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2-Ethylthiophene

    • Product Name 2-Ethylthiophene
    • Alias 2-Ethylthiofene
    • Einecs 211-509-1
    • 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
    VTB
    Specifications

    HS Code

    605004

    Cas Number 541-50-4
    Molecular Formula C6H8S
    Molar Mass 112.19 g/mol
    Appearance Colorless to pale yellow liquid
    Boiling Point 146-147 °C
    Melting Point -65 °C
    Density 0.986 g/cm³ at 25 °C
    Refractive Index 1.528 at 20 °C
    Flash Point 32 °C (closed cup)
    Solubility In Water Insoluble

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

    Packing & Storage
    Packing Amber glass bottle, 100 mL, tightly sealed with a screw cap. Labeled with chemical name, hazard symbols, and manufacturer's details.
    Shipping 2-Ethylthiophene is shipped in tightly sealed containers under cool, dry conditions, away from sources of ignition. It is classified as a flammable liquid, requiring appropriate labeling and handling in accordance with regulations. Transport must comply with local, national, and international regulations to ensure safe delivery and minimize environmental or health risks.
    Storage 2-Ethylthiophene should be stored in a tightly closed container, in a cool, dry, and well-ventilated area away from sources of ignition. Keep it away from strong oxidizing agents and incompatible substances. Store under inert atmosphere if possible, and protect from light. Proper chemical storage protocols and labeling should be followed to ensure safety and prevent contamination or degradation.
    Application of 2-Ethylthiophene

    Applications of 2-Ethylthiophene in Industrial Manufacturing

    As a direct manufacturer of 2-Ethylthiophene, we supply high-quality material to multiple downstream sectors, supporting stringent production and regulatory requirements across advanced specialty chemical industries. Below we detail select end-use scenarios where our 2-Ethylthiophene integrates uniquely into client manufacturing systems.

    1. Pharmaceutical Intermediate Synthesis for Active Pharmaceutical Ingredients (APIs)

    Global API producers utilize 2-Ethylthiophene as a thiophenic building block in multi-step organic syntheses, enabling the construction of sulfur-containing heterocyclic cores critical for advanced drug molecules. The compound enters during the early-stage coupling or cyclization steps, where precise incorporation is essential to ensure downstream yield and purity. This specialty intermediate supports the creation of targeted small-molecule APIs, primarily within anti-infective and CNS therapeutic pipelines, where regulated impurity profiles and process transparency are mandated throughout production.

    Industry compliance standards

    • ICH Q7 Good Manufacturing Practice for Active Pharmaceutical Ingredients
    • USP/Ph. Eur. monographs (where applicable for related APIs)
    • FDA 21 CFR Part 211 (Current Good Manufacturing Practice for Finished Pharmaceuticals)
    • EHS and REACH safety registration for precursor use

    Typical usage ratio

    • 0.5–3% molar ratio relative to final API target scaffold; precise proportion is defined by API structural requirements and reaction yield optimization during route scouting.

    Downstream process integration

    • Fed into Grignard or Pd-catalyzed step for core heterocycle formation
    • Introduced at the thiophene ring functionalization stage
    • Used as a direct coupling agent in medicinal chemistry scale-up synthesis

    Final product types

    • Intermediates for sulfa drugs and CNS-active compounds
    • Sulfur-containing proprietary pharmaceutical actives
    • Key intermediates for anti-viral pipeline molecules

    2. Electronic Grade Conductive Polymer Precursors

    2-Ethylthiophene supports the specialty electronics sector—particularly manufacturers of organic semiconductors—by serving as a monomer precursor for polythiophene-based conducting polymers. These engineered materials rely on stringent control over isomeric purity and trace metal levels to meet electrical performance demands in optical and flexible display devices. Material supplied directly from our manufacturing site enters oxidative polymerization lines, allowing downstream users to precisely tune polymer chain length, electrical mobility, and solubility for device-grade thin films.

    Industry compliance standards

    • IEC 62321 (Determination of certain substances in electronic equipment)
    • RoHS Directive (2011/65/EU) for restricted substances
    • JEITA regulation for organic semiconductor materials
    • ISO 9001:2015-certified quality control across the polymer synthesis chain

    Typical usage ratio

    • 5–20 mol% as a co-monomer; adjusted for target conductivity, molecular weight, and compatibility with co-monomer blends.

