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1-Iodo-3,5-Dimethylbenzene

    • Product Name 1-Iodo-3,5-Dimethylbenzene
    • Alias 3,5-Dimethyliodobenzene
    • Einecs 636-098-5
    • 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

    833214

    Iupac Name 1-Iodo-3,5-dimethylbenzene
    Cas Number 2243-39-6
    Molecular Formula C8H9I
    Molar Mass 232.07 g/mol
    Appearance Colorless to pale yellow liquid
    Boiling Point 238 °C
    Melting Point −6 °C
    Density 1.684 g/cm³
    Refractive Index 1.608
    Flash Point 99 °C
    Solubility In Water Insoluble
    Pubchem Cid 75225

    As an accredited 1-Iodo-3,5-Dimethylbenzene factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.

    Packing & Storage
    Packing The chemical is supplied in a 100 g amber glass bottle, tightly sealed, with a hazard label, product name, and batch number.
    Shipping 1-Iodo-3,5-dimethylbenzene is shipped in tightly sealed containers, protected from light and moisture, and labeled according to hazardous material regulations. It is typically transported via ground or air by certified carriers, with documentation compliant with DOT, IATA, and IMDG requirements. Handle with care due to its flammability and potential health hazards.
    Storage 1-Iodo-3,5-dimethylbenzene should be stored in a tightly closed container, in a cool, dry, and well-ventilated area, away from sources of heat, ignition, and incompatible substances such as strong oxidizers. Protect from light and moisture. Ensure proper labeling and avoid direct sunlight. Use secondary containment if necessary to prevent leaks or spills. Handle under fume hood if possible.
    Application of 1-Iodo-3,5-Dimethylbenzene

    Applications of 1-Iodo-3,5-Dimethylbenzene in Industrial Manufacturing

    1-Iodo-3,5-dimethylbenzene is a specialized aromatic compound used as a key building block in advanced chemical synthesis. As a direct manufacturer, we support multiple downstream sectors with tailored grades to meet current regulatory and quality standards. The following application fields reflect real industrial use cases and precise technical integration.

    1. Pharmaceutical Intermediate Synthesis

    Pharmaceutical producers employ 1-iodo-3,5-dimethylbenzene to construct complex molecules for APIs (active pharmaceutical ingredients). Its selective halogen position allows clean formation of biaryl and heteroaryl linkages during Suzuki and Ullmann cross-coupling reactions. Our material ensures high chemical purity to minimize side reactions and residual impurities, supporting GMP qualification and batch traceability. Manufacturers adjust the charge ratio according to the synthetic route and target moieties, often scaling from pilot to commercial production under validated conditions.

    Industry compliance standards

    • ICH Q7 Good Manufacturing Practice for Active Pharmaceutical Ingredients
    • 21 CFR Part 211 (US FDA cGMP)
    • European Pharmacopoeia for chemical purity and residual solvents

    Typical usage ratio

    • 0.8–1.2 equivalents per coupling step, adjusted by target API and reaction selectivity
    • Process optimization can reduce excess iodine donor depending on scale and catalyst efficiency

    Downstream process integration

    • Entered during Stage 1 or Stage 2 of multi-step synthesis, post-activation with transition metal catalyst
    • Used directly in closed-system reactors under inert gas

    Final product types

    • Anticancer drugs (e.g., selective kinase inhibitors)
    • Specialty CNS (Central Nervous System) actives
    • Custom intermediates for new molecular entities

    2. Agrochemical Intermediate Production

    Agrochemical manufacturers require high-purity halogenated benzenes for introducing specific substituents into crop protection molecules. 1-Iodo-3,5-dimethylbenzene participates in regioselective coupling to build herbicide and pesticide cores. The raw material supports scalable, controlled bromination, formylation, or nitration steps for seed compound discovery and upscaling validated process flows. Traceability and batch homogeneity remain critical for regulatory compliance in the industry, especially for residue and toxicity analysis in the finished product.

    Industry compliance standards

    • FAO/WHO Joint Meeting on Pesticide Specifications (JMPS)
    • REACH Regulation (EC) No 1907/2006 for chemical safety
    • ISO 9001-certified quality management for intermediates

    Typical usage ratio

    • 1.0 equivalent per coupling or derivatization step; excess up to 10% may be used to drive yield in multi-ton scale

    Downstream process integration

    • Usually fed post-nucleophilic aromatic substitution to introduce functional moieties
    • Batch and continuous flow reactors depending on final molecule complexity

    Final product types

    • Herbicide intermediates (phenoxyacetates, pyridine carboxylates)
    • Fungicide precursors (azole derivatives)
    • Insecticide core scaffolds

    3. Liquid Crystal Material Manufacturing

    Specialty materials companies use iodinated aromatic precursors for synthesizing advanced liquid crystal compounds in display technology. 1-Iodo-3,5-dimethylbenzene is employed as a mesogenic core or coupling reagent to produce high birefringence and improved thermal stability characteristics in display panels. Manufacturers demand strict control of halogen content and low trace metal contamination to prevent threshold shifts in end-use performance for LCD and OLED applications.

