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2,2'-Biphenol

    • Product Name 2,2'-Biphenol
    • Alias Biphenyl-2,2'-diol
    • Einecs 202-040-1
    • Mininmum Order 1 g
    • Factory Site Tengfei Creation Center,55 Jiangjun Avenue, Jiangning District,Nanjing
    • Price Inquiry admin@sinochem-nanjing.com
    • Manufacturer Sinochem Nanjing Corporation
    • CONTACT NOW
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    Specifications

    HS Code

    476855

    Chemicalname 2,2'-Biphenol
    Casnumber 1806-29-7
    Molecularformula C12H10O2
    Molecularweight 186.21
    Appearance White to off-white solid
    Meltingpoint 116-118°C
    Boilingpoint 276°C (at 760 mmHg)
    Solubility Slightly soluble in water, soluble in organic solvents
    Density 1.25 g/cm3
    Purity Typically ≥98%
    Synonyms 2,2'-Dihydroxybiphenyl
    Smiles C1=CC(=CC=C1)C2=CC=CC=C2O

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

    Packing & Storage
    Packing A sealed amber glass bottle containing 100g of 2,2'-Biphenol, labeled with chemical details, hazard symbols, and handling instructions.
    Shipping 2,2'-Biphenol is shipped in tightly sealed containers under dry, cool conditions and adequately labeled to comply with chemical safety regulations. Packaging ensures protection from moisture and light to prevent degradation. Handling and transport must adhere to relevant local and international guidelines, with documentation for safe and compliant delivery.
    Storage 2,2'-Biphenol should be stored in a tightly closed container, in a cool, dry, and well-ventilated area, away from incompatible substances such as strong oxidizing agents. Protect it from moisture and direct sunlight. Use appropriate personal protective equipment when handling, and keep the storage area clearly labeled. Follow all local regulations and safety data sheet (SDS) recommendations.
    Application of 2,2'-Biphenol

    Applications of 2,2'-Biphenol in Industrial Manufacturing

    As a primary manufacturer of 2,2'-Biphenol, we focus on supplying this high-purity compound to carefully selected, mature industrial markets where its specific chemical properties deliver proven downstream performance benefits. Our product is formulated, controlled, and shipped to meet the requirements of advanced polymer, electronics, coating, and pharmaceutical intermediate customers worldwide. Below, we detail established industrial application scenarios and supply-side technical parameters based on real-world experience and regulatory realities.

    1. Polyarylether Synthesis for High-Performance Polymers

    Major polymer producers incorporate this material as a core dihydroxyl monomer in the synthesis of specialty polyarylether resins, where its rigid molecular structure enhances the heat and chemical stability of engineering plastics. Formulators control additive ratios and feed conditions closely to meet stringent quality specifications for molded components used in electronics, automotive, and aerospace assemblies, requiring predictable melt flow, mechanical retention, and dielectric properties in the final resins.

    Industry compliance standards

    • ISO 9001:2015 quality management systems for resin manufacturing
    • UL 94 flammability ratings (for final resin usage)
    • RoHS and REACH conformity for controlled substances in electrical/electronic devices
    • IEC 61249-2-21:2017 (Halogen Free requirements in base materials for PCBs)

    Typical usage ratio

    • 0.8–1.0 molar equivalents relative to comonomers (such as difluorobenzene or halogenated phthalides); the precise proportion adjusted to target viscosity and molecular weight, with fine-tuning according to required glass transition temperature and final product form factor.

    Downstream process integration

    • Direct addition to polymerization reactors during high-temperature nucleophilic aromatic substitution with dihalogenated monomers; subsequent polycondensation in polar aprotic solvents if solution processing is required.

    Final product types

    • Heat-resistant thermoplastic sheets and rods
    • High-frequency printed circuit board laminates
    • Automotive electrical housing components
    • Thermostable cable insulation materials

    2. Antioxidant Precursors for Polymer Stabilizers

    Producers of high-performance plastic antioxidants utilize 2,2'-Biphenol as a precursor for constructing hindered phenolic stabilizer molecules, specifically in the synthesis of bis- or multi-substituted antioxidant frameworks that retard oxidative degradation in polymers subjected to high temperatures, UV light, or mechanical stress. The material’s structural arrangement supports synthesis of advanced additives used in downstream melt compounding or in-mold polymer processing lines.

    Industry compliance standards

    • FDA 21 CFR 177.1520 (for indirect food contact plastics)
    • Japanese Positive List (PL) for food apparatus resins
    • EN ISO 17025 for additive quality control laboratories
    • Chinese GB 9685-2016 (Safety of Additives in Food Contact Materials)

    Typical usage ratio

    • 0.2–0.5 wt% of phenolic antioxidant intermediate batch; the ratio varies based on target substitution pattern and desired balance of processing stability versus post-processing color retention in polyolefins and styrenics.