    Downstream process integration

    • Dosed into FeCl3-catalyzed or electrochemical oxidative polymerization column
    • Used during in situ polymer formation on film substrates for printed electronics
    • Fed into batch or continuous reactor modules for conjugated polymerization process

    Final product types

    • Conductive polythiophene coatings
    • Organic thin-film transistors (OTFTs)
    • Flexible touchscreen and OLED display interfaces

    3. Manufacture of Aroma and Flavor Chemicals

    Aroma chemical producers employ 2-Ethylthiophene as a precursor to synthesize high-impact thiophene-derived notes for savory flavor formulations and specialty fragrance bases. Its organosulfur backbone enables the construction of specific odorant molecules that deliver meaty, roasted, or earthy notes required for food-grade or perfumery applications. The raw material is typically converted via selective hydrogenation or alkylation processes under food-approved conditions, with strict in-process monitoring to control residual solvents and by-products, ensuring compliance with global flavor safety regulations.

    Industry compliance standards

    • FEMA GRAS (Flavor and Extract Manufacturers Association, Generally Recognized As Safe list)
    • IFRA Code of Practice (perfume and fragrance industry)
    • EU Regulation 1334/2008 (Flavorings and certain food ingredients)
    • ISO 22000 food safety management compliance for flavor formulation

    Typical usage ratio

    • 0.01–0.2% in final aroma/flavor mixture; modified for olfactive intensity, threshold, and regulatory constraint in end-use markets.

    Downstream process integration

    • Introduced in the thiophene functionalization batch reactor at the precursor step
    • Hydrogenated in catalytic columns for flavor intermediate creation
    • Blended in final olfactory matching tanks for precise aroma balancing

    Final product types

    • Meat and roasted flavor ingredients for prepared foods
    • Sulfur-rich top notes in synthetic perfumery blenders
    • Specialty sulfurous aroma additives for sauces and seasoning compounds

    4. Advanced Agrochemical Active Ingredient Building Block

    Leading agrochemical formulators incorporate 2-Ethylthiophene as a key moiety in the synthesis of heterocyclic pesticide and fungicide active ingredients, valued for its ability to enable selectivity and metabolic stability in field applications. It enters synthetic sequences via targeted thiophene ring construction, supporting the stepwise assembly of patented crop protection molecules. As agrochemical standards demand traceability and strict environmental profile control, downstream manufacturing deploys robust process validation and impurity mapping throughout formulation.

    Industry compliance standards

    • OECD Guidelines for the Testing of Chemicals (GLP environment)
    • FAO/WHO specifications for pesticide active ingredients
    • ISO 9001:2015 quality and traceability standards
    • EU Regulation (EC) No 1107/2009 (placing plant protection products on the market)

    Typical usage ratio

    • 1–6% mole equivalent within crop protection active molecule synthesis, depending on the selectivity and potency requirements of the targeted mode of action.

    Downstream process integration

    • Loaded at the sulfur-containing heterocycle scaffold synthesis stage
    • Processed during nucleophilic substitution or cyclization for structural optimization
    • Applied in the final coupling reactions to complete agrochemical actives

    Final product types

    • Pyridyl- and thiophene-based fungicides
    • Insecticides with aromatic sulfur motifs
    • Active ingredient formulations for broad-spectrum seed treatment agents

    5. Specialty Dye and Pigment Synthesis

    Dye and pigment manufacturers employ 2-Ethylthiophene when synthesizing organic colors found in high-temperature polymers, printing inks, and advanced photographic materials. It serves as a precursor in constructing sulfur-enriched chromophores, imparting enhanced stability and lightfastness—qualities critical where dye degradation must be minimized under harsh processing or end-use conditions. Our material supports continuous-flow or batchwise production routes, ensuring consistent reactivity profiles for scaling colorant batches in compliance with global industry standards.

    Industry compliance standards

    • REACH Regulation (EC) No 1907/2006 (Registration, Evaluation, Authorisation, and Restriction of Chemicals)
    • EN 71-3:2019 Safety of toys – migration of certain elements (relevant for pigment use)
    • ISO 9001 quality management for pigment/dye batch control
    • CFR Title 21 (for food-contact pigment applications)

    Typical usage ratio

    • Typically 2–8% of total chromophore backbone; ratio tailored for color saturation, thermal requirements, and substrate compatibility.

