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2-Amino-4,5-Dimethyl-Thiophene-3-Carboxylic Acid Methyl Ester

    • Product Name 2-Amino-4,5-Dimethyl-Thiophene-3-Carboxylic Acid Methyl Ester
    • Alias 2-amino-4,5-dimethyl-3-thiophenecarboxylic acid methyl ester
    • Einecs 68218-67-1
    • Mininmum Order 1 g
    • Factory Site Tengfei Creation Center,55 Jiangjun Avenue, Jiangning District,Nanjing
    • Price Inquiry sales7@sinochem-nanjing.com
    • Manufacturer Sinochem Nanjing Corporation
    • CONTACT NOW
    VTB
    Specifications

    HS Code

    170225

    Chemical Name 2-Amino-4,5-Dimethyl-Thiophene-3-Carboxylic Acid Methyl Ester
    Molecular Formula C8H11NO2S
    Molecular Weight 185.24 g/mol
    Cas Number 67665-10-1
    Appearance Yellow to brown solid
    Purity Typically ≥98%
    Melting Point Approximately 94-97°C
    Solubility Soluble in organic solvents such as ethanol, DMSO, and methanol
    Structure Thiophene ring substituted at positions 2 (amino), 3 (methyl ester carboxylic acid), 4 and 5 (methyl groups)

    As an accredited 2-Amino-4,5-Dimethyl-Thiophene-3-Carboxylic Acid Methyl Ester factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.

    Packing & Storage
    Packing The chemical is packaged in a 25-gram amber glass bottle, tightly sealed, and clearly labeled with product name, purity, and hazard information.
    Shipping 2-Amino-4,5-Dimethyl-Thiophene-3-Carboxylic Acid Methyl Ester is securely shipped in sealed, chemically-resistant containers to prevent contamination and moisture exposure. Standard shipping complies with chemical safety regulations, including appropriate labeling and documentation. Temperature-sensitive handling and prompt delivery ensure the compound’s integrity during transit. Shipping is available internationally, adhering to all relevant regulatory guidelines.
    Storage Store **2-Amino-4,5-Dimethyl-Thiophene-3-Carboxylic Acid Methyl Ester** in a tightly sealed container, protected from moisture and light, in a cool, dry, and well-ventilated area. Keep away from incompatible substances such as strong oxidizers and acids. Recommended storage temperature is 2–8°C (refrigerator). Clearly label the container and handle using standard laboratory safety practices to prevent contamination and degradation.
    Application of 2-Amino-4,5-Dimethyl-Thiophene-3-Carboxylic Acid Methyl Ester

    Applications of 2-Amino-4,5-Dimethyl-Thiophene-3-Carboxylic Acid Methyl Ester in Industrial Manufacturing

    As a direct manufacturer of 2-Amino-4,5-Dimethyl-Thiophene-3-Carboxylic Acid Methyl Ester, we focus on serving industries with precise, consistent quality for demanding synthesis, particularly in pharmaceutical and specialty chemical downstream fields. Below, we present established application areas and industrial specifications reflecting real-world manufacturing environments.

    1. Pharmaceutical Intermediates for Antithrombotic Drug Synthesis

    Many pharmaceutical companies utilize this compound as a core intermediate in the multi-step synthesis of specific antithrombotic agents, particularly for making thiophene-based active pharmaceutical ingredients (APIs) targeting cardiovascular indications. Our material enters downstream at the condensation and cyclization stage, where its purity and methyl ester protection ensure high-yield transformation with minimal byproduct load in subsequent structure-building steps. Suppliers monitor for residual solvent and related compound profiles as demanded by drug master file (DMF) submissions.

