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Cyclopentyltrichlorosilane

    • Product Name Cyclopentyltrichlorosilane
    • Alias Cyclopentyltrichlorosilane
    • Einecs 205-672-4
    • 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

    300030

    Chemical Name Cyclopentyltrichlorosilane
    Molecular Formula C5H9Cl3Si
    Molecular Weight 219.57 g/mol
    Cas Number 16752-59-1
    Appearance Colorless to pale yellow liquid
    Density 1.213 g/mL at 25°C
    Boiling Point 226-227°C
    Melting Point -70°C (approximate)
    Refractive Index n20/D 1.481
    Purity Typically ≥97%
    Solubility Reacts with water
    Flash Point 90°C (closed cup)

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

    Packing & Storage
    Packing Cyclopentyltrichlorosilane is supplied in a 100 mL amber glass bottle, sealed with a PTFE-lined cap, and labeled for safe handling.
    Shipping Cyclopentyltrichlorosilane is shipped in tightly sealed containers under an inert atmosphere, protected from moisture and air. It must be packed in accordance with hazardous materials regulations, typically in corrosion-resistant drums, with clear labeling. Transport requires proper documentation and handling by trained personnel, due to its flammability and reactivity with water.
    Storage Cyclopentyltrichlorosilane should be stored in a tightly sealed container under dry, inert conditions, such as in a desiccator or glove box, away from moisture, air, and incompatible substances like oxidizers and alcohols. Store in a cool, well-ventilated area, and protect from direct sunlight. Proper labeling and secondary containment are recommended to prevent leaks and accidental exposure.
    Application of Cyclopentyltrichlorosilane

    Applications of Cyclopentyltrichlorosilane in Industrial Manufacturing

    Cyclopentyltrichlorosilane serves as a specialty organosilicon intermediate in multiple industrial sectors. Its unique structure makes it valuable for controlled silylation, hydrophobic modification, and as a functional silane precursor in both organic and inorganic product lines. We apply our manufacturing expertise to support strict downstream production requirements.

    1. Silylating Agent in Pharmaceutical Synthesis

    Pharmaceutical manufacturers utilize cyclopentyltrichlorosilane to introduce cyclopentylsilyl protecting groups in API production—particularly for sensitive alcohol and amine functionalities in complex molecules. The compound acts as a selective silylating agent under anhydrous conditions, with process parameters tightly controlled to ensure high yield and reproducibility. It takes part in key intermediate steps during multi-stage active ingredient synthesis for regulated drug substances.

    Industry compliance standards

    • ICH Q7 Good Manufacturing Practice Guidelines for API production
    • EU GMP Part II, Section 19 (APIs used in medical synthesis)
    • U.S. FDA 21 CFR Part 211 (Current Good Manufacturing Practice for Finished Pharmaceuticals)
    • USP-NF monographs for related drug substances and intermediates

    Typical usage ratio

    • 0.8–1.2 molar equivalents relative to the target hydroxyl or amine function; adjustment is based on substrate reactivity and downstream hydrolysis conditions

    Downstream process integration

    • Added during silylation steps in reactor under strictly controlled anhydrous conditions; followed by quenching and purification

    Final product types

    • Protected pharmaceutical intermediates
    • Active pharmaceutical ingredients (APIs) requiring specific protection group chemistry
    • Peptide-based therapeutics
    • Small molecule drug substances

    2. Surface Treatment of Electronic-Grade Glass and Ceramics

    Manufacturers of display panels, semiconductors, and optical devices use this raw material to functionalize glass and ceramic substrates. The trichlorosilane group reacts with surface silanol groups, enabling the grafting of cyclopentyl-modified silane layers. This process enhances hydrophobicity, chemical resistance, and compatibility with subsequent organic or metal deposition. Batch and continuous vapor phase deposition integration allow precise control in cleanroom production environments.

    Industry compliance standards

    • IPC-6012 (Qualification and Performance Specification for Rigid Printed Boards)
    • SEMI F42 (Semiconductor Equipment and Materials International Standard)
    • ISO 14644 (Cleanrooms and Associated Controlled Environments)
    • RoHS 2011/65/EU for component-level environmental regulation

    Typical usage ratio

    • 1–5% by volume in dry vapor-phase or 0.5–3% by weight in silanization baths; dosing depends on substrate area and target layer thickness

    Downstream process integration

    • Introduced during substrate pre-treatment before further deposition or assembly; post-silanization baking secures surface attachment

    Final product types

    • Semiconductor wafers with modified dielectric layers
    • Cover glass for mobile and optical devices
    • Ceramic insulators for electronic assemblies
    • Photomask blanks with anti-fouling surface

    3. Precursor for Silicone Resin Manufacturing

    In the advanced material sector, cyclopentyltrichlorosilane functions as a co-monomer for specialty silicone resins with tailored thermal and mechanical profiles. Resin manufacturers hydrolyze and co-condense it with other chlorosilanes or alkoxysilanes, adjusting the cyclopentyl content for crosslink density and flexibility. The resulting siloxane networks find use in electronics encapsulation, coatings, and adhesion-critical composite materials where hydrophobicity and environmental resistance are required.

