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3-Chloropropyl Isocyanate

    • Product Name 3-Chloropropyl Isocyanate
    • Alias Isocyanic Acid, 3-Chloropropyl Ester
    • Einecs 221-209-7
    • 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

    637938

    Cas Number 4437-85-8
    Molecular Formula C4H6ClNO
    Molecular Weight 119.55
    Appearance Colorless to light yellow liquid
    Boiling Point 148°C
    Density 1.18 g/cm3 at 25°C
    Flash Point 58°C
    Refractive Index 1.453 (20°C)
    Solubility In Water Reacts with water
    Melting Point -41°C
    Purity Typically ≥98%
    Odor Pungent

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

    Packing & Storage
    Packing A 500 mL amber glass bottle, sealed with a Teflon-lined cap, labeled "3-Chloropropyl Isocyanate," with hazard warnings.
    Shipping 3-Chloropropyl Isocyanate must be shipped in tightly sealed containers, protected from moisture, heat, and incompatible substances. Classified as hazardous, it requires proper labeling and documentation in accordance with international regulations (such as UN 2489, Class 6.1, Packing Group I or II). Only trained personnel should handle and transport this chemical.
    Storage 3-Chloropropyl Isocyanate should be stored in a cool, dry, well-ventilated area, away from direct sunlight and incompatible substances such as water, alcohols, amines, acids, and bases. Store in tightly closed, clearly labeled containers made of suitable materials. Use secondary containment to avoid spills, and keep away from heat or ignition sources. Handle using appropriate chemical safety protocols and personal protective equipment.
    Application of 3-Chloropropyl Isocyanate

    Applications of 3-Chloropropyl Isocyanate in Industrial Manufacturing

    We support global manufacturing customers by supplying 3-Chloropropyl Isocyanate for use in well-established industrial sectors. As a core reactive intermediate, it enables precise modification of polymers, advanced coatings, and specialty chemicals required for downstream conversion. Below are specific applications proven in commercial practice.

    1. Synthesis of Silane-Coupling Agents for Adhesive and Sealant Formulation

    Manufacturers of advanced adhesives and sealants incorporate 3-Chloropropyl Isocyanate in the synthesis of silane-functionalized agents that improve interfacial bonding with glass, metal, and mineral fillers. The isocyanate group reacts efficiently with amino- or epoxy-silanes under controlled conditions to bridge organic polymers and inorganic substrates. Finished silane-coupling agents, produced via this route, underpin durability, elongation, and peel strength in structural and construction-grade formulations.

    Industry compliance standards

    • ISO 10993-5 for cytotoxicity in medical adhesives
    • ASTM C920 for elastomeric joint sealants
    • REACH Annex XVII and CLP Regulation (EC) No. 1272/2008
    • RoHS Directive 2011/65/EU for electronics-related adhesives

    Typical usage ratio

    • 0.5–2.5 wt% of 3-Chloropropyl Isocyanate, adjusted based on the targeted silane agent functionality and total desired silane concentration in final formulation

    Downstream process integration

    • Charged to the silanization reactor stage, after pre-drying, often following a catalyst or base-initiation step; reacts under inert atmosphere at 60–90°C with key aminosilane or epoxysilane intermediates; strict monitoring for full isocyanate conversion

    Final product types

    • Silane-coupling agents (for silicone, polyurethane, epoxy adhesives)
    • Structural elastomeric sealants
    • Glass-to-metal bonding primers
    • Hybrid construction adhesives

    2. Crosslinking Additive for Specialty Polyurethane Elastomers

    Producers of custom polyurethane elastomers select 3-Chloropropyl Isocyanate as a specialty crosslinker to introduce chlorinated pendant groups. These modifications enable tuning of solvent resistance, compressive strength, and adhesion to halide-rich substrates in automotive, mining, and oil & gas pipeline coatings. The compound reacts with active polyols during prepolymer synthesis or post-polymerization functionalization, leading to mechanical and chemical property enhancement at the chain-extension phase.

    Industry compliance standards

    • ISO 9001:2015 for quality management in elastomer manufacturing
    • ASTM D412 for tensile properties of vulcanized rubber and thermoplastic elastomers
    • REACH authorization for use of isocyanates in polyurethane production
    • EPA TSCA regulations for industrial polymer additives

    Typical usage ratio

    • 0.3–1.2 mole percent relative to total isocyanate groups, with the final amount set by target crosslink density and application-specific solvent resistance requirements

    Downstream process integration

    • Introduced at the crosslinking or chain-extension stage, post-prepolymerization; dissolved in compatible solvent prior to addition to homogenize with polyester or polyether polyols; followed by curing under strictly monitored temperature (60–120°C)

    Final product types

    • Chemical-resistant polyurethane elastomer sheets
    • Pipelining inner coatings
    • Automotive vibration damping pads
    • Mining conveyor belts

    3. Precursor for Functionalized Pharmaceutical Intermediates

    Chemical synthesis plants employ 3-Chloropropyl Isocyanate to introduce reactive chloroalkyl and isocyanate moieties during the production of certain pharmaceutical intermediates. Its incorporation facilitates targeted urea, carbamate, or substituted amide synthesis via regioselective reactions with amine or alcohol-bearing active pharmaceutical ingredient (API) cores. The resulting intermediates enable access to a range of specialty molecules, including kinase inhibitors, rheumatoid arthritis therapies, and experimental oncology candidates.