    Industry compliance standards

    • ICH Q7: Good Manufacturing Practice for Active Pharmaceutical Ingredients
    • EU GMP Parts I & II
    • USP <661>, USP <231>, and related pharmacopeial chemical standards
    • FDA 21 CFR Part 211 (Quality Systems & Chemical Controls)

    Typical usage ratio

    • 0.8 – 1.2 molar equivalents as dictated by API synthesis stoichiometry; adjusted based on impurity control and catalyst efficiencies

    Downstream process integration

    • Charge directly into condensation reactor following pre-purification; undergoes methyl ester deprotection and cyclization under controlled pH and temperature before downstream purification

    Final product types

    • Active pharmaceutical ingredients (APIs) for antithrombotic tablets and injectables
    • Bulk intermediates for continued syntheses in cardiovascular drug lines
    • Reference standards for pharmaceutical QC labs

    2. Agrochemical Intermediate in Triazole Fungicide Synthesis

    A number of leading agrochemical manufacturers specify this compound in the construction of 3-carboxylic acid–derived triazole frameworks, which appear in modern broad-spectrum fungicide actives. Our material supports key ring-construction reactions, with stringent specification for residual sulfur-containing byproducts to comply with global crop protection regulations and QC lot release for downstream blending into technical-grade actives and finished formulations.

    Industry compliance standards

    • ISO 9001:2015 Quality Management Systems
    • FAO/WHO Specifications for Plant Protection Products
    • REACH Regulation (EC) No. 1907/2006
    • China GB 2763: Maximum Residue Limits for Pesticides

    Typical usage ratio

    • 0.5–1.0% w/w in triazole precursor coupling steps, adjusted for batch size and target Fungicide Dose

    Downstream process integration

    • Added during heterocycle formation following raw material dissolution; proceeds through chlorination or alkylation prior to isolation and formulation blending

    Final product types

    • Technical-grade triazole fungicide actives
    • Emulsifiable concentrates for spray applications
    • Granular and suspension concentrate pesticide formulations

    3. Fine Chemicals — Synthesis of Advanced Dyestuff Intermediates

    This building block finds regular use in the design of sulfur-heterocyclic colorants for high-value dyestuffs, especially those deployed in electronic or specialty fiber applications. Downstream users often require batch certification for residual amines and sulfide levels to ensure color stability in end-use polymers and resist fading under UV or chemical exposure. Manufacturers incorporate our ester at the nucleophilic aromatic substitution stage for increased process economy and ease of conjugation in dye molecule assembly.

    Industry compliance standards

    • OEKO-TEX® Standard 100 for textile applications
    • EN 71-3:2019 (Safety of Toys – migration of certain elements)
    • ISO 9001:2015 process certification
    • REACH SVHC (Substances of Very High Concern) compliance for export markets

    Typical usage ratio

    • 1.5–4% w/w within intermediate syntheses; adjusted according to target chromophore formation and desired dye yield

    Downstream process integration

    • Charged during nucleophilic aromatic introduction; conversion efficiency tracked via HPLC prior to downstream condensation or sulfonation steps

    Final product types

    • Sulfur-based dyestuffs for polyester and polyamide fibers
    • Organic pigment intermediates for inkjet and digital printing
    • Colorant preblends for engineering plastics

    4. Electronic Chemicals — Precursor for Organic Semiconductor Materials

    Our material serves as a core precursor in the synthesis of thiophene-based electron donor and acceptor molecules required for advanced organic semiconductors, including those for organic field-effect transistors (OFETs) and flexible display technologies. Downstream integration prioritizes high chemical purity, low trace metal contamination, and strict specification on moisture content, since performance depends on batch consistency at the molecular level for device fabrication.

    Industry compliance standards

    • JEITA standards for electronics chemicals
    • ISO 9001:2015 and ISO 14001:2015 for process and environmental stewardship
    • RoHS (Restriction of Hazardous Substances Directive) for finished electronic devices
    • SEMATECH purity guidelines for organic semiconductors

    Typical usage ratio

    • 0.2–0.5 molar equivalents in key precursor coupling; optimized according to desired thin film properties and yield

    Downstream process integration

    • Introduced at the aryl–thiophene coupling and methylation steps; follows vacuum drying and high-purity recrystallization before blend into organic semiconductor masterbatches

    Final product types

    • Organic semiconductor layers for OFETs and OLED displays
    • Photoactive donor–acceptor copolymers for flexible electronics
    • Printable electronic inks and coatings for sensor arrays
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    Certification & Compliance
    More Introduction

    2-Amino-4,5-Dimethyl-Thiophene-3-Carboxylic Acid Methyl Ester: Real-World Insights from the Production Floor

    All the talk of specialized chemicals often gets bogged down in buzzwords and marketing phrases. Cutting to the chase, making 2-Amino-4,5-Dimethyl-Thiophene-3-Carboxylic Acid Methyl Ester calls for a blend of chemical know-how, attention to purity, and equipment that stands up to rigorous daily use. Folks in synthesis labs know that even a tiny variation in feedstock or process can throw off the entire batch, so the consistency in this product means a lot to people depending on clean, reliable results.

