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5-Chloro-2-Hydroxybenzophenone

    • Product Name 5-Chloro-2-Hydroxybenzophenone
    • Alias p-Chlorosalicylphenyl ketone
    • Einecs 242-366-1
    • 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
    • CONTACT NOW
    VTB
    Specifications

    HS Code

    455183

    Iupac Name 5-chloro-2-hydroxybenzophenone
    Molecular Formula C13H9ClO2
    Molecular Weight 232.67 g/mol
    Cas Number 85-19-8
    Appearance Light yellow crystalline powder
    Melting Point 139-141°C
    Boiling Point 393°C at 760 mmHg
    Solubility Slightly soluble in water, soluble in organic solvents
    Density 1.3 g/cm³
    Purity Typically ≥98%
    Synonyms Chlororesorcinol monobenzyl ketone
    Refractive Index 1.648
    Flash Point 192.9°C

    As an accredited 5-Chloro-2-Hydroxybenzophenone factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.

    Packing & Storage
    Packing Amber glass bottle containing 100 grams of 5-Chloro-2-Hydroxybenzophenone, sealed with a screw cap and labeled with safety information.
    Shipping 5-Chloro-2-Hydroxybenzophenone is shipped in tightly sealed, chemical-resistant containers, compliant with regulatory standards for hazardous materials. Packaging ensures protection from moisture, light, and physical damage. Proper labeling with hazard information accompanies all shipments. The product is transported via approved carriers, following all local and international shipping regulations for chemicals.
    Storage 5-Chloro-2-Hydroxybenzophenone should be stored in a tightly closed container, in a cool, dry, and well-ventilated area away from direct sunlight, moisture, and incompatible substances such as strong oxidizing agents. Store at room temperature, and clearly label the container. Use appropriate personal protective equipment when handling. Ensure good laboratory practices are followed to prevent spills or contamination.
    Application of 5-Chloro-2-Hydroxybenzophenone

    Applications of 5-Chloro-2-Hydroxybenzophenone in Industrial Manufacturing

    As a direct manufacturer, we supply 5-Chloro-2-Hydroxybenzophenone primarily to industries where demanding technical requirements on UV absorption, photo-stabilization, and product shelf-life are critical. Below are established downstream application environments where our material is specified as an ingredient, with practical details for formulation, production, and compliance identification.

    1. UV Stabilizers for Engineering Plastics

    5-Chloro-2-Hydroxybenzophenone functions as a highly effective ultraviolet (UV) absorber in the compounding of engineering plastics such as polycarbonate, polystyrene, and ABS. Plastics processors add this material to protect polymer structures from degradation and color fading during extended outdoor or high-intensity indoor exposure. The additive enters the resin blending step before extrusion or injection molding, directly affecting the UV resistance, mechanical integrity, and product lifespan demanded by high-performance applications, such as automotive interiors, outdoor electrical housings, and sports equipment.

    Industry compliance standards

    • ISO 4892 (Plastics—Methods of exposure to laboratory light sources)
    • UL 746C (Polymeric Materials—Use in Electrical Equipment Evaluations)
    • RoHS Directive 2011/65/EU regarding additive acceptability
    • REACH Regulation (EC) No 1907/2006 for SVHC assessment

    Typical usage ratio

    • 0.1–0.5% by weight of polymer; adjust upwards for extended outdoor durability requirements or heavily pigmented formulations

    Downstream process integration

    • Dosed as a masterbatch during resin blending; homogenized in melt phase prior to extrusion, molding, or film blowing

    Final product types

    • Injection-molded automotive bezels and dashboards
    • Polycarbonate optical sheets
    • Outdoor electrical enclosures
    • Sports and playground equipment

    2. UV Protective Coatings for Wood and Furniture Finishes

    Industrial wood finish manufacturers choose 5-Chloro-2-Hydroxybenzophenone as a key UV screening agent to extend the gloss retention and color stability of high-end wood coatings. In these waterborne and solventborne urethane or acrylic varnish systems, it is incorporated to prevent chemical breakdown and maintain finish clarity under sunlight or artificial lighting. Coating producers must refine the additive level carefully for compatibility with resins and to maintain transparency in clearcoat applications.

