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5-Amino-3-Ethyl-1,2,4-Thiadiazole

    • Product Name 5-Amino-3-Ethyl-1,2,4-Thiadiazole
    • Alias 5-Amino-3-ethyl-1,2,4-thiadiazole
    • Einecs 226-679-4
    • 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

    244512

    Chemicalname 5-Amino-3-Ethyl-1,2,4-Thiadiazole
    Molecularformula C4H7N3S
    Molecularweight 129.18 g/mol
    Casnumber 5335-78-2
    Appearance White to pale yellow crystalline powder
    Meltingpoint 159-161°C
    Solubility Slightly soluble in water and most organic solvents
    Purity Typically ≥98%
    Smiles CCn1nc(S)nn1
    Structuralformula C2H5-N=C(N)-N=S-NH2
    Storageconditions Store in a cool, dry place, tightly closed container
    Synonyms 3-Ethyl-1,2,4-thiadiazol-5-amine

    As an accredited 5-Amino-3-Ethyl-1,2,4-Thiadiazole factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.

    Packing & Storage
    Packing White plastic bottle labeled "5-Amino-3-Ethyl-1,2,4-Thiadiazole, 100 grams"; features hazard symbols, lot number, and storage instructions.
    Shipping 5-Amino-3-Ethyl-1,2,4-Thiadiazole is shipped in tightly sealed containers, protected from moisture and direct sunlight. It should be transported according to standard chemical safety regulations, with appropriate hazard labeling. Ensure secure packaging to prevent leaks or spills, and handle with care to avoid exposure. Consult the SDS for specific transport guidelines.
    Storage **Storage for 5-Amino-3-Ethyl-1,2,4-Thiadiazole:** Store in a tightly sealed container, in a cool, dry, and well-ventilated area away from sources of ignition and incompatible substances such as strong oxidizers. Protect from moisture and direct sunlight. Ensure appropriate labeling and avoid contact with skin or eyes. Follow all relevant safety regulations and use personal protective equipment when handling.
    Application of 5-Amino-3-Ethyl-1,2,4-Thiadiazole

    Applications of 5-Amino-3-Ethyl-1,2,4-Thiadiazole in Industrial Manufacturing

    5-Amino-3-Ethyl-1,2,4-Thiadiazole provides high purity and process consistency for specialist chemical manufacturing segments. As the original producer, we serve high-reliability supply chains that require transparent raw material traceability, validated specification support, and customization for technical downstream needs. Below, we detail proven applications in core sectors, with specifics on regulatory environments, practical usage concentrations, production integration, and the types of end products achieved through industrial processes utilizing this material.

    1. Pharmaceutical Intermediate for Cephalosporin Synthesis

    Global cephalosporin API manufacturers use 5-Amino-3-Ethyl-1,2,4-Thiadiazole as a building block in the condensed nucleus preparation of key cephalosporin antibiotic families. The thiadiazole ring structure enables specific substitution patterns required in sidechain construction, directly affecting antibiotic spectrum. Manufacturers incorporate this intermediate during the core skeleton formation prior to side-chain derivatization, optimizing process steps for yield, impurity profile, and compliance with pharmacopoeial standards. Downstream QC teams adjust the input ratio based on real-time reaction monitoring, enabling consistent active content and minimizing API batch deviation.

    Industry compliance standards

    • Current Good Manufacturing Practice (cGMP, 21 CFR Part 210/211, US FDA)
    • European Pharmacopoeia (Ph. Eur.) monographs for β-lactam antibiotics
    • ICH Q7 Guidelines for Active Pharmaceutical Ingredients
    • Chinese Pharmacopoeia (ChP, applicable for domestic cephalosporin production)

    Typical usage ratio

    • 0.8–1.2 molar equivalents relative to the cephalosporin core; adjusted according to specific synthesis route and reaction scale, targeting <5% residual in intermediates based on HPLC process control

    Downstream process integration

    • Directly incorporated at the initial condensation stage after protected β-lactam intermediate is formed; exact point of addition optimized based on solvent system and desired substitution pattern

    Final product types

    • Cephalexin API
    • Cefadroxil API
    • Cefazolin sodium API
    • Other cephalosporin-class drug substances

    2. Crop Protection Synthesis (Fungicide Technical Material)

    Major agrochemical formulators utilize this thiadiazole derivative as a precursor in synthesizing systemic fungicides. The unique electronic properties and functional group reactivity allow for the targeted construction of heterocyclic fungicide scaffolds, with integration at the stage preceding heteroaromatic condensation. Technical production lines maintain traceability through validated batch verification, and adjust feed ratios per the physicochemical requirements of each target active. The final fungicide technical flows to downstream granulation, suspension concentrate, or EC formulation lines prior to global market distribution.

