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HS Code |
680340 |
| Chemical Name | 1-(3'-Chlorophenyl)-3-Methyl-5-Pyrazolone |
| Cas Number | 89-00-9 |
| Molecular Formula | C10H9ClN2O |
| Molecular Weight | 208.65 |
| Appearance | White to off-white crystalline powder |
| Melting Point | 208-212°C |
| Solubility In Water | Slightly soluble |
| Purity | Typically ≥98% |
| Iupac Name | 3-methyl-1-(3-chlorophenyl)-1H-pyrazol-5(4H)-one |
| Synonyms | 3-Methyl-1-(3-chlorophenyl)-5-pyrazolone |
| Storage Conditions | Store in a cool, dry place |
| Safety Precautions | Avoid inhalation, skin and eye contact |
As an accredited 1-(3'-Chlorophenyl)-3-Methyl-5-Pyrazolone factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | White HDPE bottle with a tamper-evident cap, labeled “1-(3'-Chlorophenyl)-3-Methyl-5-Pyrazolone, 25g,” with hazard and handling instructions. |
| Shipping | 1-(3'-Chlorophenyl)-3-Methyl-5-Pyrazolone is shipped in tightly sealed containers, protected from light and moisture. It must be labeled according to hazardous chemical regulations and transported under cool, dry conditions. Standard shipping methods apply unless otherwise specified by safety data guidelines or regulatory requirements for potentially hazardous organic compounds. |
| Storage | Store **1-(3'-Chlorophenyl)-3-Methyl-5-Pyrazolone** in a tightly sealed container, protected from light and moisture, in a cool, dry, and well-ventilated area. Keep away from incompatible substances such as strong oxidizers. Store at room temperature or as specified on the manufacturer's safety data sheet. Clearly label storage containers, and restrict access to trained personnel only. |
Applications of 1-(3'-Chlorophenyl)-3-Methyl-5-Pyrazolone in Industrial ManufacturingAs an experienced manufacturer specializing in advanced pyrazolone derivatives, we supply 1-(3'-Chlorophenyl)-3-Methyl-5-Pyrazolone to global industrial partners requiring consistent quality and fully traceable origin. Below, we detail major downstream use cases where this intermediate delivers value across process chemistry, with full transparency regarding compliance benchmarks, exact formulation range, integration stage, and product types. 1. Synthesis of High-Performance Disperse Dyes for Polyester FibersLarge-scale textile dyeing and finishing operations utilize this pyrazolone derivative as a key coupling component in the azo dye synthesis for disperse dyes targeting polyester substrates. Its electron-withdrawing chlorine ring enhancement increases lightfastness and color stability during high-temperature batch dyeing processes. Manufacturers calibrate batch input based on required dye shade depth, dispersion efficiency, and regulatory colorant purity for apparel and technical textiles. Industry compliance standards
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2. Pharmaceutical Intermediate for Antipyretic and Analgesic Bulk APIsThe compound serves as an advanced intermediate in the multi-step chemical synthesis of certain pyrazolone-structure APIs widely applied in generic analgesic and antipyretic drugs. Its high purity supports reproducible reaction yields, and traceability aligns with serialization and audits for good manufacturing practices in the pharmaceutical sector. Industry compliance standards
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3. Raw Material for Agrochemical Azo Dye Tracers and MarkersAgrochemical formulators use this pyrazolone derivative to produce coloring agents that serve as visual tracer dyes in hydrophobic pesticide and herbicide blends. High weather resistance, chemical inertness, and compatibility with emulsion and suspension concentrate carriers are key advantages supporting label compliance and application safety in field conditions. Industry compliance standards
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4. Intermediate for Specialty Printing Ink ColorantsProducers of high-performance colorants for solvent- and water-based printing inks integrate this compound for the manufacture of stable azo pigments exhibiting strong chemical resistance and color brilliance. Its 3’-chlorophenyl substitution improves pigment fastness under exposure to sunlight and solvents, supporting advanced ink formulations for packaging and graphic arts. Industry compliance standards
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5. Intermediate for Laboratory Reagents and Analytical DyesAcademic, diagnostic, and quality control laboratories require high-purity pyrazolone derivatives in the controlled synthesis of analytical dyes for spectrophotometric assays and colorimetric titrations. The compound’s defined reactivity enhances development of precise color-change indicators and metal-complexation reagents for scientific use. Industry compliance standards
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At our production facility, we have worked with 1-(3'-Chlorophenyl)-3-Methyl-5-Pyrazolone for years. Seeing its journey from raw material to finished chemical has given us a unique perspective on both its practical value and the demands of the industries depending on it. This compound, often favored in fine synthesis and pigment intermediates, stands out for its clear reactivity and stable properties.