    Industry compliance standards

    • EN 927-6 (Paints and varnishes—Exposure of coatings to artificial weathering)
    • US EPA 40 CFR 59 (VOC content for architectural coatings)
    • BS EN 71-3 (Migration of certain elements—relevant for toys and children’s furniture)
    • REACH Annex XVII (restrictions on use of additives in coatings)

    Typical usage ratio

    • 0.2–1.0% by weight in formulated coatings; dosage governed by film thickness, type of wood, resin system, and desired protection period

    Downstream process integration

    • Blended into the liquid coating premix, then dispersed by high-shear mixing prior to filtration and packaging; applied in spray or roller lines during wood finishing

    Final product types

    • High-gloss acrylic clearcoats for furniture
    • Polyurethane topcoats for parquet and hardwood floors
    • Outdoor wood deck sealers
    • Cabinet and decorative panel finishes

    3. Photostabilizers for Synthetic Leather and Vinyl Products

    Producers of synthetic leathers and vinyl films incorporate 5-Chloro-2-Hydroxybenzophenone to suppress yellowing, embrittlement, and surface cracking caused by photo-oxidation. This additive is exceptionally suited for flexible PVC and PU formulations, including automotive trims, upholstery, and fashion accessories. Compounding requires precise dosing to align with pigment loads and plasticizer types, making the selection of UV absorber grade critical for product warranty and compliance with consumer safety standards.

    Industry compliance standards

    • ISO 4892-2 (Plastics—Artificial weathering test methods)
    • GB/T 8945 (Synthetic leather—Physical and chemical property requirements)
    • CEN/TR 15351 (Parameters for assessment of fitness for use)
    • REACH SVHC and phthalate-free certifications for sensitive markets

    Typical usage ratio

    • 0.2–0.7% by weight, with real-world adjustment for film thickness, targeted UV transmittance, and type of plasticizer employed

    Downstream process integration

    • Introduced in the compounding phase of PVC or PU masterbatch; dissolved thoroughly prior to calendering, coating, or foam expansion steps

    Final product types

    • Automotive seat covers and interior panels
    • Faux leather handbags and footwear linings
    • Marine-grade vinyl upholstery
    • Commercial wall coverings

    4. UV Filter in Personal Care Packaging Materials

    Manufacturers of cosmetic and pharmaceutical packaging utilize 5-Chloro-2-Hydroxybenzophenone in transparent PET and HDPE containers to shield sensitive formulations from UV-induced degradation. The stabilizer enters the packaging resin compounding process, tailored for shelf-life extension of light-sensitive lotions, creams, and liquid pharmaceuticals. Regulatory focus remains on minimizing migration into contents, with strict adherence to packaging material safety and extractables standards.

    Industry compliance standards

    • EU Regulation (EC) No 10/2011 on plastic materials for food and pharma contact
    • USP <661.1> (Plastic Packaging Systems and Their Materials of Construction)
    • FDA 21 CFR 177.1630 (Polyethylene terephthalate polymers, indirect food additives)
    • ISO 10993-18 (Biological evaluation of medical devices—chemical characterization)

    Typical usage ratio

    • 0.05–0.3% by weight, with variance based on container wall thickness, pigment loading, and level of UV protection required by product formulation

    Downstream process integration

    • Metered as part of the solid additive blend before PET or HDPE resin pelletization; uniform distribution achieved before injection blow molding

    Final product types

    • Shampoo and lotion bottles
    • Transparent vials and droppers for dermatological products
    • Light-stable cream jars
    • Pharmaceutical liquid bottles

    5. UV-Protective Additive in Industrial Adhesives and Sealants

    The specialty adhesive sector formulates outdoor-use and clear-bond adhesives with 5-Chloro-2-Hydroxybenzophenone to mitigate loss of adhesion strength and discoloration under UV exposure. The material disperses into epoxy, acrylic, and polyurethane adhesive systems used for glass lamination, construction sealants, and high-performance mounting tapes. Careful balancing of additive content aims to preserve clarity and ensure no adverse effect on cure kinetics or mechanical properties during structural bonding.