    Downstream process integration

    • Supplied into aromatic coupling or condensed ring-forming stages
    • Blended during continuous or batchwise azo coupling for high-purity dye process
    • Reacted in pilot or commercial-scale pigment manufacturing reactors

    Final product types

    • Heat-resistant synthetic dyes for plastics and fibers
    • Photostable pigments for digital printing applications
    • Sulfur-containing colorants for specialty coatings
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    Certification & Compliance
    More Introduction

    2-Ethylthiophene: From Factory Floor to Functional Chemistry

    Direct From the Chemical Manufacturer’s Line

    Hands stained with the scent of sulfur, we have built our experience batch after batch of 2-Ethylthiophene, shaping it for laboratories and producers from East Asia to the Americas. Our daily work doesn’t hinge on trading platforms or imported barrels; it begins with sourcing the right precursors, purifying each drop of product, troubleshooting reactors, and monitoring purity in real-time. The process shapes our outlook on 2-Ethylthiophene—not just in terms of what the market expects, but in the way it interacts with solvents, catalysts, and end-user processes.

    This compound, bearing the CAS number 612-20-2, has earned its place in the lab through both tradition and adaptability. In our plant, each vessel that produces 2-Ethylthiophene is run to exacting tolerances, with our QA team checking for purity, residual solvents, and trace metals. Almost every batch ships at or above 99% purity. Color, odor, and refractive index are checked right before filling—small details, but anyone who has handled inferior grades knows the headaches a darkened product causes in specialty reactions.

    Making 2-Ethylthiophene: Inside the Production

    Producing 2-Ethylthiophene demands more than just a feedstock and catalyst. Each operator must balance reaction time, temperature, and pressure to avoid overreaction, polymerization, or loss of yield. We work with alkyl halides and thiophene rings, ensuring the ethyl group attaches only at the 2-position. By adjusting the process, we reduce side products like 3-ethylthiophene or more substituted byproducts.

    Our plant’s output isn’t dictated by outside brokers; it’s built on reliability, batch repeatability, and tight quality specs. To minimize environmental impact, we recover solvents and recycle unreacted feedstocks whenever possible. Routine investment in equipment calibration saves customers later trouble with reproducibility in their downstream chemistry. When large pharmaceutical firms set up requalification audits at our site, they ask to see traceability from raw materials through shipping records. We air our SOPs and batch records openly because traceability cuts down sourcing risk up the supply chain.

    Why 2-Ethylthiophene Stands Out in Synthesis

    Among the thiophenes, the 2-ethyl variant brings a balance of volatility and reactivity that benefits fine-chemical and material applications. Regular thiophene lacks the side-group, and when using 3-ethylthiophene instead, regiochemical outcomes often shift—small changes in structure can dictate which intermediates predominate. We solve this challenge by supplying the correct isomer and keeping cross-contamination in the storage tanks at bay.

    The combination of sulfur’s lone pairs and the electron-donating ethyl group affects nucleophilic substitution and electrophilic aromatic substitution reactions. It means that sulfonation, halogenation, and coupling reactions run on 2-Ethylthiophene often show improved selectivity—not as much tar formation, not as many unwanted over-reactions. In the early days of our plant, a chemist pointed out how minor traces of 3-ethylthiophene brought down overall yields in a customer’s catalyst screening; since then, we double-filter for regioisomers, ensuring 2-Ethylthiophene accounts for nearly all product in the drum.

    The End Uses: What Our Customers Build With Our Product

    Practically every season brings new uses for 2-Ethylthiophene. In our experience, the mainstay applications stretch from pharmaceutical intermediate synthesis to the world of electronic materials. One pharmaceutical partner uses it as a building block for CNS-active compounds, where ring substitutions dictate receptor binding. Material science groups request drum after drum for use in conjugated polymers—here, the ethyl group impacts solubility and film morphology without breaking up the conjugation.