    Downstream process integration

    • Condensation, alkylation, or acylation with alkylphenols or thioester donors under controlled pH and temperature to form hindered bis-phenol antioxidants; isolation, purification, and subsequent downstream blending or masterbatch granulation.

    Final product types

    • Antioxidant masterbatches for polyolefins
    • Stabilizing additives for HDPE/LDPE films
    • UV-resistant engineering polymer granules
    • Wire and cable insulation stabilizers

    3. Specialty Coating Resins for Electronic Components

    Leading manufacturers of high-performance coating resins incorporate 2,2'-Biphenol into the polycondensation of thermostable and chemically resistant resin backbones for use in electronics encapsulation, conformal coatings, and solder mask products. The biphenolic structure imparts high dielectric stability, low moisture uptake, and color retention after thermal curing, critical for protecting sensitive circuitry and microelectronic substrates produced under tightly controlled manufacturing standards.

    Industry compliance standards

    • IEC 60216-1: Electrical insulating materials – thermal endurance properties
    • IPC-4101 (Specification for base materials for rigid and multilayer printed boards)
    • REACH Annex XVII for safe substances in coatings
    • RoHS Directive for hazardous substance restriction in electronics

    Typical usage ratio

    • 5–15% by weight in the binder resin constituent, with adjustment depending on resin type (epoxy, polyarylether, silicone-compatible systems) and application method (spray, dip, spin-coating, or screen-printing).

    Downstream process integration

    • Incorporation at the prepolymer stage of resin synthesis; post-modification to tune glass transition or crosslink density for distinct dielectric or chemical resistance targets; high-purity requirements to prevent electrical leakage or gel inclusion.

    Final product types

    • Solder mask resins for printed circuit boards
    • Conformal coatings for microelectronic assemblies
    • Potting compounds for power modules
    • Encapsulants for sensor and LED applications

    4. Pharmaceutical Intermediate for Active Ingredient Synthesis

    In the fine chemicals sector, pharmaceutical manufacturers use 2,2'-Biphenol as a building block in the multistep synthesis of complex active pharmaceutical ingredients (APIs) and as starting material for select ligands, catalysts, and enzyme inhibitors. The compound’s reactivity facilitates regioselective modification under chiral or metal-catalyzed transformations, supporting scalable production of intermediates under Good Manufacturing Practice protocols and analytical validation requirements.

    Industry compliance standards

    • ICH Q7 Good Manufacturing Practice Guidance for Active Pharmaceutical Ingredients
    • USP, EP, JP Pharmacopeial Monographs (for relevant APIs/intermediates)
    • WHO GMP certification for pharmaceutical ingredient sites
    • FDA 21 CFR Part 210 & 211 (US cGMP for drug substances)

    Typical usage ratio

    • Stoichiometric to 1.2-fold excess relative to target coupling or ring-closing reagents; the proportion is based on the synthetic step specification and projected impurity profile for downstream purification.

    Downstream process integration

    • Engaged as a reagent in regioselective oxidative coupling, catalytic asymmetric reactions, or as a key intermediate in multi-step organic transformations en route to final API crystallization; all stages monitored under validated in-process controls.

    Final product types

    • API intermediates for selective estrogen receptor modulators
    • Chemical ligands for chiral catalyst production
    • Antifungal and antibacterial intermediate compounds
    • Enzyme inhibitors for R&D and commercial pharmaceutical programs
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    Certification & Compliance
    More Introduction

    2,2'-Biphenol: Steadfast Performance Through Chemical Innovation

    Understanding 2,2'-Biphenol From the Manufacturer’s View

    Producing high-quality 2,2'-Biphenol has meant a commitment to robust process control and deep respect for what our customers build from it. Our teams have poured decades of combined experience into optimizing every stage, from raw material sourcing to finishing and packaging. Over that time, industry has kept turning toward 2,2'-Biphenol’s remarkable qualities—reliability in synthesis, versatility in downstream chemistry, and high consistency in purity—for good reason. Each batch represents not just chemical value, but also hours of careful planning, reactor monitoring, drying, and fine grinding. All these details matter, especially when our output becomes the backbone for active pharmaceutical ingredients, high-end polymers, or advanced coatings.

    Product Model, Specifications & What Sets Ours Apart

    2,2'-Biphenol, known by its molecular configuration as a dimeric phenol, represents a critical link between simple phenolic intermediates and more complex entities. We supply this material in both powder and crystalline forms, covering needs from bench R&D up to large-scale industrial adoption. Consistent purity above 99%—time and again—has become our standard benchmark, with key metrics such as residual moisture, single-point melting range, and heavy metal content tightly monitored and logged in every lot.

