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1,3-Dibromo-5-Isopropylbenzene

    • Product Name 1,3-Dibromo-5-Isopropylbenzene
    • Alias 1,3-Dibromo-5-(propan-2-yl)benzene
    • Einecs 248-866-3
    • Mininmum Order 1 g
    • Factory Site Tengfei Creation Center,55 Jiangjun Avenue, Jiangning District,Nanjing
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    • Manufacturer Sinochem Nanjing Corporation
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    Specifications

    HS Code

    395175

    Cas Number 51505-00-9
    Molecular Formula C9H10Br2
    Molar Mass 293.99 g/mol
    Iupac Name 1,3-dibromo-5-(propan-2-yl)benzene
    Appearance Colorless to pale yellow liquid
    Boiling Point 259-261 °C
    Density 1.69 g/cm³ (approximate)
    Flash Point 115 °C
    Solubility In Water Insoluble
    Refractive Index 1.601 (approximate)
    Smiles CC(C)C1=CC(=CC(=C1)Br)Br

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

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    Application of 1,3-Dibromo-5-Isopropylbenzene

    Applications of 1,3-Dibromo-5-Isopropylbenzene in Industrial Manufacturing

    We supply 1,3-Dibromo-5-Isopropylbenzene directly to specialty manufacturers worldwide. Our production facilities support high-purity supply chains in fine chemical synthesis, advanced materials, and life sciences intermediates. Below are key industrial application scenarios, detailing precise use, compliance, formulation, and finished product information as requested by downstream customers.

    1. Pharmaceutical Intermediate for Active Pharmaceutical Ingredients (APIs)

    1,3-Dibromo-5-Isopropylbenzene functions as a halogenated aromatic intermediate during API synthesis, particularly in the production of molecules where the bromo groups serve as functional handles for further coupling or substitution. Medicinal chemistry teams specify its use for constructing side chains and ring modifications in research and GMP-scale operations. Its isopropyl substituent controls regioselectivity in key palladium-catalyzed cross-couplings, ensuring purity and batch consistency for regulated production lines.

    Industry compliance standards

    • Current Good Manufacturing Practice (cGMP) – ICH Q7
    • US FDA 21 CFR Part 210/211 for API processes
    • EU GMP – EudraLex Volume 4 for starting material controls
    • USP, EP monograph reference for final API release (where applicable)

    Typical usage ratio

    • 0.15–0.35 molar equivalents relative to main ring-building reagents
    • Adjusted based on required yield and intermediate conversion, as determined by in-process HPLC or NMR monitoring

    Downstream process integration

    • Introduced after initial aromatic framework assembly, pre-functionalization via bromination or Suzuki coupling
    • Often loaded in jacketed glass-lined reactors for batch reaction control
    • Purification follows, using silica gel or preparative chromatography before transition to next API synthesis stage

    Final product types

    • Small molecule APIs (oncology, CNS, anti-inflammatory drugs)
    • Advanced pharmaceutical intermediates for CDMO supply
    • Specialty compounds in combinatorial drug discovery programs

    2. Building Block for Agrochemical Active Compounds

    Agrochemical synthesis labs use 1,3-Dibromo-5-Isopropylbenzene for the preparation of pre-emergent herbicide and fungicide active ingredients, especially where selective halogenation increases bioactivity or target specificity. The dual bromine content enables efficient downstream derivatization, enhancing activity in substituted phenyl and biphenyl scaffolds. Isopropyl substitution assists in modulating the persistence and volatility required for crop protection compounds.

    Industry compliance standards

    • FAO/WHO Specifications for Plant Protection Products
    • OECD Principles of Good Laboratory Practice (GLP)
    • US EPA Pesticide Registration 40 CFR Part 158 for technical active ingredient data
    • ISO 17025 for analytical release testing at customer site

    Typical usage ratio

    • 10–25% by mass relative to overall active ingredient synthesis batches
    • Adjusted based on targeted bioactive moiety substitution patterns and lab scale-up trials

    Downstream process integration

    • Entered post initial aromatic derivatization in technical-grade active synthesis
    • Reacted in temperature-controlled vessels prior to sulfonation or nitration steps
    • Product isolation by crystallization or liquid-liquid extraction before formulation

    Final product types

    • Pre-emergent and selective herbicide actives
    • Fungicidal technical concentrates
    • Intermediates for insecticide or synergist development

    3. Monomer for Specialty Polymer Modification

    Polymer manufacturers integrate 1,3-Dibromo-5-Isopropylbenzene into the synthesis of high-performance resins and thermosets, leveraging dual bromination for enhanced flame retardancy or crosslinking functions. The aromatic backbone with isopropyl group enables control over polymer flexibility and heat distortion properties. This compound serves as both a chain extender and a reactive site for post-polymerization modification in advanced composites.