    Some customers in dye manufacture prize 2-Ethylthiophene for the way it supports synthesis of high-color-stability pigments. Flavor and fragrance developers experiment with trace-quantity additions to mimic earthy, onion-like odors and to reinforce complex aroma matrices. For every innovator pushing into new segments, we’ve been asked whether product quality changes from batch to batch. Our operators face the reactors head-on, run GC analysis on every lot, and can pinpoint the difference if trace impurities pop up. That discipline spares scale-up engineers repeat surprises down the line.

    Real-World Problems and How We Address Them in Production

    Making specialty chemicals always comes with troubleshooting. Not every batch runs perfectly—a runaway exotherm can create off-spec color, or a valve leak lets in moisture that forms sulfurous byproducts. Our operators stay after hours when these issues show up, cleaning out pipelines, back-flushing heat exchangers, and recalibrating sensors on the spot. Transparency with every quality hiccup allows us to pinpoint where the process showed weakness, retrain staff, and write new procedures. Our customers feel less risk with each purchase because we publish deviation notes and root-cause analyses whenever something goes wrong.

    Supply chain headaches make the headlines, but to us, trouble often starts upstream in precursor supply. The global push for sustainable feedstocks brings periods where raw material sourcing gets restricted. We build redundancy by qualifying two or more vendors for the same precursor, stockpiling in anticipation of storms, trade disputes, and price swings. Over the years, this policy has kept the drums flowing even as other suppliers delay or extend lead times unpredictably.

    Quality Control: Beyond the Numbers

    Analytical chemistry isn’t just a buzzword on our site. Every batch of 2-Ethylthiophene goes through a combination of GC-FID, GC-MS, and sometimes NMR analysis before dispatch. This triple-checking allows us to flag minor contaminants early and react long before product heads out to the loading dock. Our QA team insists on running their own independent checks, never outsourcing analysis to third-parties unless advanced confirmation is needed.

    Years ago, one researcher working on organic photovoltaic materials called our lab to discuss a GC peak they didn’t recognize. Instead of brushing it off, we ran side-by-side samples with our reference materials and uncovered that a new shipment of catalyst had carried over a sulfur impurity. Tightening the input specs and cleaning the reactor resolved it from the next drum. We don’t erase this kind of feedback—it shapes our standard operating procedures and gives our partners confidence to start with our product, not just on day one, but over years of development cycles.

    Differences That Matter: 2-Ethylthiophene Versus Other Products

    Some buyers ask whether the difference between 2-Ethylthiophene and regular thiophene or other alkyl-substituted thiophenes matters at scale. For routine lab-scale work, chemists sometimes swap these isomers. On the industrial floor, the distinctions add up—slight changes in volatility, boiling point, and polarity affect splashing, evaporation losses, and trapping in downstream distillation. 3-Ethylthiophene, for instance, comes with different side reactions in halogenation and functionalization. The ortho substitution at the 2-position changes how the ring behaves when attacked by electrophiles, lowers activation energy for certain coupling reactions, and even alters how the compound blends in multi-component solvent systems.

    Physical handling also varies. Our 2-Ethylthiophene ships as a clear to slightly yellow liquid, mobile and low-viscosity, which stores well under nitrogen without polymerization when handled correctly. Bulk-grade thiophene or heavier substituted variants can darken faster, pick up peroxides in storage, or form tars under heat. Labs using 2-Ethylthiophene for regulated pharmaceutical intermediates prefer it specifically for its clean reaction edges and minimized waste streams in their synthesis. This saves cost at scale—less need for rework, easier purification, and higher throughput.

    Customer Support: More Than a Transaction

    We view every drum as the start of a process rather than a completed sale. This business approach flows from years of fielding urgent calls about late-night laboratory needs, questions on long-term storage, or shipment incidents. Our staff knows the byways of hazardous material logistics, can recommend drum/container types for minimized headspace and optimal stability, and will check weather conditions before shipping to avoid heat spikes that could influence product characteristics.

    Chemists building new processes occasionally request custom specifications or tighter analytical limits. We scale up test batches, document changes, and run full pilot trials before rolling out production. It’s common for us to be dialed into conference calls with process development teams, discussing upcoming regulatory changes, or brainstorming solutions for unique reaction bottlenecks. Our product development and technical support engineers return to the lab themselves, testing modifications, confirming test outcomes, and backing our promises with data, not just brochures.