    Industry compliance standards

    • ICH Q7 Good Manufacturing Practice for Active Pharmaceutical Ingredients
    • European Pharmacopoeia (Ph. Eur.) and United States Pharmacopeia (USP)
    • FDA 21 CFR Part 211 for cGMP Finished Pharmaceuticals
    • REACH and GHS labeling compliance for pharmaceutical raw materials

    Typical usage ratio

    • 0.8–1.1 molar equivalents relative to the nucleophile (amine or alcohol) group of the intermediate; precise ratio verified by HPLC yield monitoring for each synthesis batch

    Downstream process integration

    • Fed to the reaction vessel following deprotection of API core, in anhydrous solvent; coupled by slow addition at controlled temperature (0–25°C); in-process control to verify complete conversion and limit residual isocyanate

    Final product types

    • Functionalized urea-based kinase inhibitor intermediates
    • Chloropropyl-substituted carbamates
    • Alkyl chlorides for further derivatization
    • API precursors for clinical and preclinical drug candidates

    4. Modifier for Epoxy Resin Systems in Electronic Encapsulation

    Insulation and potting compound producers apply 3-Chloropropyl Isocyanate as a reactive diluent and chain-modifier for high-performance epoxy resin blends. The chloropropyl group enhances compatibility with flame-retardants and glass fillers, while the isocyanate function reacts with pre-epoxy amines to improve matrix uniformity and reduce internal stress in solidified encapsulants for printed circuit boards (PCBs), sensors, and power modules. This approach yields finished materials with guaranteed increased thermal and electrical resistance for advanced electronics applications.

    Industry compliance standards

    • UL 94 for flammability rating of plastic materials
    • IEC 60695 for fire hazard testing in electrical insulating materials
    • IPC-4101 for base materials for rigid and multilayer PCBs
    • REACH/ROHS restrictions for electronic chemical substances

    Typical usage ratio

    • 1.0–3.0 phr (parts per hundred resin), varied based on total filler load and targeted gel time during encapsulation

    Downstream process integration

    • Added to the epoxy premix, just prior to curing agent introduction; thorough dispersion at 25–35°C to ensure even distribution; in-situ monitoring for viscosity and pre-cure exotherm

    Final product types

    • Electronic component encapsulants
    • PCB potting compounds
    • Sensor and relay casings
    • Flame-retardant electronic insulation blocks
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    Certification & Compliance
    More Introduction

    Introducing 3-Chloropropyl Isocyanate: Precision in Modern Chemical Synthesis

    Every chemist knows the challenge of finding the right building blocks for robust, predictable results. At our production site, we’ve invested years into refining the synthesis and batch purity of 3-Chloropropyl Isocyanate, recognizing its pivotal role in the hands of R&D professionals and manufacturing engineers. In daily operations, the real value of this compound emerges—the ability to couple reactivity with manageable handling, opening pathways for materials that shape industries from coatings to pharmaceuticals.

    Working with 3-Chloropropyl Isocyanate: What Sets It Apart

    Our 3-Chloropropyl Isocyanate, with a model designation recognized by experienced procurement teams, presents a clear, pale liquid at standard conditions—our batch control ensures consistent assay by gas chromatography, with low water content by Karl Fischer titration. We avoid contaminants that interfere with downstream chemistry. Time and again, customers highlight its exceptional batch-to-batch reliability.

    The heart of its utility lies in the structure: three carbons bridging a reactive isocyanate with a terminal chlorine group. Anyone familiar with alkyl isocyanates knows the extra functional handle permits tethering onto a huge variety of substrates. Chlorine activation grants straightforward introduction into nucleophilic materials, creating linkages that stay put through manufacturing stress-tests, thermal cycles, and broad solvent environments. Compared to methyl or ethyl isocyanates, chemists get a much richer field of reactivity. The longer chain imparts better flexibility, which is crucial in polymer crosslinking and surface treatments. Subtle adjustments during synthesis—temperature ramp, timing of chlorination, choice of catalysts—mean we can steer impurity profiles and capture higher purity without capping throughput.