    Industry compliance standards

    • FAO/WHO Specifications for Plant Protection Products (FAO, WHO)
    • ISO 9001 for quality management systems in agrochemical production
    • REACH Registration, Evaluation, Authorisation and Restriction of Chemicals (EU)
    • GB 2763 - National Food Safety Standard for Maximum Residue Limits in Food, China

    Typical usage ratio

    • 0.5–1.0 molar equivalents per target technical structure; ratios may vary for sulfonamide or thioether derivatives, with input selected according to required conversion efficiency and downstream cost control policies

    Downstream process integration

    • Charged at the nucleophilic substitution stage for fungicide core synthesis; follows solution-phase reactions and in situ isolation of technical active ingredient, prior to formulation and quality inspection

    Final product types

    • Systemic fungicide technical concentrates
    • Wettable powder (WP) fungicides
    • Suspension concentrate (SC) fungicides
    • Emulsifiable concentrate (EC) fungicide products

    3. Dye and Pigment Intermediate (Heterocyclic Dye Synthesis)

    Specialty dye manufacturers employ this raw material to form the nitrogen- and sulfur-containing rings integral to several classes of high-performance colorants. Its controlled reactivity supports the synthesis of vivid, stable heterocyclic dyes suitable for polyester, polyamide, and wool substrates. Industrial lines precisely meter the additive based on stoichiometric requirements dictated by batch color consistency standards. The intermediate enters the process during the construction of the chromophore backbone, prior to sulfonation or azo coupling steps. Quality assurance laboratories confirm residue limits and chromophore purity before further blending or granulation into final dye forms.

    Industry compliance standards

    • OEKO-TEX Standard 100 (Global textile and dye safety)
    • ISO 9001/14001 (Quality and environmental management for dye production)
    • REACH Annex XVII (for restricted aromatic amines in dyes, EU)
    • ZDHC MRSL (Zero Discharge of Hazardous Chemicals, Manufacturing Restricted Substances List)

    Typical usage ratio

    • 0.3–0.8 molar equivalents relative to target chromophore; usage refined per intensity/SAM ratio depending on dye class and substrate application requirements

    Downstream process integration

    • Introduced at the cyclization or condensation phase during dye intermediate formation; typically prior to acylation or sulfonation, with residual material removed by extraction and colorimetric QC testing

    Final product types

    • Disperse dyes for polyester fiber
    • Acid dyes for wool and nylon
    • Molecule-based pigments for inkjet inks
    • Specialty dyes for plastics and films

    4. Polymerization Catalyst Modifier (Specialty Polymer Industry)

    Producers of high-performance polymers deploy 5-Amino-3-Ethyl-1,2,4-Thiadiazole as a tailor-made catalyst modifier to influence molecular weight distribution and chain-end functionalities in thiadiazole-modified engineering plastics. The compound is typically introduced as part of a controlled additive package during step-growth or ring-opening polymerizations where nitrogen-sulfur ligation impacts polymer characteristics. Operators track material inflow for every batch, calibrating input within the relevant ratio range to specific process or functional end-use targets, and verify removal or absorption post-polymerization through advanced chromatographic analysis.

    Industry compliance standards

    • ISO 9001 (Quality management for polymer and plastics production)
    • US FDA 21 CFR 177 (Indirect additives used in food contact polymers, for relevant applications)
    • EN 10204 material traceability protocols (Europe)
    • GMP for Industrial Plastics (for pharma/medical-use intermediates)

    Typical usage ratio

    • Typically 0.02–0.2% by weight relative to total monomer feed; dosed according to batch viscosity targets and chain-termination control, with adjustment by real-time viscosity monitoring

    Downstream process integration

    • Added to the polymerization reactor immediately before catalyst addition; the concentration strictly managed by in-process control systems to regulate molecular property endpoints

    Final product types

    • Modified engineering plastics (thiadiazole polyesters, polyamides)
    • Functional polymer composites
    • Polymers for electronic encapsulation
    • High-spec specialty resins
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    Certification & Compliance
    More Introduction

    Introducing 5-Amino-3-Ethyl-1,2,4-Thiadiazole: A Practical Choice in Specialty Intermediates

    Up Close With 5-Amino-3-Ethyl-1,2,4-Thiadiazole

    In the warehouse, racks of finished batches of 5-Amino-3-Ethyl-1,2,4-Thiadiazole sometimes catch the sunlight through the loading bays, glinting off crystal surfaces we know intimately. Each batch forms after hours of multistep synthesis, filtration, and checks, reflecting both skill and meticulous inside-the-plant knowledge. Producing thiadiazoles means handling a class of small molecules with both reactivity and selectivity that have drawn the attention of colleagues in research and production teams alike.

