    • Manufacturer Sinochem Nanjing Corporation
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    Specifications

    HS Code

    782098

    Chemical Name 3',4'-Dichloropropiophenone
    Cas Number 34841-35-5
    Molecular Formula C9H8Cl2O
    Molecular Weight 203.07 g/mol
    Appearance Pale yellow to white solid
    Boiling Point 309.0 °C at 760 mmHg
    Melting Point 54-57 °C
    Density 1.334 g/cm3
    Refractive Index 1.565
    Solubility Soluble in organic solvents, insoluble in water
    Flash Point 140.3 °C
    Pubchem Cid 12900214

    As an accredited 3',4'-Dichloropropiophenone factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.

    Packing & Storage
    Packing A 100g amber glass bottle labeled "3',4'-Dichloropropiophenone," sealed with a screw cap, features hazard symbols and safety instructions.
    Shipping 3',4'-Dichloropropiophenone is shipped in secure, sealed containers to prevent leakage and contamination. It is transported as a hazardous chemical according to applicable regulations (such as DOT, IATA, or IMDG), with clear labeling and appropriate documentation. Handling precautions and personal protective equipment are required during shipping and receiving.
    Storage 3',4'-Dichloropropiophenone should be stored in a cool, dry, and well-ventilated area, tightly sealed in a chemical-resistant container. Keep away from direct sunlight, heat sources, and incompatible materials such as strong oxidizers. Store it in a designated area for hazardous chemicals, with clearly labeled containers, and use appropriate secondary containment to prevent spills or leaks. Avoid moisture and humidity exposure.
    Application of 3',4'-Dichloropropiophenone

    Applications of 3',4'-Dichloropropiophenone in Industrial Manufacturing

    3',4'-Dichloropropiophenone is a specialized chemical intermediate essential to several regulated industrial synthesis routes. We supply consistent, high-purity grades meeting stringent downstream requirements, supporting scale-up for diverse manufacturing environments. This page details verified downstream scenarios involving this raw material, focusing on compliance, formulation, process, and real-world end products deployed in high-value sectors.

    1. Pharmaceutical API Intermediate Synthesis

    This compound functions as a building block in the multi-step chemical synthesis of select active pharmaceutical ingredients (APIs), particularly within the production chains for certain hypnotic or antipsychotic drug molecules in regulated environments. Manufacturers source it for its compatibility with chlorination and Friedel–Crafts acylation reactions, ensuring batch consistency and reducing the risk of detectable impurities in the final API. Precise usage control mitigates the risk of side reactions and upholds downstream product qualification during early-stage to commercial scale formulation.

    Industry compliance standards

    • ICH Q7 Good Manufacturing Practice for Active Pharmaceutical Ingredients
    • United States Pharmacopeia (USP) relevant monographs and general chapters
    • European Pharmacopoeia (Ph. Eur.) raw material validation guidelines
    • FDA 21 CFR Part 210/211 for cGMP Drug Manufacturing

    Typical usage ratio

    • 0.4%–2.0% molar ratio, depending on the desired API yield and target molecular transformation pathways. Adjusted according to stoichiometric requirements of subsequent condensation or acylation reactions.

    Downstream process integration

    • Introduced during the initial acylation or substitution step of API intermediate production, typically utilizing batch or semi-continuous reactors operating under inert atmosphere to control byproduct formation.

    Final product types

    • Pharmaceutical intermediates for sedative-hypnotic drugs
    • Precursors to antipsychotic agent APIs
    • Intermediates for controlled substance synthesis (regulated supply chain)

    2. Agrochemical Synthesis (Herbicide Production)

    Industrial herbicide manufacturers use 3',4'-dichloropropiophenone as a controlled-source acylating agent during the synthesis of chlorinated phenylpropionic acid-based herbicidal compounds. Its double-halogenated structure allows for selective transformation while maintaining strict control at each reaction stage, reducing the risk of incomplete conversion and undesired byproducts. Usage is monitored to comply with maximum residue limits (MRL) and regulatory traceability requirements.