    Every year, we’ve tracked feedback from coatings experts and adhesive manufacturers who rely on consistent kinetics during isocyanate reactions. They’ve confirmed that our approach—tight process control, filtration, and targeted stabilization—preserves functionality across tough application cycles. In urethane chemistry, 3-Chloropropyl Isocyanate often becomes the bridge between bulk polymers and functional surfaces, where short-chain analogs fall short. Our teams learned this lesson early: electron-withdrawing chlorines shift reactivity, lowering activation energies for nucleophilic addition. For surface modification work, the liquid handles easily under nitrogen, and careful packaging ensures no atmospheric moisture gets in prior to use.

    Applications Demanding High Standards

    Synthetic challenges rarely stand in a vacuum. Most industrial chemists address tight timelines, specialized performance criteria, and regulatory guidelines. 3-Chloropropyl Isocyanate lends itself well to high-value synthesis where precision matters—from pharmaceutical intermediates to functional silanes and specialty polymers. Peptide chemists turn to the product for selective NCO end-group incorporation. Material scientists value the chloropropyl group for directly attaching to silicas and glass, engineering hydrophobic surfaces that outlast classic silane coatings. Experienced formulators tell us that typical isocyanates can hydrolyze fast if not made and shipped properly; with ours, they report sharper shelf life and more predictable reactivity, helping avoid waste and failed batches.

    In practice, the industry leans on our production know-how during transitions to pilot and commercial scale. Customers involved in scale-up trust our transparency on every batch—the spectra, impurity fingerprinting, and trace moisture reporting. Our own QC team uses high-resolution mass spectrometry and NMR for routine checks, not just for regulatory reasons but to keep faith with partners who need the full story on what’s going into their process. The product ships under inert gas, using containers specifically tested for long-haul shipments internationally. Even after months in transit, end users tell us the isocyanate arrives with unchanged purity and performance.

    Comparing 3-Chloropropyl Isocyanate to Other Isocyanates

    Those new to specialty chemicals sometimes ask: Can’t we just use methyl, ethyl, or phenyl isocyanates where alkyl chlorides won’t react? The straightforward answer—from a manufacturer’s view—is that only 3-Chloropropyl Isocyanate strikes the balance between nucleophilic activation and robust bond formation. Methyl isocyanates offer speed for small molecule coupling, but lack flexibility; derivatives with shorter alkyl chains sometimes evaporate or degrade before performing in real-world conditions. On the other end, aromatic isocyanates bring bulk and rigidity, but lose out in compatibility with flexible polymers and low-temperature applications.

    Every practical user knows that the chloropropyl group’s additional functionality can’t be replicated by simple chain extension or changing the isocyanate source. These molecular details matter at the bench: Reactions tolerating secondary chemistry—especially with alkoxysilanes or epoxides—benefit from the slow, controlled reactivity of our product. Researchers synthesizing intermediates for crop protection agents or specialty elastomers get a reproducibility boost, minimizing byproduct formation and trimming downstream purification steps. When scaled to the tonnage required by industrial clients, the minimized exothermicity from the longer chain compound reduces hazards and downtime, promoting safe and streamlined operations.

    Building Reliability Through Process Control

    Decades in chemical manufacturing have made one lesson clear: Consistency beats theoretical purity in industrial practice. At our facility, every batch of 3-Chloropropyl Isocyanate passes a comprehensive QC battery, with critical steps logged in real time—GC purity, stabilizer residue levels, and low metal content. Our process uses controlled chlorination, tuned catalysts, and strict moisture exclusion techniques. Years ago, early runs spotlighted how trace water or under-reacted intermediates led to visible color changes, off-odors, or shelf stability slips. These bumps aren’t just academic—they risk whole product runs for large customers.

    We established a cross-functional task team—process engineers, QC chemists, plant supervisors—to address these points. This team keeps continuous improvement practical, favoring robust fixes over theoretical tweaks. We strengthened pretreatment and drying steps, implemented new stabilizer blends, and designed custom reactors with improved mixing at temperature plateaus. The result shows up in the field: repeat orders from partners who stake their own product lines on a stable isocyanate input. Our engineers remain available for technical support during customer trials, helping troubleshoot scale-up hiccups, reaction compatibility, or handling best practices.

    Safe Handling and Real-World Practices

    We cannot overstate the importance of sound safety culture around isocyanates. Every batch leaves our plant with up-to-date documentation—QC release results, shipping compatibility test data, and best handling practices. We learned from early customer feedback that clarity on PPE and closed transfer setups matters more than glossy data sheets. Experienced handlers at our facility wear suitable gloves, full-face respiratory protection, and use rigorously sealed transfer equipment.