    Product Snapshot: Hands-On Manufacturing Experience

    At our plant, we see the journey of this compound from raw feedstock to a fine, white-to-light yellow powder that leaves the reactors in a controlled, dust-free environment. The model referenced most often in lab requests and orders from pharmaceutical and agrochemical researchers hovers around high-purity, low-moisture variants. Specifications here aren’t just numbers on a sheet—they represent daily checks with gas chromatography, melting point assessments, and frequent TLC analysis. If a batch doesn't meet the expected purity benchmark, it gets pulled, plain and simple.

    Our team manages the reaction between the 2-Amino-4,5-Dimethyl-Thiophene ring and methylation agents in an environment where cross-contamination poses a risk to finished purity. We see requests for smaller, precision batches more than industrial-scale orders; research labs and pilot plants watch every decimal of their input. By limiting exposure to moisture and storing under nitrogen, we keep degradation at bay.

    End-Use Applications: Tied to Experience, Not Hype

    Researchers and formulation chemists reach for 2-Amino-4,5-Dimethyl-Thiophene-3-Carboxylic Acid Methyl Ester when aiming for selectivity and reproducibility in creating active intermediates for new drugs or specialized pesticides. On the synthesis line, we see how a slight ring alteration or drift in the carboxylic acid group directly impacts the reactivity and usefulness of the final molecules. The methyl ester format responds smoothly in further transformations; it’s a building block, not burdened by excessive side reactions.

    Some colleagues across pharmaceutical development prefer this compound’s stability over the free acid form, as the methyl ester withstands storage, humidity swings, and the rigors of scale-up without rapid hydrolysis. In practical terms, this trimethylated thiophene supports downstream amide formation and acts as a robust starting material for heterocyclic expansions. When researchers talk about finding a pathway with minimal protection/deprotection steps, our hands-on experience matches their goals—each minimized step means real savings in time and fewer batch errors.

    Comparisons: Standing Apart on the Shop Floor

    2-Amino-4,5-Dimethyl-Thiophene-3-Carboxylic Acid Methyl Ester isn’t the only thiophene on the circuit, but it brings particular advantages during practical synthesis. Bench chemists spot the difference straightaway. Some competitive intermediates, for example, suffer from erratic melting points or develop color impurities after just weeks on the shelf. Our methyl ester version maintains a clean appearance after repeated quality checks, which reassures those running high-throughput reaction screens.

    Over the years, we’ve run head-to-head tests in our QA lab: the methyl ester’s stability outperforms corresponding free acids or ethyl esters in both lab storage and actual synthetic reactions. By using a dialed-in purification step after methylation, our output avoids the faint sulfurous residues that can compromise product performance down the line. These hands-on lessons reinforce that even small tweaks in our process—like exchanging solvents or finetuning drying—produce observable improvements in downstream applications.

    Operational Needs and Scale-Up Experience

    Scaling this molecule up takes more than just bigger vessels. Reaction exotherms demand constant temperature monitoring, and any lapse in agitation can create hot spots, affecting color and purity. In our production halls, each run involves a checklist: impeller rates, extraction solvents, and even the glassware material get attention to avoid contamination. Later, after the synthesis wraps, the filtration and vacuum drying steps remove residual solvents efficiently. We keep our solvent recovery system humming, since methylating agents and solvents need careful recycling—economic and environmental savings add up across months of production.