    Industry compliance standards

    • FAO/WHO Joint Meeting on Pesticide Specifications (JMPS) purity benchmarks
    • ISO 9001:2015 Quality Management Systems for agrochemical raw materials
    • EU Regulation (EC) No 1107/2009 for Plant Protection Products
    • REACH Registration, Evaluation, Authorisation and Restriction of Chemicals

    Typical usage ratio

    • 0.8–1.5% by mass in the primary synthesis stage; precise proportioning based on desired output titer and plant-scale batch size.

    Downstream process integration

    • Charged as a core substrate in the first condensation or cyclization vessel when producing dichlorinated phenyl acid-based herbicides, typically following solvent recovery and filtration protocols to minimize downstream impurity loads.

    Final product types

    • Phenylpropionic acid series pre-emergent herbicides
    • Intermediate compounds for post-emergence chlorinated herbicide formulations
    • Bulk active ingredient (AI) for further downstream formulating into granules or EC concentrates

    3. Specialty Fragrance & Aroma Chemical Synthesis

    Certain aroma compound manufacturers employ this dichlorinated precursors to synthesize select halogenated aromatic ketones for fragrance bases. The compound’s structural motif facilitates Friedel–Crafts acylation, producing intermediates that display long-lasting scent fixation properties and stability, which have proven useful in formulating technical-grade fixatives used in home and personal care applications. Control of addition rates ensures end-product odor purity and eliminates off-notes.

    Industry compliance standards

    • IFRA Code of Practice and Standards for aromatic raw materials
    • ISO 9235:2013 Natural and synthetic aromatic substances procedures
    • Good Manufacturing Practice (GMP) for Flavourings (EU 1334/2008)
    • REACH safety data sheet and hazard labelling regulations

    Typical usage ratio

    • 0.2–0.5% in the synthesis stage, based on the desired concentration of fragrance base and downstream compatibility with alcohol or oil matrices.

    Downstream process integration

    • Fed into batch reaction vessels for acylation of aromatic rings, followed by distillation and purification to isolate the fragrance intermediate. Subsequent blending occurs under controlled temperature to preserve olfactory integrity.

    Final product types

    • Scent fixative intermediates for household fragrance bases
    • Long-lasting aroma components for technical odorant applications
    • Blending stock for fine fragrance or air freshener manufacturing

    4. Fine Chemical Intermediates for Dye Manufacturing

    3',4'-Dichloropropiophenone is introduced in the manufacturing of select chlorinated aromatic dye intermediates, promoting targeted halogenation for high-stability colorants. Its use enables strict batch quality control and enhances reactivity in synthesis streams initiating with halogen-substituted benzene derivatives. Efficient integration improves overall yield and ensures regulatory compliance regarding discharge limits for downstream residues.

    Industry compliance standards

    • OEKO-TEX® Standard 100 for dye intermediates in textiles
    • EN ISO 9001:2015 for chemical quality assurance
    • ZDHC Manufacturing Restricted Substances List (MRSL)
    • EU REACH Annex XVII Compliance

    Typical usage ratio

    • 1.0%–2.2% by weight depending on batch size and chromophore intensity required in the final dye molecule. Adjustments made per chromogenic route yield targets.

    Downstream process integration

    • Added during initial condensation or halogenation reactions of dye intermediate synthesis in glass-lined or stainless steel reactors, preceding sulfonation or diazotization as required by the color chemistry workflow.

    Final product types

    • Intermediate chemical standards for azo or anthraquinone dyes
    • Chlorinated dyestuff precursors for textile and fiber industries
    • Colorant components for specialty plastics and synthetic fibers
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    Certification & Compliance
    More Introduction

    3',4'-Dichloropropiophenone: Experience and Value from Direct Manufacturing

    Grasping the Character of 3',4'-Dichloropropiophenone

    No seasoned hand in the chemical field will overlook the demand for 3',4'-Dichloropropiophenone. Our own workshops consistently see its synthesis, showing just how much the market values this compound. In structure, it’s a clear member of the propiophenone family, formed by attaching two chlorine atoms to the aromatic ring of propiophenone. For the specialists who regularly work with ketones and their chlorinated analogs, this molecule opens several useful routes in substance development and downstream manufacturing.