Quality in specialty chemicals begins with the way we source and handle the incoming precursors. For 1-(3'-Chlorophenyl)-3-Methyl-5-Pyrazolone, we select every batch of 3-chlorobenzoyl chloride and dimethylformamide with attention to purity. Control over the condensation and cyclization steps plays a direct role in the consistency of each output batch.
Our process engineers monitor pH, temperature, and solvent removal closely, not only because these parameters drive yield, but also because slight variations can introduce color or stability differences that become problems further downstream. Through all the digital automation in the plant, experienced technicians still trust their senses—the odor during the reaction, the density during filtration, the way the solution runs through separation. There is a reality in chemical manufacturing that can’t be substituted by automated systems alone.
By keeping production in-house rather than relying on toll manufacturers or contract partners, we remain in control of every step. This hands-on approach – following a product from raw input to isolated pyrazolone – lets us ensure customers receive every batch with trustworthy documentation, traceability, and clear lineage.
Our primary production model for 1-(3'-Chlorophenyl)-3-Methyl-5-Pyrazolone targets a purity of at least 99%, typically verified by HPLC, and water content below 0.3% as determined by Karl Fischer titration. The physical appearance shows as an off-white to faint yellow crystalline powder, characteristic of this molecule’s stable ring structure. In our experience, paying attention to color and free-flowing nature during finishing and packaging proves as important as analytical purity, since end uses often require consistent handling in automated dispensing systems.
Detailed analytical controls, including IR spectra and NMR, let us catch potential impurities such as regioisomers or residual reactants, ensuring downstream reactions proceed smoothly for customers engaged in synthesis.
Users frequently demand 1-(3'-Chlorophenyl)-3-Methyl-5-Pyrazolone as a central intermediate in synthetic dye and pigment manufacture, as well as in certain active pharmaceutical ingredient syntheses. In pigment production, the pyrazolone ring imparts both stability and vivid color hues, especially for yellow and orange tones that resist photobleaching.
In our plant’s history, we have seen growing demand from developers of high-performance dyes for technical textiles, plastics, and coating resins. These applications require clean, consistent batches with low byproducts, since downstream formulation often tolerates little deviation. Our facility structure, designed for multi-purpose batch reactors, allows us to flexibly schedule runs and avoid contamination from neighboring lines.
Beyond colorants, medicinal chemistry labs rely on this compound as a scaffold for further derivatization, capitalizing on its reactivity at both the pyrazolone nitrogen and the aromatic ring. We often receive direct feedback from research customers seeking enhanced solubility or purity beyond generic grades, which has driven us to refine processes in favor of lower residual solvents and improved sieve drying to avoid moisture effects.
Being the original manufacturer gives us a toolkit for differentiation that trading companies lack. Our clients do not just come for the molecule—they come for the reassurance that what arrives at their facility matches what was promised, with no hidden batch variability. Characteristics such as the absence of certain by-products, tight melt point, and a specific crystal habit can affect downstream equipment or analytical methods, so we maintain logs of even minor deviations and adjust process tuning as needed.
Customers occasionally inquire about alternative grades: technical for bulk dye production, and high-purity for pharmaceutical research. We supply both, but our experience shows that even the largest buyers often prefer tighter controls, because mistakes in downstream synthesis can cascade into wasted time and unusable product. Many confide in us about difficulties with material sourced from fragmented supply chains—off-spec batches that wreak havoc on process yields or require yet another purification step. The consistent supply, uninterrupted by shifting intermediaries, builds trust.
Pricing sometimes leads to hard conversations. We have seen market entrants offer surface-low prices by cutting corners—mixing in non-conforming material, failing to dry batches properly, or inflating packing list weights. This creates headaches for users, from unanticipated cleaning cycles to outright production stoppages. Our commitment stays fixed: deliver verified, QA-tested material with open documentation, even in volatile cost environments.
Across the sector, one persistent challenge involves residual solvents and micro-impurities. Even trace levels can interact undesirably in some dye formulations or pharmaceutical syntheses. To tackle this, our team spends significant effort optimizing solvent switches and performing staged crystallizations to reduce occluded impurities. These process improvements are not merely incremental—they directly impact customers’ ability to obtain reliable results in production.