    Industry compliance standards

    • ISO 4582 (Plastics—Determination of changes in color and variations in properties after exposure to light)
    • ASTM D1002 (Lap shear strength test for adhesives)
    • EN 204 (Classification of thermoplastic wood adhesives for non-structural applications)
    • REACH Annex XVII restriction on hazardous additives

    Typical usage ratio

    • 0.1–0.6% by weight within the adhesive premix; actual amount influenced by adhesive base chemistry and target UV durability testing cycles

    Downstream process integration

    • Introduced during the batch formulation, typically after resin and plasticizer addition, with thorough dispersion prior to final filtration, packaging, and end-use application

    Final product types

    • Clear glass-bonding adhesives
    • Outdoor construction sealants
    • Double-sided barrier tapes
    • Automotive windshield adhesives
    Free Quote

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    Certification & Compliance
    More Introduction

    5-Chloro-2-Hydroxybenzophenone: Reliable Chemistry from the Production Floor

    Understanding the Value of 5-Chloro-2-Hydroxybenzophenone

    Every batch of 5-Chloro-2-Hydroxybenzophenone that leaves our reactors brings with it a history rooted in deep chemical manufacturing know-how. This compound caught our attention decades ago because its unique structure—melding a chlorinated aromatic ring with a hydroxyl group—allows it to deliver more than typical benzophenones. In production, the compound consistently meets the purity standards essential for downstream applications. We’ve learned over years of manufacturing that this isn’t the kind of product you see on shelves or in simple day-to-day goods, but one vital for industries that rely on precise, stable intermediates.

    Model and Specifications: Direct from Reactor to Real-World Application

    On our production lines, 5-Chloro-2-Hydroxybenzophenone, often referenced by chemists as “Model 1164” for clarity, is produced using strictly regulated batch processes. The focus is on repeatable quality. Chemically, it has a molecular formula of C13H9ClO2 and a molecular weight of 232.67. We put every batch through rigorous HPLC and GC quality checks to ensure low impurity profiles. Moisture content and melting range don’t get overlooked either—our team monitors these metrics closely, as even small variations can throw off reactions downstream.

    Physical handling matters too. We see 5-Chloro-2-Hydroxybenzophenone distributed as a white to light-yellow powder. We keep dust control and safe packaging in mind because the compound can become somewhat staticky—nobody wants spilled powder in a chemical plant. We’ve upgraded our filters multiple times so customers get a flowable product that won’t clump during transfer or long-term storage.

    From Our Plant to Industrial End Use

    This compound has earned its reputation in the plastics and coatings industry, especially for UV stability. One of the earliest commercial uses we supported involved integrating this compound into polymer systems used outdoors, where product lifespan means real money on the line. 5-Chloro-2-Hydroxybenzophenone absorbs harmful ultraviolet light efficiently, reducing the rate at which polymers degrade. Paints and adhesives benefit from the same property. Over the years, we’ve collaborated with research and development teams at several large manufacturers who are increasingly up against stricter environmental guidelines on product durability. The regulatory landscape changes every year, and this chemical has helped formulators stay ahead.

    Its role isn’t limited to plastics and coatings. Over the past decade, we’ve seen incremental growth in demand from the specialty chemicals sector—particularly in the synthesis of complex molecules where the chlorinated benzophenone structure acts as an intermediate. Fine chemical companies rely on defined melting points and high purity, which is why our QC analysts don’t get a pass on subpar lots. Miss the standards once, and the phone calls start: something doesn’t crystallize right, an NMR looks off, or the end-product yield tanks. Maintaining this level of consistency is no small feat; it only comes out of collaborative efforts across production, quality, and logistics.

    Comparing 5-Chloro-2-Hydroxybenzophenone to Other Benzophenones

    Manufacturing teaches humility about product differences. People ask how this compound sets itself apart. It’s true—on the molecular level, benzophenones all look somewhat similar. What we’ve found is that adding a chlorine at the five position changes reactivity and solubility characteristics meaningfully. For instance, some benzophenones lack the chlorinated functionality and won’t provide the same UV absorption spectrum. In head-to-head testing inside our lab, 5-Chloro-2-Hydroxybenzophenone often goes the distance under strong UV loads, outperforming mono-chlorinated or para-hydroxy alternatives when added to plastics or coatings. This difference shows up not just in accelerated weathering trials, but in real-life applications: outdoor furniture, transparent films, automotive parts. Products hold color longer and resist brittleness.