    Industry compliance standards

    • ISO 9001:2015 Quality Management Systems
    • UL 94 (Standard for Tests for Flammability of Plastic Materials for Parts in Devices and Appliances)
    • REACH Regulation (EC) No 1907/2006 compliance for chemical registration and safety
    • IEC 61249 (Material requirements for printed wiring boards and other interconnecting structures)

    Typical usage ratio

    • 5–30 mol% in siloxane monomer mixtures for custom resin synthesis; proportion determined by target mechanical strength and hydrophobic properties of final resin

    Downstream process integration

    • Fed during hydrolysis and polycondensation stages in closed reactor systems; post-reaction neutralization and solvent exchange follow

    Final product types

    • Thermoset silicone encapsulants
    • Protective silicone-based coatings
    • Composite laminates for flexible circuits
    • Siloxane-modified adhesives and potting compounds

    4. Hydrophobic Modifier for Technical Textile Finishing

    Technical textile finishers employ cyclopentyltrichlorosilane to impart durable water and oil repellency on synthetic and blended fabric substrates. The compound reacts at the fiber surface, forming covalently bonded silane layers. This process preserves permeability to air while creating a barrier to liquids, supporting technical garment, filter fabric, and industrial protection textiles manufacturers. Application takes place in closed finishing units for VOC emission control.

    Industry compliance standards

    • OEKO-TEX® Standard 100 for restricted substances
    • ISO 4920:2012 (Textiles — Determination of resistance to surface wetting)
    • ZDHC Manufacturing Restricted Substances List (MRSL) for textile chemical management
    • EU REACH SVHC (Substances of Very High Concern) compliance

    Typical usage ratio

    • 0.3–1.5% by weight based on dry fiber mass; dosage is optimized for finish durability after multiple washing cycles

    Downstream process integration

    • Applied during final textile finishing stage through padding or spray systems; curing follows at controlled temperature to activate silane bonding

    Final product types

    • Water-repellent technical apparel
    • Filter media with oleophobic treatment
    • Protective industrial fabrics
    • Outdoor sports textiles

    5. Coupling Agent for Advanced Composite Materials

    Composite manufacturers apply cyclopentyltrichlorosilane as a silane coupling agent to improve adhesion between polymer matrices and mineral or glass fillers. The compound is hydrolyzed under controlled conditions before being mixed with fillers; it bonds at the surface to increase compatibility and stress transfer. This enables production of stable, high-performance composite components used in transportation, construction, and energy sectors, with tight limits on extractables and interface stability.

    Industry compliance standards

    • ASTM D3479 (Tensile-Tensile Fatigue of Polymer Matrix Composite Materials)
    • ISO 9001:2015 for composite manufacturing process control
    • EN ISO 178:2019 (Plastics — Determination of flexural properties)
    • GL (Germanischer Lloyd) Guidelines for Wind Turbine Rotor Blades

    Typical usage ratio

    • 0.5–3.0% by weight relative to filler content; optimal loading set by filler type and surface area

    Downstream process integration

    • Introduced in filler treatment step prior to compounding with resin; excess silane removed by drying or washing

    Final product types

    • High-strength fiber reinforced plastics (FRP)
    • Composite structural profiles for automotive and aerospace
    • Wind turbine blade components
    • Chemical-resistant construction panels
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    Certification & Compliance
    More Introduction

    Cyclopentyltrichlorosilane: Manufacturing Perspective and Industrial Value

    A Closer Look at Cyclopentyltrichlorosilane

    Working as a chemical manufacturer specializing in organosilanes, I have seen first-hand the increasing interest in Cyclopentyltrichlorosilane, often referenced by its CAS number 16765-45-4. With demand growing in specialized industries, the product stands out for its unique combination of a cyclopentyl group and three reactive chlorosilane functionalities, setting it apart from straight-chain or aromatic trichlorosilanes.

    We produce Cyclopentyltrichlorosilane to rigorous internal standards. Consistency matters in this line of work. On-site, every batch starts with careful selection and verification of raw materials, always keeping residual moisture under close control. Moisture causes undesired side reactions, especially with trichlorosilanes, producing corrosive HCl and leading to lower yields or off-spec products. Constant monitoring at all stages keeps batch-to-batch purity above 98%. Through careful distillation under inert nitrogen and storage in moisture-tight, corrosion-resistant drums or vessels, the product reaches our customers with reliable performance for their processes.