    Industry compliance standards

    • RoHS Directive (2011/65/EU) for electronic raw materials
    • IEC 61249-2-21 for halogen-free material assessment
    • Internal QC protocols for photostability and purity >99.5%

    Typical usage ratio

    • 0.9–1.05 molar equivalents; optimized for each core segment in iterative coupling reactions

    Downstream process integration

    • Charged at the aromatic iodination or metal-catalyzed coupling stage
    • Controlled temperature and solvent polarity critical to maximize product YIELD and prevent by-product formation

    Final product types

    • Nematic and smectic liquid crystal mixtures
    • Intermediate mesogens for LCD displays
    • Specialty OLED segment precursors

    4. Advanced Dye and Pigment Synthesis

    Colorant and pigment industries incorporate methylated iodo-benzenes for generating specialty dyes with unique absorption properties. In chromophore assembly, the compound offers a reactive site for palladium-catalyzed C–C bond formation, enabling access to custom shade development and improved pigment dispersion. Batch reproducibility, precise halogen placement, and minimized contaminant carry-over matter for pigment performance in high-end coatings and inks.

    Industry compliance standards

    • EN 71-3 for safety of toy pigments
    • ISO 787-24 for general methods of pigment testing
    • Quality standards for color index registration (C.I. numbers)

    Typical usage ratio

    • 0.8–1.3 equivalents per coupling, subject to target dye structure and purity requirements

    Downstream process integration

    • Introduced at the key halogen exchange or coupling unit operation
    • Mixing optimized to ensure homogeneous reaction and avoid color shade variability

    Final product types

    • Performance dyes for textile printing
    • High-stability pigments for automotive paints
    • Specialty colorants for electronic displays

    5. Specialty Polymer Functionalization

    Polymers containing halogenated aromatic monomers display tailored properties such as flame retardancy, chemical resistance, and altered glass transition temperatures. 1-Iodo-3,5-dimethylbenzene is introduced in copolymerization reactions to confer these characteristics in high-value engineering plastics. Direct substitution reactions and co-extrusion with other aromatic monomers ensure property enhancement in the resulting polymer chains. Strict monitoring of residual iodine and unreacted monomer is conducted in process QC.

    Industry compliance standards

    • UL 94 for classification of plastic flammability
    • ISO 11357 for differential scanning calorimetry in plastics
    • REACH Annex XVII for restricted substances in polymers

    Typical usage ratio

    • 0.2–0.6 molar fraction in copolymerization, adjusted for intended property modification and chain length

    Downstream process integration

    • Copolymerization in solution or melt state, usually accompanied by radical initiator or transition metal catalyst
    • Blending with base polymer feedstock before extrusion

    Final product types

    • High-performance engineering resins
    • Flame retardant polymer compounds
    • Chemical-resistant plastics for specialty components
    Free Quote

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    Certification & Compliance
    More Introduction

    Bringing 1-Iodo-3,5-Dimethylbenzene to Industry: Practical Value and Unique Features

    A Chemical Built for Modern Synthesis

    As a manufacturer with decades of practical experience behind the reactors and distillation columns, our understanding of aromatic iodides grows with every batch. 1-Iodo-3,5-dimethylbenzene stands out as a specialty intermediate that attracts the interest of labs and factories across multiple industries. Its molecular formula, C8H9I, reflects a precise structure: a benzene ring carrying two methyl groups and an iodine atom at clearly defined positions. The arrangement matters. It shapes reactivity and downstream compatibility in ways that more basic alkyl iodides can't match. The subtle differences in electronic distribution give this molecule a tangible edge in advanced organic synthesis and pharmaceutical development.

    Refining Raw Materials, Achieving Purity

    Every bottle of 1-iodo-3,5-dimethylbenzene that leaves our facility passes through a series of checks, from in-process GC analysis to final product verification. We source our starting materials—such as 3,5-dimethyltoluene and iodine—from trusted suppliers with proven consistency. Our reactors handle iodination with finely tuned controls on temperature and agitation. Recrystallization and vacuum distillation help push impurity levels below accepted industry thresholds. The product typically reaches high assay grades, supporting sensitive applications like cross-coupling or halogen-metal exchange reactions. Customers notice the difference in product stability, with minimized side products that could interfere with catalytic cycles or downstream transformations.