    Having worked with chlorinated ketones for years, we’ve come to appreciate the nuance in their behavior—3',4'-Dichloropropiophenone isn’t a basic building block. There’s a specific reason why end users make the switch from simpler ketones or other monochlorinated versions. Two precise chlorine atoms at the 3’ and 4’ positions do much more than change a chemical formula—they influence physical properties and reactivity, offer new functional possibilities for process chemists, and drive project managers to rethink their work flows. We regularly receive feedback about this compound's pivotal role in tailored synthesis, crop protection intermediates, and pharmaceutical building blocks, confirming its adaptability to real-world requirements.

    Model and Specifications: What Matters in Practice

    On the shop floor, our production batches run for consistency, which matters more than any catalog description. 3',4'-Dichloropropiophenone in our output hits a reliable purity threshold—usually topping 99.5%, removing the headaches of unplanned isolations or inefficient post-processing. Actual users in the lab have told us about avoiding tedious purification thanks to a product that keeps impurities remarkably low. The typical model presents as a colorless to slightly yellow crystalline solid, with well-defined melting and boiling points that match with process controls in larger reactors. Whether the scale is a kilogram or several metric tons, buyers notice when there’s a shift in product clarity or odor; our teams conduct multiple analytical checks each cycle to keep quality up—and keep customer complaints down.

    We’ve measured solubility profiles across environments—3',4'-Dichloropropiophenone dissolves well in common organic solvents, which grants process flexibility for those blending or extracting other active substances. The physical resilience in temperature swings—even during storage or transport—plays into its reputation for being straightforward to integrate into downstream synthesis. Many users find that it behaves as expected in both batch and continuous flow processes, a result of both its chemical stability and our process control.

    Application and End User Feedback from Decades on the Floor

    Buyers tell us the main pull for this molecule comes from its performance as an intermediate in organic synthesis. The regular applications we see in client orders focus on complex pharmaceutical development, agricultural compounds, and specialty chemicals. Several pharmaceutical teams have highlighted its use as a precursor in advanced active ingredient synthesis, especially where controlled reactivity and selective halogenation become crucial. When agricultural synthesis teams visit the plant, they comment on its clean reactivity profile, speeding up processes that otherwise get bogged down by inconsistent feedstock.

    Our most experienced clients remind us that nothing tests a chemical like a full production cycle. Compared with mono-chlorinated or non-chlorinated propiophenone, the dichloro version responds differently in cross-coupling, Friedel-Crafts acylation, and halogen exchange reactions. There’s less chance for unwanted byproduct formation due to the deliberate placement of chlorine atoms, and users report smoother workups and less downstream scrubbing. Research chemists have confirmed that 3',4'-Dichloropropiophenone forms robust intermediates, especially in steps demanding strong electron-withdrawing groups to direct substitution. A recurring theme in feedback sessions: process steps become more manageable, with reduced monitoring for off-target species.

    Several process engineers have shared how this compound supports more predictable batch quality, especially when scaling from bench to plant. They trace reduced downstream solvent use and fewer complaints about tarnished glassware—a practical win for resource management. Users also mention the safety perspective: with a clear, repeatable melting point, plant staff feel more confident in charge prepping and reaction planning. In one pharmaceutical setting, a shift to our material meant fewer cycle interruptions and a higher yield in the target API synthesis—tangible bottom-line improvement that outmatches theoretical claims.

    Differentiation from Other Products: Lessons from the Field

    Suppliers sometimes treat chlorinated propiophenones as interchangeable, but applied chemistry doesn’t favor shortcuts. While mono-chlorinated and parent propiophenone variants serve their roles, the dichloro 3',4'- variant fills a gap between over-reactivity and under-performance. Our synthetic teams have tested parallel batches using single-chloro and double-chloro analogs; the results show that for advanced coupling reactions, especially those requiring high selectivity, 3',4'-Dichloropropiophenone wins out by a clear margin.

    Customers with exacting residue requirements turn to dichlorinated options when substrates push equipment or solvent tolerances. The standard propiophenone can sometimes introduce off-target states, increasing clean-up costs for high-value runs. Meanwhile, competitive products lacking the specific 3',4'- dichloro placement see higher rates of side reactions, especially under harsher conditions. We’ve witnessed clients try to cut budgets with byproduct-rich or less-pure versions, only to return for the managed, predictable behavior in our batches. Even the difference between ortho and para chlorination in analogs creates process headaches our product helps avoid.