    Our process centers on oxidative coupling, using carefully selected catalysts that strip away the variability you might see from older or less systematic production lines. We’ve seen that sticking to these protocols reduces side products, keeps isomeric contamination low, and supports repeatable reactivity in customer processes. In QC, advanced HPLC and NMR analyses, not just routine melting point checks, confirm the structure and composition batch after batch. This hands-on oversight means less downtime for our clients, lower likelihood of batch rework, and smooth transfer to formulation or downstream synthesis.

    Exploring 2,2'-Biphenol’s Key Uses in Industry

    Demand for 2,2'-Biphenol isn’t rooted in a single sector. Its main claim to fame comes in polymer chemistry, especially when durability and clarity matter. Polyarylate and polycarbonate producers know this compound as a building block that delivers both rigidity and thermal stability, with molecular geometry setting up robust chain structures. Custom resin grades use our product for improved optical properties, low haze, and color retention. We’ve also worked with electronics firms that exploit 2,2'-Biphenol’s high thermal tolerance and oxidation resistance as a component in specialized capacitor films and circuit substrates.

    On the pharmaceutical side, medicinal chemistry depends on 2,2'-Biphenol for biaryl core construction, allowing medicinal scaffolds that bring multiple substituents into close proximity. This has enabled development of enzyme inhibitors, bioactive ligands, and intermediates for advanced API synthesis. Formulators favor our consistently pure stock for this reason—variations in impurity levels or functional group positioning can throw off entire discovery projects. Over the years, we’ve seen how subtle process tweaks upstream ripple through to yield, color, or stability in the final compound.

    We also serve niche but vital applications in catalyst development, dyestuff manufacturing, and agrochemical research. Our sales engineers stay in regular contact with clients developing new ligating agents, phosphorous modifiers, or redox-active dyes. They share feedback on solubility, particle size, and trace impurities, pushing us to refine further with every production run.

    Choosing 2,2'-Biphenol vs. Other Phenolic Compounds

    Customers frequently compare 2,2'-Biphenol to mono- or tri-hydroxy benzenes, and for anyone working in synthesis, the unique aspects stand out quickly. Unlike phenol itself, the dimeric bond creates two adjacent phenolic groups that support chelation, cross-linking, and rigid molecular structures. This leads to improved heat resistance, solvent compatibility, and reactivity patterns that favor selective transformations.

    Comparisons with 4,4'-Biphenol come up, too, especially in polymer precursor selection. The ortho connectivity in 2,2'-Biphenol brings spatial orientation that polystyrene or polycarbonate makers look for when tuning chain flexibility or glass transition temperatures. Some competitor products cut costs at the expense of structural fidelity, using recycled streams or bulk oxidants. We’ve taken a different approach: maintaining a single-source benzene line for the precursor, strict in-line filtering, and double-distillation for key reactants.

    Certain applications—metal chelation, ligand synthesis, targeted alkylation—simply work best with 2,2'-Biphenol’s precise geometry. We’ve seen customers face troublesome side reactions or poor yields by choosing other isomers that look similar but perform quite differently under pressure or in harsh solvents. Much of this comes to light during our own in-house pilot tests and through partnerships with university researchers. Armed with those insights, we constantly sharpen our processes to support not just standard applications, but emerging synthetic needs as well.

    The Importance of Reliable Supply and Consistent Quality

    Raw material uncertainty has plagued global chemical markets for years, but it takes on special urgency with compounds like 2,2'-Biphenol. Batch-to-batch differences often deliver hidden costs: yield losses, plant shutdowns, out-of-spec material, or regulatory headaches. By investing in redundant capacity, dual-sourcing of key reagents, and long-term maintenance of reactors and filtration systems, we have seen our risk exposure drop sharply and delivery reliability go up. Years of investing in these areas have built trust that pays off when demand spikes or logistics slow.

    Regular site audits, both internal and by long-standing clients, act as another layer of assurance. Our QC managers run not just lab-verified tests, but also physical checks and walkthroughs to spot process drift before it causes issues downstream. We keep samples archived from every lot—traceable, sealed, and available for cross-check if any concerns surface months later. This traceability goes hand-in-hand with transparent digital reporting, so our partners see the real numbers for every key impurity, rather than canned statements.

    In regulatory environments—pharmaceutical, electronics, and certain adhesives—trace impurity levels must meet evolving standards that often change without much warning. By sticking to a disciplined analytical routine and keeping lines of communication open with our regulatory experts and external labs, we keep both our reputation and our clients’ compliance records clean. This discipline brings peace of mind for customers expecting not just cost-effective supply, but dependable performance batch after batch.

    Process Improvements Built on Experience

    Every year brings a new cycle of refinements as we push for tighter specs and higher output. Some advancements arise from frontline feedback: a partner’s polymer extrusion run comes out cloudy, and a single impurity traced back to one subsection of our process reveals the cause. We make real changes—reactor jacket temperature tweaks, new scrubber installation, or reaction time optimization—based on granular data, not guesswork. The result isn’t just cleaner product, but a more stable operation.