    Industry compliance standards

    • UL 94 Flammability Standard for Plastic Materials
    • REACH Annex XVII for restrictions on certain brominated compounds
    • ISO 9001:2015 for polymer manufacturing QMS
    • RoHS Directive (EU 2011/65) for electronic component applications

    Typical usage ratio

    • 2–8% by weight as a co-monomer or additive during resin compounding
    • Level tailored based on flame retardancy specifications required for UL or VDE certifications

    Downstream process integration

    • Dosed during melt or solution polymerization stages with engineered stirring and temperature controls
    • Participates in crosslinking reactions with di- or tri-functional hardeners
    • Incorporated prior to extrusion or casting of finished polymer sheets or molded components

    Final product types

    • Flame-retardant reinforced plastics
    • Specialty epoxy and phenolic resins
    • Printed circuit board base materials
    • High-performance adhesives/sealants for construction and electronics

    4. Fine Chemical Intermediate for Liquid Crystal Materials

    Manufacturers serving the electronic display sector utilize 1,3-Dibromo-5-Isopropylbenzene to introduce specific halogen patterns in aromatic cores for liquid crystal precursors. The molecule supports synthesis of biphenyl and terphenyl derivatives with tailored dipole moments, critical for optimizing phase transition temperatures in advanced display technologies. High-purity grades support tight impurity controls required for optical and electro-optic performance.

    Industry compliance standards

    • IEC 61249-2-7 for liquid crystal material safety
    • ISO 9001 with specific Clean Room Management requirements
    • Restriction of Hazardous Substances (RoHS) for electronics applications
    • JFCC (Japan Fine Ceramics Center) voluntary guidelines for purity and trace metals

    Typical usage ratio

    • 0.10–0.40 molar equivalents, dependent on oligomer chain length and isomer target
    • Fine-tuned to achieve nematic or smectic phase parameters after pilot runs

    Downstream process integration

    • Charged into reactors during Friedel-Crafts or Suzuki couplings for rigid aromatic core assembly
    • Precursor purification through high-vacuum distillation or column chromatography
    • Followed by functional group insertion to form final mesogen structure

    Final product types

    • LCD and OLED liquid crystal mixtures
    • Custom mesogens for advanced display prototypes
    • Optically active films for electronic and scientific devices

    5. Synthesis of Performance Additives in Lubricant and Grease Formulations

    Producers in the specialty lubricant sector use 1,3-Dibromo-5-Isopropylbenzene as a building block for high-stability antioxidant and anti-wear additives. Its stable aromatic framework and bromine content yield target molecules that enhance oxidative resistance and thermal lifespan of industrial and automotive lubricants. The isopropyl group imparts improved solubility and additive dispersibility in base oil matrices.

    Industry compliance standards

    • ASTM D4951-19 for additive content in lubricants
    • API Engine Oil Category Requirements (SN, CK-4, FA-4, etc.)
    • REACH Registration, Evaluation, Authorisation and Restriction of Chemicals
    • ISO 21469 for lubricant hygiene safety (industrial environments)

    Typical usage ratio

    • 0.5–2.0% by mass of additive package in formulated lubricant
    • Level adjusted depending on required test performance such as TBN, oxidation induction time, and sector-specific end use

    Downstream process integration

    • Reacted with functionalizing agents to yield antioxidants, detergents, or dispersants
    • Blended post-reactor with base oils during additive concentrate manufacturing
    • Quality control by ASTM and in-house GC-MS before packaging

    Final product types

    • Industrial gear oils
    • Automotive engine lubricants
    • Heavy-duty greases
    • Specialty fluid additives
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    More Introduction

    Introducing 1,3-Dibromo-5-Isopropylbenzene: Values, Features, and Distinctions

    The Character of This Compound

    1,3-Dibromo-5-Isopropylbenzene stands out in the world of fine chemicals. Many people working in research and industry look for materials that bring reliability alongside high purity. Here, the model number points to a specific molecular structure. The two bromine atoms sit on the aromatic ring with a precise arrangement, flanking an isopropyl group. Chemists appreciate this configuration because it avoids unnecessary complexity, granting a clean starting point for further synthesis.