    Comparing Cyclopentyltrichlorosilane with Related Compounds

    Some might question why select the cyclopentyl derivative over the more conventional methyl-, phenyl-, or vinyltrichlorosilane. From a formulation and synthesis viewpoint, Cyclopentyltrichlorosilane brings distinct benefits. It introduces steric bulk and a non-aromatic, non-linear carbon skeleton. In many downstream reactions, that structure prevents excessive crosslinking, controls reactivity, or tunes the flexibility of the resulting siloxane or silicon-based materials. Chemists looking for nuanced control over their end-product properties pay attention to that. Where methyl or vinyl groups may create more rigid or glassy networks, the cyclopentyl unit introduces flexibility, improved hydrophobicity, or even changes in refractive index.

    As a manufacturer, I notice the way this differentiates our product in high-value niches. In the silane coupling agent field, a structure like cyclopentyl resists environmental stress cracking and enhances thermal properties for specialized polymers. This isn’t always feasible with short-chain analogues, especially when the matrix demands compatibility with a hydrophobic or nonpolar environment. Additionally, Cyclopentyltrichlorosilane plays a role in preparing functionalized silicones with tailored responses to oil, solvents, or biological media.

    Usage Patterns Across Industries

    Cyclopentyltrichlorosilane rarely spends much time on the shelf. Clients in the polymer, coating, sealant, and specialty material industries request it in discrete quantities, ranging from a few kilograms for pilot runs to multi-ton lots for steady manufacturing. The product finds its way into synthesis routes where an organosilane serves as a bridge between organic chemistry and silicon technology. It often acts as a building block in the production of bespoke silicone elastomers, advanced intermediates, and crosslinking agents in high-performance rubbers.

    Some research institutes and electronic material companies turn to Cyclopentyltrichlorosilane for surface modification or for introducing functional groups that respond to heat, light, or pH. In technical glass fabrication, the compound enables the grafting of hydrophobic layers onto silica or glass fibers. This helps repel water, resists contamination, and extends the operational life of the final component. For the semiconductor industry, which expects contamination-free processing at all times, our facilities dedicate special lines to reduce metallic and ionic impurities in the final bottled product.

    In coatings development, Cyclopentyltrichlorosilane acts as a precursor for siloxane networks used in anti-graffiti, anti-corrosive, and moisture-barrier applications. Our long-term partners routinely share feedback showing reduced coating failure and degradation when moving away from linear or aromatic trichlorosilanes toward cyclical compounds like cyclopentyltrichlorosilane. These firsthand field experiences drive real interest in the product.

    Insights from Manufacturing: Production and Safety Challenges

    Having scaled up production several times, I know the pitfalls hidden in each process stage. Trichlorosilanes, cyclopentyltrichlorosilane included, demand respect on the shop floor. Direct contact with moisture leads to violent reactions, producing both hydrochloric acid gas and heat. Spills or accidental mixing with incompatible reagents require immediate, experienced attention to avoid escalation. In our plant, automated transfer and closed-loop systems reduce any chance of a stray droplet finding a water source.

    Expert operators monitor every reactor through remote sensors and vigilant checks. Almost all equipment exposed to the process streams comes from high-grade stainless steel or glass-lined reactors to prevent corrosion and contamination. After every campaign, maintenance teams thoroughly inspect valves, seals, and joints. Trichlorosilanes can penetrate the smallest crevices and corrode alloys that might seem suitable on paper, a lesson that only real experience teaches. Chemical safety data and shelf-life considerations matter: we keep the product in climate-controlled storage and, for larger customers, advise secondary containment and ventilation, especially where humidity spikes.

    From a regulatory perspective, Cyclopentyltrichlorosilane falls under the umbrella of hazardous industrial chemicals. We respect regional requirements for tracking, labeling, and storing chemicals of this nature. Training programs, both for our crew and for customers new to handling chlorosilanes, form part of our service. Trust builds over time through transparency about process changes and open technical dialogue on safety upgrades we've instituted after any close calls over the years.

    Product Quality: Analytical and Purity Guarantees

    Customers expect reproducible results, particularly in precision fields like electronics or specialty polymers. Typical analytical standards for Cyclopentyltrichlorosilane rely on GC-MS, NMR, and elemental analysis. Our in-house lab applies these methods to confirm the structure and rule out common byproducts, such as cyclopentanol derivatives or hydrolysis fragments. We go beyond minimal specification sheets: returning product for reprocessing is rare. Still, contingencies exist in case of transport incidents or long-term storage-induced degradation, with robust retesting and remediation protocols.

    Through years spent developing internal reference spectra and fingerprints for our house batch, we can detect deviations before they lead to customer complaints. In practice, a batch flagged during QC circulates internally until resolved. My team cares deeply about delivering the same tight boiling point, clean GC traces, and compliance with customer standards, shipment after shipment.