    We recommend customers establish the same standards: designated isocyanate zones, air extraction systems, and routine air monitoring. 3-Chloropropyl Isocyanate features a distinct, sharp odor and evaporates readily—good ventilation, leak-proof lines, and trained staff reduce exposure risks. Our technical team supports process safety efforts, offering tailored advice learned from thousands of metric tons shipped and handled worldwide. Storage guidelines reflect what really works—sealed drums under nitrogen, shaded from light and heat, separate from acids, amines, and common nucleophiles.

    Our focus on pragmatic, reliable safety support continues every week on site. Through experience, we know even the best product can be ruined by a five-minute lapse during unloading or transfer. We work with partner companies to document handling incidents and near-misses, pooling knowledge for smarter, safer operations across the value chain. No barrier exists between our manufacturing floor and technical support—we troubleshoot with you, not just from the other side of a shipping invoice.

    Environmental Responsibility and Sustainable Practices

    The chemical world faces rising scrutiny: Regulations tighten, and every supplier faces audits on waste, emissions, water use, and lifecycle impacts. At our site, we’ve acted on several fronts. Chlorine-based process streams now flow through multiple containment and treatment steps, not just dilute scrubbing. We recover unreacted starting materials for in-house re-use or high-temperature incineration. All vent gases pass through advanced abatement setups, which keeps chlorine emissions far below national thresholds.

    We aim to cut process waste, recover solvents for distillation, and minimize offsite disposal loads. Continuous monitoring and process analytics help flag off-spec byproducts early, reducing downstream rework. Our ISO accreditation covers more than paperwork—it shows up in real investments: we back up-excursions with valid, proactive process adjustments. On the sourcing side, major feedstocks come from closed-loop suppliers with their own green certifications. We collaborate with downstream customers committed to extended producer responsibility, ensuring the lifecycle of 3-Chloropropyl Isocyanate remains accountable beyond the plant gate.

    As the world shifts toward tighter chemical regulation, we remain committed to full transparency. Inspection teams have open access to plant data, and technical visitors often accompany us through labs and maintenance bays. Investment in cleaner technologies and safer practices continues every budget cycle—a facts-first approach, shaped by audits, not just marketing brochures. We supply customers who stake their reputation on meeting strict global guidelines. In turn, every ton we deliver reflects heavy investment in traceability, safety, and minimization of environmental burden.

    Supply Security and Continuous Improvement

    Anyone at a chemical plant knows the sting of a late shipment or a sudden production halt. Over the years, we’ve built out redundancies in feedstock procurement, warehousing, and logistics routing. Multiple vetted sources supply the key intermediates and gases required at each synthesis stage. Localized warehousing smooths out peak order months, while a rotating stock in bonded storage protects against customs delays.

    Partners appreciate our advanced notice on any flow shifts, planned maintenance stops, or force majeure risk. This upfront communication lets them schedule batch runs and logistics closely with their own production cycles. We support smaller R&D teams as well as high-volume industrial buyers, recognizing that our reliability underpins their success. Every production cycle incorporates feedback from field partners—reaction reproducibility, impurity reporting trends, preferred container types, and route modifications after delivery hiccups.

    Recently, our team rolled out digital tracking for all high-priority batches. End users see real-time updates from dispatch, customs clearance, and arrival at bonded warehouse. Quality control uploads batch certificates the instant results clear, giving procurement managers peace of mind during audit season. Our value isn’t just technical; it’s built on lived experience supporting customers over decades, responding quickly to urgent shipment requests, minor order tweaks, or unanticipated volume shifts.

    Outlook: Building the Next Generation of Chemical Solutions

    Demands on specialty chemical building blocks continue to evolve. Where yesterday’s buyers wanted basic purity, today’s want full impurity trails, regulatory readiness, climate impact data, extended shelf life, and real-time shipment updates. As we look ahead, development work on 3-Chloropropyl Isocyanate continues—exploring tweaks for even longer shelf life, safer transportation classes, and tailor-fit impurity specifications for critical industries.

    We continue collaborating with universities and industrial users, gathering insights on next-generation reactions and advanced performance materials. Each year, new tech from analytical laboratories feeds directly into production—mass spectrometry, on-line moisture sensors, machine learning for batch anomaly detection. On-site engineers travel to customer facilities worldwide to document the lived experience—what works, where bottlenecks still exist, and where incremental tweaks produce disruptive improvements in quality or security of supply.

    In the world of chemical manufacturing, experience makes the difference. 3-Chloropropyl Isocyanate’s track record in demanding industries, paired with real support and unbroken supply chains, underscores the value of hands-on production expertise. Whether the need is new materials for competitive edge, or just an unyielding demand for predictability at scale, our plant and our people stand ready to support those building tomorrow’s solutions.