    This product appears as a colorless or slightly yellowish liquid at room temperature—telltale signs for those who have spent time in a well-stocked laboratory. Connoisseurs of aromatic chemistry often seek out clear, well-characterized reagents for tough transformations or to build molecular frameworks. The melting point sits comfortably above room temperature, making storage and handling straightforward, and its moderate boiling point reflects common values for such substituted benzenes. Its molecular formula—C9H10Br2—doesn’t just tell a chemist what’s inside a flask, but also sits at the base of countless published protocols and reaction schemes.

    Why This Molecule Matters

    Finding effective intermediates for organic synthesis requires more than access—it demands a measure of trust that the substance performs as claimed. Over the years, 1,3-Dibromo-5-Isopropylbenzene has turned up again and again as a backbone for more complex molecules used in pharmaceuticals, agricultural chemistry, and advanced materials. Chemists who work on aromatic coupling reactions often choose this molecule as a launching pad for Suzuki or Heck-type reactions. The positions of the bromine atoms give the right spacing, opening doors to symmetrical and unsymmetrical products without the headaches brought by isomeric confusion.

    In my own experience, I often leaned on substituted benzenes like this for building blocks. The isopropyl side group doesn’t just decorate the ring—it has a way of guiding where new bonds form and stabilizing intermediate structures, an outcome well-backed by both textbooks and experimental data. Compared with plain dibromobenzene, the presence of the isopropyl group offers new opportunities to tune solubility and influence reaction outcomes, whether in research benches or pilot plant batches.

    Usage in Chemical Synthesis

    Aromatic synthesis depends on reagents that play well with standard solvents and catalysts. 1,3-Dibromo-5-Isopropylbenzene dissolves easily in common organic solvents like ether, dichloromethane, and toluene, carrying over into subsequent steps without fuss. Experienced hands often turn to this reagent for cross-coupling, where clean, high-yield reactions become more possible thanks to the arrangement of those bromine atoms.

    Looking at real-world laboratories, technicians and researchers deploy this product in both small-scale exploratory synthesis and more industrial-scale settings. Its reliability prevents downtime and costly troubleshooting. The use stretches from pharmaceutical lead optimization—where new compounds face rigorous biological screening—to developing ligands and functional materials necessary for next-generation electronics. Each time, the specificity of the brominated and isopropylated ring supports growth, testing, and application.

    Stand-Out Features

    Skilled chemists single out this type of substituted benzene for the clarity it brings to synthesis pathways. Most alternative products either lack the tailored reactivity or introduce more risk for unwanted isomer formation. For researchers accustomed to the quirks of chemical scale-up, the consistent melting and boiling points of this substance simplify purification—crucial details when refining kilograms of product for downstream production.

    Another valued feature lies in trace contaminant profiles. In well-made batches, impurities common in non-standard syntheses—like dibromotoluenes or polynuclear bromides—show up in much lower amounts. This translates to greater certainty not only in bench chemistry, but also in regulated environments where batch reproducibility means everything. High-purity lots support strict quality management, earning space even in labs where margins for error run thin.

    Comparison with Other Brominated Benzenes

    Seasoned hands know that not all brominated arenes work the same way. For example, standard 1,3-dibromobenzene gives a symmetrical substrate but lacks the directing influence of the isopropyl side chain. That substituent changes electron density around the ring, influencing coupling partners’ approach and product outcome—an effect supported by dozens of peer-reviewed studies across both physical and synthetic organic chemistry.