    Why Dimethylbenzene Derivatives Matter

    Manufacturers working in agrochemicals, pharmaceuticals, and materials science often search for building blocks that balance reactivity with selectivity. Not every iodobenzene derivative delivers the same performance in Suzuki, Sonogashira, or Heck reactions. The 1-iodo-3,5-dimethylbenzene variant, thanks to its para-oriented methyl groups, displays distinct behavior compared to its mono-alkylated or non-alkylated relatives. Users observe greater site specificity in metal-catalyzed coupling steps, and the electron-donating effect of the methyl groups can lower activation barriers without triggering unusual byproducts. These features enable more efficient syntheses, fewer purification headaches, and a stronger chance of achieving patentable molecular targets.

    Differences That Make an Impact

    Our clients frequently seek clarity on why this particular compound fares better than similar halogenated aromatics. Take 1-iodo-2,4-dimethylbenzene, for instance. Its physical properties and steric bulk are similar, yet its substitution pattern can frustrate selectivity in para-directed functionalization. In contrast, the 3,5-dimethyl configuration in our product allows for streamlined downstream modifications, such as ortho-lithiation or controlled bromination. Conventional iodobenzene lacks the methyl substituents entirely, leading to different solubility profiles and often requiring more aggressive reaction conditions in complex molecule assembly. Choosing 1-iodo-3,5-dimethylbenzene often means smoother workflows and a better yield-to-effort ratio.

    Scaling from Small Batches to Multi-Ton Runs

    Demand for choice intermediates fluctuates between sectors. Academic groups often begin with sub-kilogram scales for exploratory synthesis or ligand design. These researchers care most about reproducibility, homogeneous crystalline appearance, and detailed QA documentation. Scaling up for industrial users, we adapt our process to ensure pump transfer reliability and heat transfer uniformity during larger iodination runs. Many of our larger clients value the predictability of melting point and the ability to trace each batch through integrated ERP systems. They employ this compound in sequence steps—either for direct aromatic substitution or as a precursor to more complex scaffolds—where every gram counts toward the bottom line.

    Safe Handling Built Into the Process

    Handling halogenated intermediates brings its own set of challenges. The heavy iodine atom, while making the molecule remarkably reactive, calls for careful management during storage and dispensing. Our facilities are equipped with sealed containment, jacketed vessels, and inert gas purging to minimize contamination and moisture uptake. We emphasize minimal exposure protocols, meaning that every drum or bottle comes with recommendations validated through our own risk assessments. Most of our industrial partners maintain proper ventilation and environmental monitoring, relying on accurate SDS documentation and lot-specific impurity profiles for every delivery.

    Supporting New Chemistry and Old Standards

    Every year brings new reports from global R&D labs unlocking fresh uses for this compound. In medicinal chemistry, researchers have leveraged it for constructing biphenyl systems, introducing alkoxy or alkyl groups with precision. In material science, the aromatic backbone supports electronic and optical device assembly, extending its reach beyond fine chemicals and pharmaceuticals. Our long view of the industry tells us that while certain end-users push for innovation at the molecular level, many appreciate knowing that their source remains stable, with transparent quality practices and a willingness to discuss custom requirements.

    From the Workbench to Large-Scale Production

    Making this compound in the lab can look deceptively simple: mix, heat, separate. In reality, the full-scale process relies on tightly planned logistics—ensuring fresh iodine reserves, clean pipelines, and robust quality controls. We tailor flow rates in our reactors to avoid over-iodination or excessive byproduct formation. Every batch undergoes a cooling protocol that stabilizes the product structure, so customers never encounter unpleasant surprises with melting or solubility during their own syntheses. Experience has taught us that neglecting even minor details—like solvent composition or agitation speed—undercuts reproducibility. Decades in the industry leave little room for cutting corners.

    Care for the Environment and Community

    Running a chemical plant involves more than maximizing output. Our team invests time and resources into monitoring emissions, recovering solvents, and cycling waste streams through licensed processors. The iodination step, which at one time posed disposal headaches, now contributes to a circular process by facilitating the recovery of unreacted iodine. Each improvement draws on feedback from operators, chemists, and external auditors, aiming for compliance with tightening regional and global regulations. We document wastewater loads, monitor for trace halides in air emissions, and balance production goals with responsibility to our neighbors and employees.

    Product in Practice: Beyond the Laboratory

    Commercial customers often rely on 1-iodo-3,5-dimethylbenzene for multi-step syntheses where each intermediate must meet stringent standards, not only for purity but also for consistency of color and physical form. The white-to-pale product expected in literature results from a precisely controlled process; lower-quality runs elsewhere can deliver tints or particulate contamination that gum up reactors or lead to off-spec end products. Our years of batch record analysis and customer feedback confirm that regular process audits and modest improvements yield higher overall satisfaction. Chemists in the field appreciate predictable reactivity traits, especially under aqueous phase extraction or elevated temperature conditions.