    Purification uses a series of solvent washes that the R&D team has adjusted over the years. The goal—achieving a dry, non-clumping powder—means controlling humidity in the packaging room and sealing drums nitrogen-purged before shipping. Sometimes, direct lab collaborations with institutions guide tweaks to particle size or flowability, based on specific feedback. Each adjustment on our side, from raw input monitoring to packaging changes, is grounded in meeting those researchers’ needs, not generic specifications.

    Why Purity and Transparency Matter—On the Factory Floor

    Anyone in chemical production can churn out a material that passes broad-brush assays. The difference between a passable product and one trusted by demanding synthesis labs comes down to transparency in reporting and backing up every batch with real data. We don’t just slap a certificate onto outgoing shipments; behind each number is a set of records, tied to individual QA engineers and instrument logs. Every time a client flags a concern with solubility or color, we invite them to walk the plant, review chromatography readouts, and inspect storage conditions.

    It’s a headache to face a rejected batch, but direct feedback lets us close the gap in process control. After a persistent complaint from a university customer about non-reproducible NMR peaks, we dug into the glassware cleaning regimen and found a micro-residue issue that QC missed. Tracking these issues in production real-time, then working fixes into the standard operating procedures, keeps the loop tight between lab requirements and shop floor action. Reliability doesn’t come through hope; it requires this relentless, on-the-ground vigilance.

    Health, Safety, and Industry Realities

    Those working on the manufacturing side know process safety isn’t just policy language—every drum, every valve flange, and every distillation setup can cause real harm if handled wrong. We keep our eyes on methylation runs, using double containment and continuous gas monitoring, especially due to the volatility of starting fluids. The thiophene ring’s sulfur odor acts as both a nuisance and a helpful early warning in the air.

    To minimize personnel exposure, we’ve invested in automation for weighing and transfer. Our teams wear full PPE, but more effective than gear is designing the line to eliminate human interaction with open compounds. Colleagues on the maintenance side regularly inspect seals, exchangers, and pressure reliefs. We map out spill scenarios during each shift, not once a year. These are the routines built through near misses and the lessons absorbed from older, less automated plants.

    Safety doesn’t stop at the plant gate. We encourage customers to review our storage advice—not because it’s legal boilerplate, but from the reality of seeing substandard storage causing product clumping or degradation. Knowing how to store and handle the methyl ester form leads to reliable research results, not headaches or re-runs.

    Regulatory Demands and Traceability in Every Batch

    Every kilogram of 2-Amino-4,5-Dimethyl-Thiophene-3-Carboxylic Acid Methyl Ester must be traced from raw input to final shipping. Compliance isn’t just about ticking off audit boxes; auditors dig deep into solvent inventories, batch processing logs, and emissions records. Over the years, we moved toward digital documentation, where a batch number pulls up a living record of every step, correction, or deviation logged.

    Customers, especially those in regulated pharma sectors, want proof that what arrives matches the lab records—no substitutions, no mislabeling. We retain reference samples well past the usual shelf life, so investigations into out-of-spec results or difficult synthetic intermediates go faster and smoother. That chain of custody prevents small slips escalating into regulatory fines or recalls.

    From our vantage point, keeping a tight grip on documentation isn’t just about audits. It means any team member, from line chemist to top management, can answer questions on recalls or unusual impurity findings. Being able to pull up the history of a drum or a drum’s siblings helps protect our customers’ research timelines and their trust in the final material.

    Sustainability: Direct Steps, Not Just Promises

    The chemicals industry wrestles with waste and energy issues, and our thiophene production line is no different. Over the years, we’ve targeted solvent recovery as a starting point for efficiency gains. By monitoring distillation cuts and recycling nearly 80% of the methylating agent solvents, we’ve cut down both input costs and hazardous waste. Energy use comes in for a close second—we review insulation on reactors and switch to energy-saving drives on mixers.

    Waste management used to be about regulatory compliance. That shifted once local partners began demanding a full lifecycle view—asking us where waste byproducts go, and how biotreatment stacks up to incineration. By engaging with local waste processors and investing in on-site neutralization, we’ve moved beyond “disposal” to actual accountability. Staff on the floor regularly suggest tweaks in dosage to minimize off-spec material, closing the gap between theory and day-to-day environmental improvement.