    Environmental Considerations and Responsible Practices

    production of chlorosilanes brings environmental scrutiny. Without diligent control, off-gassing of HCl, chlorinated vent streams, and liquid residues can cause trouble with local authorities and neighbors alike. Over time, we've adopted multi-layered scrubbers, acid-resistant containment systems, and closed-cycle vent condensing systems to minimize emissions. Waste streams travel through neutralization before leaving plant boundaries, and solid residues stay isolated for third-party hazardous waste disposal by licensed specialists.

    Many regulatory agencies have shifted from self-reporting toward real-time emissions tracking. As a manufacturer, I find proactive engagement with environmental oversight builds trust and lowers the risk of surprise inspections or penalties. Continuous improvement in waste minimization defines our strategy, whether by solvent recycling, exploring less chlorinated routes, or investing in new abatement technologies. Some customers, especially those exporting outside the region, require detailed environmental documentation, so we maintain a dedicated team for compliance and record-keeping.

    Market Trends: Evolving Demand and Supplier Relationships

    Cyclopentyltrichlorosilane commands attention not just for its reactivity but as a bellwether for specialty silane markets. Years ago, the product occupied a niche with only academic or small-scale consumer demand. Today, companies in advanced composites, high-end coatings, and functional resins increasingly seek out the compound as they pursue next-generation materials. Market analysis reflects steady growth, with supply chain disruptions from regulatory shifts or raw material shortages leading to measured strategic stockpiling among industrial buyers.

    Longstanding relationships with siloxane formulators give direct insight into the roadblocks they hit when attempting to swap lower-cost analogues for cyclopentyltrichlorosilane. They report failure in compatibility or mechanical properties, highlighting the need for that precise carbon backbone in their application. These direct technical exchanges drive us to tailor logistics for “just-in-time” deliveries and support smaller production runs, which big distributors typically can’t accommodate.

    As the original manufacturer, we prioritize open technical support, transparent pricing, and clarity about product lineage from synthesis through delivery. The supply picture shifts with feedstock prices, regulatory interventions, or changes in global trade, but built-in buffer stocks, secondary production schemes, and tight production planning keep supply disruptions rare.

    Opportunities and Challenges in Customization

    Customization defines the frontier of industrial silane chemistry. Customers testing new formulations come to us with specific requirements: tailored impurity profiles, precise dilution levels, and alternative solvent compatibilities. Not every request is feasible on a commercial scale. Some custom derivatizations or ultra-high purity cuts drain resources or threaten economies of scale. Yet, through direct R&D collaboration, we’ve hit breakthrough runs by jointly optimizing separation protocols, introducing new analytical benchmarks, or refining packaging approaches.

    Requests driven by research, including doping levels for semiconductors or trace metal limits for optoelectronic applications, push our technical teams to revisit synthesis and purification. Our strong culture of problem-solving, rooted in production staff and R&D scientists meeting daily, means sample requests often become the foundation for a broader strategic partnership rather than an isolated sale.

    Future Direction and Continuous Improvement

    Innovation and improvement remain essential in this business. Cyclopentyltrichlorosilane offers possibilities for cross-disciplinary material science, hybrid polymer developments, and advanced surface treatments. Manufacturers that remain open to co-developing solutions for emerging applications stay ahead of regulatory, environmental, and technical demands.

    Internal training evolves with every process improvement or technology upgrade. Suppliers presenting new packaging solutions, improved drying agents, or sensor-driven quality checks often find a welcome reception here. By sustaining direct relationships with raw material suppliers and end users, we create feedback loops that accelerate troubleshooting and adaptation. The most lasting business derives from honest appraisals of both product potential and production limits. Long-term investment in technical transparency and reliability carries more weight than undercutting competitors on price for one-off deals.

    Summary: Cyclopentyltrichlorosilane’s Role in Advanced Chemistry

    Having manufactured this compound for years, my view remains that Cyclopentyltrichlorosilane enables progress that simpler trichlorosilanes cannot match. Its cyclopentyl group unlocks flexibility, thermal resilience, and molecular compatibility for demanding formulations. The stability, well-defined reactivity, and physical characteristics of each batch start in our plant but echo through the performances of every adhesive, sealant, elastomer, or treated glass product downstream.

    Customers invest in Cyclopentyltrichlorosilane not to chase a short-term trend but to solve persistent technical problems: cracking in polymers, moisture susceptibility in surfaces, compatibility gaps between organic and silicon chemistries. Meeting those needs means more than shipping drums or quoting specs. It means continuous improvement, sharing hard-won knowledge, and earning trust with every production run. That is what sets a dedicated manufacturer apart and gives Cyclopentyltrichlorosilane its enduring industrial value.