    Handling the Unexpected: Real-World Lessons

    Over the years, we faced challenges from batch-to-batch variation and new impurity profiles as suppliers changed or new regulations hit the market. Each time, iterative process tweaks—slower cooling rates or altered crystallization solvents—helped us retain product consistency. Experience also taught us the value of direct relationships with users. We respond to customer questions not with generic advice, but with specific data from our own plant: what agitation speed works best in precipitation, which filter pore size avoids unnecessary yields loss, and how trace water influences color and shelf-life. The dialogue shapes product evolution.

    Tailored Solutions for Complex Demands

    Clients from pharmaceutical scale-up teams often need tighter tolerances. With new drug registrations depending on intermediate documentation, our plant runs custom analytical checks for interested parties, extending to NMR, GC-MS, or HPLC data on request. Material scientists, in their own way, value clarity of communication and willingness to discuss product behavior at higher loadings or unusual temperatures. Years in the field prepared us for these demands, giving our teams the insight to recommend process modifications that translate directly to improved yields and less downtime for customers.

    Understanding the Market Forces

    Interest in aromatic iodides fluctuates with external pressures—from global supply chain disruption to new synthetic methods emerging in the literature. We monitor these changes not as abstract trends but through real interactions with procurement managers and research scientists. Rising labor or raw material costs have prompted us to adopt leaner practices, automating more steps and adjusting scale as necessary. In times of supply crunch, our regular inventory reviews and advance purchase commitments make the difference between prompt fulfillment and costly delays. Knowing precisely which grade or lot aligns with a customer’s intended application avoids waste and lost productivity.

    Comparing to Other Halogenated Aromatics

    Bench chemists and process developers often ask how 1-iodo-3,5-dimethylbenzene compares to brominated or chlorinated analogs. From hands-on experience, bromides sometimes require harsher activation or risk more side reactions in Pd-catalyzed couplings; chlorides usually fall short on reactivity, especially at milder temperatures. The heavy iodine atom in our compound opens up faster, cleaner cross-coupling, which translates into real cost and time savings at multi-gram and multi-kilogram scales. The methyl substitution pattern does more than fine-tune reactivity—it often leads to unique downstream intermediates unobtainable with other halide sources.

    Quality That Stands Up to Testing

    Years of analytic testing created a knowledge base for batch release. Each drum and flask shipped carries not only a quality certificate but a traceable trail of analytical data. Technicians collect IR and NMR spectra at batch completion, spot checking against known impurity signatures, and we cross-reference against both in-house and external QC standards. Users running scale-up syntheses note lot-to-lot consistency in melting point and spectral signatures, supporting rapid troubleshooting if unexpected results arise on their end. By sharing spectral data and real impurity levels openly, we contribute to smoother downstream development cycles.

    Listening to the Feedback Loop

    Our journey refining 1-iodo-3,5-dimethylbenzene owes as much to outside voices as internal R&D. Each year brings new challenges: a different solvent question from a process engineer, a purity threshold raised by a regulatory inspector, an application-specific request from a formulator trying an unfamiliar reaction. Over time, recurring questions shape our approach to manufacture and quality control. Building in flexibility, we maintain the ability to change lot size, tweak purification, and even re-test samples before shipment. Keeping the lines open ensures both sides keep learning and improving.

    Expanding Applications: A Broader Horizon

    Applications for this compound continue to expand, reaching into polymer chemistry, lighting, and advanced materials beyond its classic roles. Technological advances in catalysis and process intensification make aromatic iodides like this more attractive for commercial synthesis. New published methods showcase easier cross-coupling of challenging substrates, pushing product demand beyond traditional boundaries. Clients from earlier-stage startups often approach us ready to experiment with these protocols, appreciating a partner who gives solid answers about product handling and compatibility based on direct manufacturing experience. This two-way growth—technology shaping demand, feedback shaping supply—keeps our production teams nimble and attentive to changing industry needs.

    Delivering Consistency and Value

    No glossy description can substitute for decades of hands-on expertise handling halogenated aromatics. 1-Iodo-3,5-dimethylbenzene forms a small but critical part of countless multi-step syntheses, offering measurable advantages in selectivity, handling, and downstream modification. For every customer, from the academic researcher running one reaction to the multinational scaling up a full production campaign, the relationship between manufacturer and user remains foundational. Transparency over raw materials, batch conditions, and analytical testing builds a base of reliability, while openness to adaptation keeps the supply line moving forward. Guided by a strong history of technical competency and direct feedback from users, we strive to make each batch of 1-iodo-3,5-dimethylbenzene not only predictable, but practically valuable across a broad set of modern industrial applications.