    Environmental Stewardship: Chemical Production with a Preemptive Eye

    A chemical factory occupies real space in its community, and the legacy we shape depends on the footprint we leave behind. Since 2-Ethylthiophene involves handling sulfur compounds and volatile organics, we focus on emission control and waste minimization at every step. We run fume scrubbers at every vent, capture volatile organics with activated carbon, and recycle as many process solvents as is feasible without risking cross-contamination.

    Regular reports to local authorities cover both actual emissions and reductions achieved year over year. Operators take part in environmental training, learning how small adjustments—timing a vent or recycling purge streams—can prevent incidents. We have reworked flow diagrams to recover partially spent solvents, reducing both purchase costs and environmental burden. Partnerships with local authorities and neighbors keep us grounded and remind us to adapt with both safety and accountability always in mind.

    Looking Ahead: Scalability and Adaptation

    The world keeps moving, and so does demand for 2-Ethylthiophene. New uses in high-end electronics, advanced polymers, and even in agrochemicals spark rounds of process optimization in our plant. Innovation rarely follows a straight path. Our teams huddle over run charts and yield curves, searching for the tweaks in temperature ramps, pressure profiles, or catalyst loads that boost efficiency and quality together. Scale-up brings fresh hurdles from flow-meter glitches to unexpected pump fouling. Operators and chemists troubleshoot together, logging setbacks and drawing on collective memory—sometimes, the fix is the same trick used decades ago, sometimes it comes straight from a new hire.

    Where customers push for greener chemistry, we investigate biobased feedstocks or less energy-intensive process routes. Not every change proves viable at full scale, but every adaptation strengthens future output and reliability. Because we control our process top to bottom, we adjust easily to new purity requirements, packaging forms, or even last-minute delivery routing.

    Transparent Pricing and Lasting Relationships

    Unlike bulk distributors who juggle inventory for margins, we focus pricing on genuine production costs plus a margin for reinvestment in plant upkeep, staff training, and process safety. Volatility in feedstock prices affects us, but we try to buffer shocks for long-term customers by offering rate locks, spot buys, or volume-based rebates where possible. Each year we review contracts transparently, so buyers know where costs rise and fall.

    Trust builds when problems—late shipments, short weights, or product off-specs—are solved quickly and directly. We take responsibility, offer real-time updates, and refund or replace product quickly if we fall short. Partners often stay with us not for deep discounts, but for the knowledge that next shipment, or next year, their needs won’t be shuffled between anonymous exporters or faceless online listings.

    In the Trenches: Industry Trends and Ongoing Challenges

    We track both regulatory changes and scientific advancements. Regional rules over hazardous air pollutants, REACH registration in Europe, or demands for green chemistry from North American and Asian leaders impact both how we produce and how we document. Our compliance specialists maintain up-to-date registration dossiers, tracking formulations, safety data, and shipment histories for auditing.

    The push for lower-waste, higher-efficiency chemistry motivates incremental improvements. Retrofitting process control systems allows us to gather more data at every production step. Optimizing distillation columns, refining feedstock purity, and upgrading analytical methods—these all directly influence how consistent our 2-Ethylthiophene remains across batches, and how easily our partners can scale their own processes.

    Why Source Directly From the Producer?

    Experience producing and shipping this specialty chemical translates to lower risk for end-users. Direct dialogue cuts confusion about specs, avoids the typical middleman markups, and eases troubleshooting if performance dips shift. As manufacturers, we know the quirks of our own product—its handling under real load, storage needs, technical strengths, and practical limits.

    Customers gain access to technical insight, batch-specific data, and troubleshooting recommendations, all based on what we have seen and solved at plant scale. The market rewards this expertise with loyalty and repeat business. Decades spent producing, analyzing, and improving 2-Ethylthiophene confirm that factory-floor insights carry more weight than catalog copy.

    Conclusion: Chemical Craft Rooted in Practice

    Each shipment of 2-Ethylthiophene leaving our site reflects the daily efforts of workers who know both the theory and practice of specialty organic synthesis. Our dedication runs deeper than minimum spec sheets, embracing a philosophy anchored in responsibility, visibility, and technical depth. We continue shaping our output—both in volume and in quality—driven by conversations with chemists, process engineers, and quality managers who rely on practical, proven answers. From raw materials in storage, through reaction, analysis, and shipping, we bring transparency and experience shaped from direct involvement, not just transaction.