Batch-to-batch reactivity variation poses another concern. Our on-site QC lab checks for parameters that matter in downstream reactions, such as melting point variation and residual moisture. In pigment syntheses, even minor impurity levels can cause hue drift or loss of lightfastness—a problem that only scrutiny at the manufacturing stage can head off. Customers depending on scale-up production lines need assurance that the properties of every ton remain the same as the previous order. By maintaining archives of production data, we help customers trace any irregularity to its root, supporting them through troubleshooting and formulation optimization.
Waste management and regulatory compliance cannot be overlooked. We designed our reactors and effluent treatment to minimize environmental impact, keeping waste streams separated for easier post-processing. Changing global regulations, especially for products ending up in textiles or drug precursors, demand constant attention to new purity and documentation standards. Investments in closed-loop processing and on-site analytics keep us ready for evolving requirements, ensuring our product never faces downstream compliance issues or causes disruption for end users.
Many clients come to us not just for shipments, but for a relationship where technical problems in the field can be discussed openly. Over the years, we have supported projects involving new pigment shades, alternative synthetic routes, and scaled batch trials. Occasionally, customers uncover an unexpected interaction or need assistance scaling up a lab recipe. Our in-house R&D staff work with them, sharing samples, discussing minor process tweaks, or advising on purification strategies for their follow-on chemistry.
We recognize the reality of modern manufacturing: time lost to an off-spec batch can never be recovered. For customers trialing new product lines or dealing with strict regulatory reviews, having the direct manufacturer as a troubleshooting partner becomes a significant advantage. Open channels support both sides. Our teams offer insight into process adaptations, while their plant technicians give real-time feedback on performance outcomes.
Occasionally, the real world forces last-minute changes—urgent needs for extra stock, sudden specification shifts, or the discovery that a formulation reacts differently than lab data predicted. Our flexible production planning allows us to prioritize these needs, adjust purification protocols, or expedite sampling, all supported by on-site analytics to avoid relying on remote laboratories. In each of these situations, our role as both manufacturer and advisor gives us a stake in our customers’ outcomes.
In our chemical manufacturing plant, continuous improvement stems as much from customer conversations as from internal research. New technology—whether more efficient solvent recovery, advanced filtration, or tighter process control—enters the facility because customer demand persists for better and more reliable results. We track feedback from every market served, running pilot tests and updating cleaning protocols or analytical metrics as needs shift.
Sometimes, an industry trend triggers a shift in specification. Tightened regulations on residual halides, reduced tolerance for fine particulates, or the push for greener solvents have all caused us to examine batch records, rework pipeline connections, or bring in new testing routines. Every improvement, whether responding to global trends or direct customer feedback, raises the baseline for everyone in the sector. Competitive pressures exist, but improvements born of cooperation with users give enduring gains.
Years of working hands-on with 1-(3'-Chlorophenyl)-3-Methyl-5-Pyrazolone have shown us that chemical production does not stand still. Even seemingly settled processes can yield better results through material and workflow upgrades. In one instance, a new crystallization technique, learned through industry exchange, trimmed process time and improved bulk product shelf life for our customers. Enthusiasm for technical progress defines those willing to invest in manufacturing, rather than treat chemicals like undifferentiated commodity cargo.
For buyers and researchers, direct access to a manufacturer who controls synthesis and understands downstream impact provides more than just a source of material. It provides insurance against unexpected process failures and a sounding board for technical planning. As the world’s demand for specialized chemicals such as 1-(3'-Chlorophenyl)-3-Methyl-5-Pyrazolone grows, companies and researchers linking up with the direct manufacturer gain not just from product access, but also from collaborative technical insight.
Our experience underscores a simple reality: a stable, high-quality supply of critical intermediates forms the backbone of successful production lines and research pipelines. While trading companies and brokers inject price competition into the market, only the manufacturer stands ready to tweak processes, answer technical questions with real process knowledge, and respond when the unexpected happens.
The difference in product consistency and technical support grows clear with time. Customers who have wrestled with irregular supplies, out-of-spec material, or untraceable batches know the disruption it can introduce. By focusing on direct production, open communication, and process refinement, we deliver not just a chemical, but the reassurance and partnership that allow end users to focus on what they do best: driving innovation and bringing products to market.
Across industries, 1-(3'-Chlorophenyl)-3-Methyl-5-Pyrazolone demonstrates the value of careful manufacturing, honest technical exchange, and sustained investment in process quality. Our aim stays fixed—not as a speculative intermediary, but as a reliable manufacturing partner committed to the needs and standards of those who depend on this essential compound.