    Ongoing investment in analytical technologies keeps us competitive. Solid-state NMR cuts weeks off of complex structure confirmation, letting us spot shifts in isomer ratios or impurity tails faster. Installation of online chromatographs in both the main plant and packaging lines allows instant binary checks, catching trace solvents before they reach a final drum or carton. These aren’t equipment showpieces but working tools: production chemists and QC staff submit real-time data to cloud dashboards, and shift supervisors can halt a subpar run before it grows into a batch issue.

    Our partner relationships help drive this cycle forward. Researchers pushing into greener chemistry asked for lower chlorinated byproduct levels, so retooling solvent protocols and moving logistics to closed-loop systems cut those residues to barely detectable. Another group, moving to additive-free APIs, wanted finished 2,2'-Biphenol with less than 0.05% ash for direct processing: we changed filtering and dryer settings until we could confidently supply this tighter grade. Such responsiveness keeps innovation flowing, rather than slowing at the supplier gate.

    Environmental Responsibility in 2,2'-Biphenol Production

    The sustainability push in chemistry reaches all corners of the sector, and specialty chemicals like 2,2'-Biphenol are no exception. Our firm approaches environmental management not as a burden, but as part of our technical roots. Closed-loop water systems, solvent recycling, and thermal oxidizer upgrades have moved us measurably closer to zero liquid discharge. By targeting not just big emission sources, but also the small, fugitive organics often overlooked, our plant footprint shrinks year by year.

    Catalyst regeneration stands out as a critical issue. Bimetallic complexes, used in oxidative coupling, can become serious wastes if ignored. We collect and reprocess the spent catalysts through a controlled, documented route, taking pride in recovering both metals and supporting materials. In our experience, such programs not only fulfil regulatory responsibilities, but also cut costs over time by reducing the need for raw imports.

    Packaging waste once represented an afterthought for much of the fine chemical industry. We pivoted: all our drums and liners use recyclable materials, supplied in reusable containers for most local customers. Down the value chain, that step alone lightens landfill pressure. Where possible, we work with R&D partners to trial bulk delivery systems that sidestep single-use plastics entirely.

    Our broader green chemistry approach spills over into formulation. As partners move to solventless production or lower-carbon synthetic pathways, our technical support team adapts—offering adjusted delivery formats or consulting on process compatibility. These successes rarely come from flashy inventions, but rather from persistent monitoring and a willingness to experiment alongside our customers.

    Technical Support and Product Stewardship

    Supplying a fine chemical like 2,2'-Biphenol means engaging beyond the invoice. Technical support calls, troubleshooting formulation hurdles, and walking suppliers through new application protocols all form part of the experience. If a customer faces crystallization issues in large reactors or needs a specific solubility profile, our technical group provides on-site input, not just email answers. These deep dives sharpen our own knowledge and reveal new use-cases that feed back into product development.

    Discussions with formulators often reveal unexpected effects from tiny trace elements or physical parameters like particle shape and flow. For example, controlled pulverization avoids dusting, which improves feeding accuracy and plant hygiene. Achieving a narrow particle size distribution allows smoother dissolution, minimizing waste or clumping in automated dispensing systems. By tuning these physical properties, we’ve helped several polymer plants hit otherwise elusive clarity and strength targets.

    Product stewardship means staying in the loop on downstream uses, monitoring for adverse events, and supporting recalls or corrections where necessary. Collaboration with clients and regulators surfaces user experience that guides future change. We publicly report on these relationships and invest in both staff training and digital platforms for real-time support documentation.

    Looking Forward: 2,2'-Biphenol’s Place in Modern Chemistry

    Research and industry trends point toward continued demand for fine-tuned biphenolic structures as a cornerstone in complex synthesis. Moving beyond legacy applications, we see new inquiries tied to electronics miniaturization, next-generation battery separators, and advanced precursors for sustainable resins. Each of these applications calls for high-purity, predictable material, but also adaptability—something we foster through process agility and close customer contact.

    Close relationships with research institutions and end-users offer opportunities to trial modified versions of 2,2'-Biphenol: custom particle sizes, co-crystallized blends, even feedstocks tailored for continuous-flow reactors. By remaining flexible and prioritizing collaboration, our teams keep pace with new market demands and regulatory benchmarks. That agile mindset keeps this classic building block fresh for emerging applications in energy, mobility, and electronics, as well as the proven strengths it brings to existing industries.

    In short, every shipment of 2,2'-Biphenol represents years of collective problem-solving and chemical expertise. From planning upstream logistics and lab R&D to final supply and application troubleshooting, our entire team stands behind each lot. We look forward to new challenges and the continued evolution of this essential molecule across sectors—and to working with partners who share our belief in chemical craftsmanship, integrity, and progress.