    We have put in the work to compare dissolution rates as well. Some similar products require solvent blends or struggle to dissolve under normal process temperatures. Our product dissolves in a set of common solvents, including chloroform and methanol. This has been a deciding point for OEMs who want easy integration into film or resin matrices, and who absolutely want to avoid reformulation costs.

    We also hear from process engineers who hit bottlenecks because of contaminant buildup or inconsistent granulation in alternative benzophenones. Substituting with ours has meant fewer filter changes on production lines and less loss during blending. These things may sound minor in a meeting room, but on a plant floor, less down-time and less material stuck in reactors add up to clear financial wins.

    Product Quality Built on Decades of Chemical Engineering

    A consistent product doesn’t just show up out of thin air. Heat transfer, solvent selection, agitation speed—they all influence yield and impurity profile. We have dialed in these variables through pilot and commercial-scale campaigns until repeatability is second nature. Raw material sourcing matters, too. We’ve learned the hard way that off-spec chlorobenzene or phenol can throw off the whole run. There’s a team here dedicated to auditing upstream suppliers and running incoming checks. Our operators have seen every way a reaction can drift. Their experience means issues get spotted before they move downstream.

    We keep records on every lot—sometimes to meet regulatory needs, but mostly so we can look back and solve problems before they become headaches. Sometimes our customers come to tour the plant. They’re surprised to see old paper notebooks sitting next to digital tracking screens. Years of trial and error don’t fit cleanly into a spreadsheet. But what this approach delivers is a product that keeps its promise every single drum, every single sack.

    Addressing Evolving Needs in Plastics and Specialty Chemicals

    Market needs keep changing. UV resistance requirements keep ticking up as customers ask for lighter, clearer, or slimmer plastic parts without giving up on life expectancy. Regulations on chemical residues become more stringent every year. We’ve responded by tightening downstream purification and investing in more sensitive analytics than many industry peers. We routinely field samples for European and North American customers who have to certify compliance against SVHC lists and other regional restrictions.

    Specialty applications draw on the same product strengths. Fine chemical customers increasingly need low residue and narrow melting point ranges for synthesis steps. If a run veers off-spec, downstream efficiency takes a hit, pricing escalates, and timelines slip. Feedback from these users has directly shaped our internal protocols, leading us to review and update things as basic as filter mesh sizing and residual solvent tolerances.

    Sometimes new applications surface organically. Customers test the compound in coatings for electronics, or as an intermediate for more advanced pharmaceutical precursors. Not every trial pans out, but our technical support team keeps lines of communication open. Where others ship and forget, we stick with requests through testing and scale-up. Unplanned problems can come up—batch-to-batch color slightness, dispersibility, or even odor traces. Addressing these involved more than adjusting chemical processes; they pushed us to rethink some of our auxiliary processes and storage methods.

    Challenges and Solutions in Manufacturing Scale-Up

    On the shop floor, scaling from lab to commercial-sized vessels doesn’t always go by the book. Heat removal, agitation uniformity, and solvent recovery can trip even experienced staff. Our team has overhauled condensing systems and meter-by-meter reactor baffles to tame runaway exotherms and uneven precipitations. Material balances on solvent washes get checked to make sure nothing critical gets left behind.

    Reducing waste has been a steady focus. Early runs produced higher byproducts, requiring more reprocessing. We invested in in-line detectors and improved our crystallization protocols, which reduced solvent use and cut down the need for lengthy post-purification. This not only delivers a greener process, but also shaves off operating costs. Efforts to reclaim and recycle by-product streams now feed into other product lines, extending what’s achieved from a single manufacturing line.

    Not every problem is technical. Storage and shipment logistics present their own hurdles: hygroscopicity, caking, and static generation threaten to degrade product before it reaches a customer’s plant. Years ago, we added seamless linings and moisture barrier inner bags after a few complaints reached our quality hotline. Coordinating with logistics partners ensures temperature variations don’t affect the product in transit, especially during humid seasons.