    The distinction also plays out in how regulatory teams review synthesis histories. Regulatory submissions based on products derived from accurately chlorinated batch lots pass scrutiny more smoothly, reducing the timeline from pilot to registration. For those producing APIs and regulated substances, our in-house documentation of isomer ratios and batch traceability provides an edge. We see more repeat business from buyers who’ve recognized that substituting with generic chlorinated ketones leads to lengthy downstream remediation and unpredictable final assays.

    Nuts-and-Bolts Manufacturing Perspective

    This molecule’s specificity means our process chemists monitor every stage for contamination, especially chlorine source quality and reaction solvent cleanliness. Consistent yields demand a precise control in halogenation, followed by rigorous separation and purification. Staff undergo regular training in handling chlorinated feedstocks, and the plant’s multiple in-line sensors read every batch in real time for deviations. Years ago, investing in better purification columns and newer analytical equipment cut rework rates, paying back in higher overall output and lower operator stress.

    The market expects close batch reproducibility, especially under GMP-regulated scenarios. Process settings are logged for every run—a practice enforced after one batch years ago missed trace impurity release and led to client complaints. Adaptation to both small-batch and continuous synthesis means we adjust solvent and catalyst selection for each customer, rather than locking into a one-size-fits-all recipe. While that slows down order fulfillment in some cases, it protects against over-reactive byproducts and boosts customer retention.

    Down the line, strategic solvent selection helps us recover and recycle material, supported by in-house distillation infrastructure. Long-term contracts with buyers who care about sustainability have driven us to refine washing and extraction procedures. Several years back, a client-held audit pushed us to overhaul filtration—after the changes, routine samples now meet residue limits more comfortably. These hands-on lessons turn into daily practices that secure supply and shorten troubleshooting.

    Addressing Challenges in Sourcing and Application

    Sourcing any specialty chemical brings questions of purity, provenance, and reliability. We’ve watched waves of global demand drive inconsistencies in the wider market—especially as new traders and middlemen enter without knowledge of real-life implications. Several buyers have complained to us after bad experiences with inconsistent lots leading to wasted production time. Our team fields requests for both smaller pilot lots and larger orders, maintaining an open line with customer technical teams to explain any shifts in batch properties or test results.

    Supply chain disruptions impact the timeline of getting 3',4'-Dichloropropiophenone to end users. Our manufacturing team maintains a dual-vendor policy for raw materials, along with warehouse stockpiles that buffer against most hiccups. At the same time, buyers are increasingly requesting documentation covering everything from residual solvent content to transportation temperature records. To meet these needs, our record keeping stretches back through the full production pathway—everyone on the team knows that one overlooked solvent impurity can mean thousands lost in downstream value for a pharmaceutical customer.

    Environmental and occupational safety concerns shape our production approach, too. Chlorinated raw materials come with heightened regulations for emission controls, so we’ve installed air scrubbing and solvent capture equipment that keeps emissions far below legal thresholds. Workers have easy access to both standard and situation-specific personal protective equipment, and we run regular drills and training. This practical focus means customers see fewer interruptions due to compliance reviews or regulatory delays in delivery. In sectors like pharma and agrochemicals, small delays ripple out and hurt entire project timelines, so our approach focuses on getting product to users ahead of schedule, with compliance already checked off.

    Direct Feedback and Field Observations

    Navigating user feedback over the years demonstrates how 3',4'-Dichloropropiophenone outperforms common substitutes. Researchers often point to greater product robustness and lower lot-to-lot variability—attributes that come from deliberate, small-batch attention during production. A large manufacturer once switched mid-project from a mono-chlorinated product to this compound and reported smoother batch campaign outcomes and less downtime for line cleaning. This isn’t just a result down on paper—it’s hours saved and higher product throughput when teams cannot afford delay.