    Our CO2 tracking and reporting system now logs environmental metrics for each batch, and we share this data directly with partners on request. Sometimes, seeing the numbers laid out in black and white sparks meaningful improvements—process engineers find another valve to insulate, or an operator suggests swapping reagent handling bags for durable containers.

    Tackling Technical Problems Hands-On

    In chemical manufacturing, even a well-run line hits snags. The methyl ester sometimes crystallizes in unexpected ways, especially at the start of winter or during periods of high humidity. Years ago, a batch shifted color and drew complaints from a research partner. Instead of hiding behind standard answers, we opened up the batch records, flagged the root problem—an unnoticed shift in brine tank temperature—and added new sensors to our process line.

    Feedback loops don’t always come from formal complaints. Sometimes, a sharp-eyed technician notes a subtle drop in powder flow during packaging or a faint sulfur smell during transfer. Instead of brushing these aside, we’ve learned to record each observation and raise process reviews when patterns emerge. Live, honest feedback builds a line that gets better, not stale.

    Real-World R&D: Teamwork Matters More than Silver Bullets

    Partnerships with research institutions teach us things daily. Requests for tighter particle distribution, better flow in automated dispensers, and higher purity in new catalytic reactions drive us to tweak processes. Each trial means working out the kinks: running smaller pilot batches, reviewing sample shipment logs, and opening up lab and plant for direct visits. As a manufacturer, keeping lines of communication open with user labs cuts down on mix-ups, keeps our focus on what matters, and brings out practical creativity for solving day-to-day hitches.

    In the cyclical world of chemical research and production, demand for 2-Amino-4,5-Dimethyl-Thiophene-3-Carboxylic Acid Methyl Ester moves in step with breakthroughs in drug and agrochemical fields. We brace for spikes by preparing flexible shift patterns, and control slowdowns by running preventive maintenance and process improvements during dips. It’s a routine that only comes with years on the ground and attention to the changing rhythms of research trends.

    Differences That Don’t Hide in the Details

    Some say chemicals are commodities—you pick one from a catalog, and they all behave. The reality isn’t so simple. From our end, a change in drying time, a tweak in methylating agent, or a new source of starting thiophene can mean months of process tuning to stabilize output. The product’s ease of downstream transformation, resistance to hydrolysis, and shelf stability make it stand out for researchers and process chemists who want to avoid the frustration of batch-to-batch surprises or downstream troubleshooting.

    Customers circle back to us not only for analytical performance, but because the product maintains its clean appearance and physical integrity shipment after shipment. We tackle requests for transparency with lab tours, document dumps, and real-time process walks, not canned answers. This openness lets our partners in the lab see us as allies, not unknowns behind a catalog number.

    Looking Ahead: Challenges and Pathways Forward

    We see every new use case, every field test, as a backyard for fresh technical questions about 2-Amino-4,5-Dimethyl-Thiophene-3-Carboxylic Acid Methyl Ester. New demands on purity, tighter environmental controls, and changing regulatory landscapes mean no standing still. The team prepares for these by sharing insights between production and development groups—catching emerging supply chain risks, planning for greener process alternatives, and piloting digital tracking for new compliance regimes.

    Our ambitions go beyond just filling orders. We want to make a product that not only meets specs today but keeps pace with tomorrow’s tighter purity needs and stricter environmental goals. The lessons from our past—batches lost to humidity, lessons logged from customer feedback, process shifts prompted by environmental audits—drive our improvement plans. Our pride comes from the close integration between our factory routines and the day-to-day reality of the labs using our product.

    A Chemist’s Product, Built on Factory Experience

    2-Amino-4,5-Dimethyl-Thiophene-3-Carboxylic Acid Methyl Ester isn’t just a string of syllables or another chemical in a catalog. From synthesis and purification to QA, scale-up, and end use, it’s the outcome of thousands of decisions by people who see, test, and challenge the product every day. For users in research, pharmaceutical trials, or pilot plant expansions, our team’s commitment to real-world transparency, responsiveness, and continuous learning shapes not just today’s batch—but the next innovation their work unlocks.