    Training, Culture, and Safety on the Plant Floor

    Making a compound with this level of consistency calls for more than written procedures—it takes a culture of accountability. Our crews undergo cross-training and regular refresher sessions, not just on equipment, but on handling, sampling, cleanout, and emergency protocols. Many of our operators have worked on these lines for a decade or longer. They catch subtle shifts—smell, color, powder flow—that flag issues before machines or lab analyses do. Lessons from incidents, even minor ones, get shared in safety huddles.

    With chlorinated aromatics, attention to personal and environmental safety is non-negotiable. Our engineering staff built multi-stage scrubbing into vent lines for off-gases and use closed transfer methods to minimize operator exposure. The goal isn’t just compliance—it stems from a respect for the people handling our products daily. Packaging is another front for safety; custom drum closures and anti-static liners now come standard to control dust and prevent spills during drum opening or charging.

    Safeguarding workers stays front and center, and keeping emissions low aligns with our community obligations. We maintain relationships with local authorities and contribute to periodic environmental impact reviews for the chemicals in our portfolio. Building trust with regulators and neighbors helps guarantee a smoother path any time we scale up or switch raw material sources.

    Keeping Pace with Regulatory and Market Demands

    Regulations influence nearly every process step. Over the past few years, new restrictions on polyaromatic and persistent chemical migration have kept us on our toes. Our teams monitor updates to registration files and ensure our compound’s residues don’t cross evolving safety thresholds. We submit samples for external verification and keep certifications updated to help customers jump through their own compliance hoops, especially those exporting to regions with differing standards. The hoops seem higher each year, but we treat it as an opportunity to stay relevant rather than a nuisance.

    Cost pressures remain a fact of life. With raw materials, utilities, and labor facing inflationary trends, maintaining product affordability is a struggle. We’ve tackled it through process optimization: streamlining batch times, cutting down solvent cycles, and incorporating more energy-efficient heating and cooling. Frequent feedback from customers about pricing guides where we fine-tune. Cutting corners in quality isn’t an option, so efficiency gains become the only way forward.

    As sustainability grows in importance, we’ve had to look at lifecycle thinking. We actively test biodegradable packaging options and analyze the full material footprint—from chemical synthesis to shipment. This isn’t marketing talk; it’s bottom-line reality as customers increasingly request transparency and lower-impact materials. Piloting in-house waste water recycling and low-emission energy sources dovetails with broader company goals and emerging regulations.

    Building for the Future with Customers in Mind

    Staying ahead means listening closely to customer needs. Application testing, small-batch customizations, and joint problem solving have long set manufacturers apart from traders or brokers. The insight we gain from collaborating with downstream partners feeds back into product quality and shapes future investments. We treat each new request or recurring complaint as a cue for what the market truly values. Sometimes, customers want reassurance about long-term supply stability. We respond with inventory planning, doubled safety stocks, and contingency raw material sources to guarantee on-time shipments—even when demand spikes or supply chains wobble.

    Research and development never sit still. Together with academic groups and consortia, we dive into performance testing, environmental fate studies, and alternate synthesis pathways. The goal is not only better specs on paper, but easier, safer use in production settings. Often, the keys to new markets start with simple tweaks—tightening a melting range, smoothing powder flow, or reducing batch odors. These changes stem from continuous technical and operational feedback, not isolated R&D. Our dedication to dialogue and flexibility translates to “real world” product success, not just lab wins.

    Real-World Impact of Manufacturing Choices

    Getting 5-Chloro-2-Hydroxybenzophenone right impacts more than just our bottom line. Customers trust that their production lines won’t grind to a halt and end-users count on finished products lasting through repeated cycles under sunlight or stress. Environmental pressures, worker safety, and shifting demands mean we can’t take short cuts. Every improvement in raw material control, emission capture, or production efficiency reflects in the reliability of the final product. Over time, these cumulative improvements compound to create long-term business value and steady customer relationships.

    We draw from years of experience that consistency, transparency, and technical support define the role of the manufacturer—not just as a supplier, but as a partner in product success. In this business, every drum tells the story of real work, real experience, and real solutions, batch after batch.