    Purchasers often highlight our technical support—every order prompts a conversation with technical staff, who routinely share practical guidance and documentation. Several customers relay that our willingness to troubleshoot a difficult synthesis or supply a custom package size makes the difference between a successful pilot and a failed scale-up. For R&D teams tasked with creating new synthesis routes, access to a steady supply of high-purity material means fewer project resets and more predictable progress. Some small-scale specialty chemical firms have pointed out that a reliable manufacturer stands out among middlemen, especially as pressures intensify for both cost and performance.

    Some clients worry about possible regulatory changes or restrictions due to evolving policies on halogenated substances. We remain in dialogue with key regulatory officers, adapting purification and waste handling systems to stay far ahead of new restrictions. In regions with stricter import checks, our administrative staff prep all required documentation in advance, smoothing customs processes for overseas buyers. Experience shows that early conversations and transparent recordkeeping prevent nearly all shipping and border delays.

    Lessons from Decades of Synthesis

    Chemists with years in the industry recognize how small differences in raw material quality ripple throughout production. Our plant has shifted its internal methods several times in response to both client requirements and evolving process controls. Today’s 3',4'-Dichloropropiophenone batches bear little resemblance to those we manufactured two decades ago, with modern analytical machines catching early-stage impurities and confirming chlorine ratios more exactingly than any previous era. This evolution isn’t driven purely by regulation but by feedback from the floor—client teams describe reduced incidents of side reactions, better product isolation yields, and easier analytical fingerprinting.

    Batch reproducibility stands as the root of continued demand. Even small deviations in melting range or solvent residue lead down costly troubleshooting paths for users, so plant staff devote extra attention to these basics. Our analytical chemists work closely with production supervisors, running comparison studies between new lots and historical gold standards. The consistent feedback loop and willingness to adjust plant conditions on the fly secure real value for those needing reliability rather than just commodity pricing.

    We’ve watched the market change as external players attempt to shortcut either synthesis complexity or documentation rigor. Some suppliers provide flashy specs but can’t stand up under close technical questioning, while over-promising traders often collapse when asked for regulatory backing or shipment traceability. Direct manufacturing teams like ours take a different route, investing in long-term stability, custom instructions for high-value users, and a rapid-response approach when technical snags appear mid-order.

    Understanding Tomorrow’s Needs

    We’re seeing new application trends emerge—from biomedical candidates requiring fine-tuned reactivity, to green chemistry pushes for more sustainable manufacturing. Every time clients introduce novel requirements, our team runs pilot batches in-house, using the same scrutiny applied to previous industrial syntheses. This early-stage validation keeps the product approachable for both longstanding users and labs pushing boundaries.

    The customer base for 3',4'-Dichloropropiophenone sets increasingly strict requirements on sourcing, purity, and process transparency. Our teams respond by tightening internal protocols, improving traceability, and integrating digital batch records. There’s no standing still—customer audits, process reviews, and even unscheduled supplier visits challenge us to maintain and upgrade practices. The cumulative expertise our staff build around each run—and the willingness to troubleshoot individual customer requirements—differentiates a direct manufacturer from those simply passing material along.

    As synthesis challenges grow in complexity, teams look to suppliers not just for a chemical, but for technical partnership—including real-time troubleshooting, alternate packing, and tailored shipment solutions. Manufacturers with decades of real-world synthesis—witnessing demand volatility, regulatory shifts, and practical safety incidents—adapt dynamically. The real strength behind a successful synthesis project frequently starts with dependable, tested materials prepared and delivered by those who live the production experience day in and day out.

    A Manufacturer’s Perspective: Trust Built on Hands-On Experience

    Decades of direct production confirm that trust arises not from sales claims or flashy datasheets, but from reliable output, forthright communication, and field-tested problem-solving. Teams using 3',4'-Dichloropropiophenone for complex projects need more than a generic commodity—they need each lot to deliver, each record to withstand audit, and each interaction to point toward a solid partnership. Feedback and experience shape each run, pushing us to keep standards rising while responding to evolving industry realities.

    As manufacturers, our pride stays tied to every kilogram leaving the warehouse—each one the result of careful planning, rigorous controls, and genuine commitment to end-user value. 3',4'-Dichloropropiophenone remains a centerpiece in both new synthesis projects and well-established industrial workflows, anchoring its reputation among chemists not due to chance, but because of continual hands-on refinement, customer-centered iteration, and a dedication to delivering solutions in every batch.