    Some users turn to halogenated toluenes or xylenes, seeking similar effects, but those molecules yield a different landscape of reactivity. Placement of the isopropyl side group at the 5-position versus methyl groups on toluene not only adjusts steric bulk but also shifts chemical behavior. Colleagues working in medicinal chemistry point to these differences when designing molecules where selectivity and metabolic stability require fine-tuned choices.

    1,3,5-Tribromobenzene as an alternative offers more leaving groups—useful in certain cases but introducing greater complexity in selectivity and purification. Handling multiple bromine atoms with indiscriminate reactivity increases side reactions and sometimes waste, which can bog down research or production if not kept in check.

    Reliability Backed by Experience

    People who work with fine chemicals know that reliability springs from more than specification sheets. In my own shifts in university and contract manufacturing, the compounds that earned lasting trust proved themselves in the flask and during analysis. 1,3-Dibromo-5-Isopropylbenzene fits that pattern. It stores well in tightly sealed bottles, resists rapid degradation, and retains purity on the shelf. Chromatographers see sharp peaks and little baseline noise, helping distinguish it in complex reaction mixtures.

    The reputation of this compound has built through decades of use, stemming from its availability in research and commercial markets along with supportive literature. Every new project that tacks on aryl bromides benefits from the rich backdrop of published routes, applications, and troubleshooting notes. Many of my mentors spoke highly of compounds with well-known properties because that kind of familiarity saves time and spares headaches.

    Fact-Based Importance in Today's Labs

    Emphasis on reliability and traceability gets stronger each year, especially in labs supporting global supply chains. Modern quality standards demand rigorous proof of both identity and purity—demands that 1,3-Dibromo-5-Isopropylbenzene meets with regular, reproducible testing. NMR and GC analyses show high congruency with reference spectra, and the standard sample integrates smoothly with quality control protocols in regulated settings.

    The chemistry community recognizes this product’s role in the pipeline from bench discovery to process chemistry and final product application. Its stability against common lab conditions, predictable reactivity, and clarity of isolation allow it to function on both small and large scale. People investing in custom synthesis projects communicate often about minimizing avoidable risks; well-proven intermediates reduce uncertainty, streamline timelines, and help bring innovations to market faster.

    Supporting Innovations in Applied Chemistry

    The long shelf life of 1,3-Dibromo-5-Isopropylbenzene supports inventory planning in settings where downtime cuts into tight margins. The product’s chemical profile lets scientists confidently develop new ligands, cross-coupling partners, and functionalized frameworks without dealing with unplanned surprises in reactivity. In pharmaceutical process chemistry, even small unplanned changes in reactivity can set back development. As a researcher who has shepherded projects from milligram proofs to kilogram lots, I value the predictability and peace of mind that recognizable, well-documented molecules provide.

    Looking at recent research, this compound features prominently in the creation of new polymers and advanced materials, meeting needs from light-responsive materials to electronic device precursors. The presence of both the isopropyl and bromine substituents carves a useful path for further manipulation. Process chemists counting on scale-up success favor intermediates like this where every process variable has precedent, and analytical fingerprints appear across studies.

    Practical Details for the Everyday User

    A good supplier ships 1,3-Dibromo-5-Isopropylbenzene in amber glass bottles, protecting it from photodegradation—small details like this limit spoilage and waste. Handling calls for established lab techniques: standard nitrile gloves, good ventilation, careful weighing. Unlike volatile or highly toxic brominated aromatics, this product’s moderate vapor pressure keeps fume hood loads manageable in ordinary lab work. Spill cleanups follow the same routine as other midweight organics—quick attention, gentle absorbents, and appropriate waste streams.

    Any practical lab technician can tell you that running out of a key intermediate mid-experiment derails schedules. Having compounds with reliable shelf life and strong documentation makes reordering and stock control easier. The storage and use of this compound don’t require specialized infrastructure, making it accessible across a range of institutions. Years of data show this product keeps its quality over multiple months, so long as bottles stay sealed and stored away from strong light or heat.

    Environmental and Safety Perspectives

    Awareness about chemical safety and environmental impact has grown. The industry now expects chemical intermediates to be safer to use, easier to monitor, and amenable to responsible disposal practices. 1,3-Dibromo-5-Isopropylbenzene ranks as less volatile than lighter brominated benzenes. The relatively high boiling point minimizes accidental releases, and its low vapor pressure helps contain laboratory exposures. Standard fume hoods and personal protective equipment achieve generally effective containment, though as with all brominated compounds, careful handling and good hygiene reduce unnecessary risk.

    Once it enters the waste stream, standard protocols treat this molecule with oxidation or incineration. Modern treatment facilities keep track of such substances to avoid brominated byproducts entering the water supply. The right approach involves communicating about waste handling upfront, supporting proper documentation, and using licensed disposal contractors. Labs prioritizing safety practices find that incorporating such compounds into routine disposal is straightforward, given published guidelines and decades of accepted handling experiences.

    Challenges in the Current Market

    Not every batch comes out perfect—and people running scale-ups or sensitive syntheses know the headaches of occasional out-of-spec material. Variability in synthesis quality, price fluctuations, and periodic supply chain delays can hit budgets and timelines. Even with considerable data and best practices, raw material source, method of preparation, and shipping conditions influence the finished product. It’s become critical to choose suppliers who demonstrate a commitment to full documentation, lot traceability, and responsive customer service.

    The challenge extends beyond supply: managing worker exposure and environmental discharge asks for vigilance and regular training. Regulatory oversight continues rising, and thorough documentation supports compliance audits. To meet these challenges, chemists and procurement specialists need to communicate better, sharing batch performance data, and watching for trends signaling shifts in product quality or availability. I remember sitting in project meetings where a single aberrant lot of an intermediate like this caused hours of troubleshooting, reinforcing the need for transparent sourcing and quality checks before production batches get underway.

    Advancing Solutions for Better Chemistry

    Addressing challenges means acting across several fronts. Setting up robust supplier qualification procedures, expanding quality management systems, and fostering close partnerships between end users and producers bridge the gap between expectation and supply. Research on greener synthetic routes continues, aiming to produce this compound with reduced waste and better atom economy.

    Teams handling sensitive processes start by validating new lots through in-house analysis—confirming identity using NMR, HPLC, or GC-MS before approving for use in critical operations. Clear, timely communication with suppliers about detected issues or performance trends incentivizes improvements and maintains high standards across the market.

    People working in the field also keep an eye on regulatory developments. Complying with updated transportation or storage regulations avoids shipment delays and smooths long-term supply for ongoing projects. Investing in ongoing training, sharing best practices across labs, and mentoring newcomers all raise overall standards for safe, effective chemical handling.

    Ethical and Responsible Use in Modern Context

    The journey from chemical building block to finished product passes through multiple hands, each adding value and responsibility along the way. Sustainable chemistry creates opportunities to limit resource use and reduce hazardous waste—not only for intermediates like 1,3-Dibromo-5-Isopropylbenzene, but for chemical supply chains in general. Ethical sourcing, strong tracking of batch origins, and conscious waste minimization build a record not only of technical reliability, but social responsibility.

    Over my years in the field, I have seen quality practices shift from “good enough” to demanding clear, audit-ready proof. Researchers who carry an ethic of stewardship for their chemicals, facilities, and teams recognize that even small changes in procurement or disposal habits ripple out to influence the broader industry. Sharing lessons, providing feedback to producers, and participating in industry groups moves the standards forward for everyone.

    Continued Importance in Scientific and Industrial Progress

    As laboratories and production sites confront new challenges—rising project complexity, tighter project timelines, and more scrutiny from regulators—reliable intermediates like 1,3-Dibromo-5-Isopropylbenzene remain crucial. The hard-won knowledge embedded in decades of published chemistry, spectral libraries, and anecdotal wisdom improves the confidence with which teams plan synthetic routes, troubleshoot bottlenecks, and scale up new ideas.

    Supply partners who demonstrate openness and real performance data foster a healthier marketplace. Industry and academics both gain when choices around chemical building blocks become more evidence-driven, transparent, and guided by shared values about health, safety, and sustainability.

    1,3-Dibromo-5-Isopropylbenzene stands as a reminder that even a single molecule, carefully made and thoughtfully applied, supports a chain of discoveries, products, and solutions that extend far beyond the lab bench. Those choosing reagents for their next innovation owe it to their work to select materials whose performance and provenance stand up to scrutiny from every angle.