    Handling this compound daily reveals what can only be learned on-the-job: a careful balance of safety and efficiency is crucial. We don’t just look at a code on a drum. We think of the exothermic reactions that launch this aminated thiadiazole from its precursors, the digital pH logs, the acetylation step that smells faintly sharp in the process room, and the way our teams have honed the temperature ramps to avoid charring or side products.

    Why the Amino-Ethyl Thiadiazole Structure Matters

    Technicians and chemists returning from industry tradeshows ask what’s so distinctive about 5-Amino-3-Ethyl-1,2,4-Thiadiazole. We always point out its electron-rich amino group, which can anchor downstream chemistry or act as a building block. The ethyl at position 3 tunes its physical properties, which changes how it dissolves or reacts in a multi-step sequence. We’ve sat in many customer calls talking through syntheses where alternative thiadiazoles stalled at a coupling or didn’t survive hydrolysis. This structure often powers through where others fail.

    There’s more to it than a line structure on a whiteboard. In our process, we control particle size through drying and finishing parameters. If you’re weighing 500 grams in an R&D setting, the last thing you need are clumps or static issues. We have learned to avoid overshooting the drying endpoint — this helps lower dust and maintain batch-to-batch consistency, a detail that saves headaches and costs later in a project.

    Working With the Physical Product

    A drum of 5-Amino-3-Ethyl-1,2,4-Thiadiazole coming off our line delivers a consistently pale, finely divided solid. This isn’t always true elsewhere. Surface moisture, residual solvent, and even the micron-size distribution shift slightly with each run, so we keep a close eye on process analytics. For those re-crystallizing or dissolving the product, the result is less unpredictability and fewer surprises — something any process chemist can appreciate after wrestling with off-spec intermediates from other sources.

    We’ve noticed that solvent compatibility is a regular discussion point, both for synthesis and for downstream formulation. Our product consistently dissolves in polar aprotic solvents and in some lower alcohols, which we verify for each lot. Small differences in moisture or impurity profile can show up during scale-up as out-of-range pH or cloudiness. This experience has taught us to stay rigorous about our solvent recovery and product isolation methods, so those working at the next stage will waste less time adjusting for batch quirks.

    Batch Quality: Beyond the Certificate of Analysis

    Chemical manufacturing lives and dies by data, and a certificate can only tell part of the story. A customer once asked if we could pinpoint why their pilot reactions seemed to work better with our batches than with those from overseas. Looking at our logs, we saw that improved removal of a particular byproduct (traced back to a tweak in our raw material sourcing and purification) led to clearer crystallization and less coloration. We take pride in highly repeatable testing — HPLC purity results always matched, but subtle differences in UV-Vis absorbance revealed what the numbers couldn’t: less degradation and a longer shelf life.

    Starting with raw material choice through final quality testing, teams at our plant use cross-checks between chemical analysis, sensory assessment, and tracked experience. Even though routine checks catch 99% of outliers, it has been that rare outlier — a ghost impurity from a new supplier — that sharpened our focus on incoming inspections. Lab techs flag off-color crystals and use IR to double-check, knowing that minor issues in the intermediate phase can cascade into much larger production headaches down the line.

    Safety, Handling, and Storage Insights

    Those who work on large-scale synthesis quickly find out how physical properties can affect not just yield, but worker safety. Our product is not particularly volatile, nor does it give off acrid vapors under ambient storage — this matters on a busy loading dock. Still, storing it in dry, airtight containers avoids minor clumping or mild caking. In the first years, we had a few lessons in keeping moisture at bay during rainy seasons; desiccants and improved air handling made a visible difference.

    You’ll notice in our plant we use closed transfers and minimized manual handling. Gloves, dust masks, and good ventilation matter for powders of this type, and not just to meet compliance regulations — our own operators rely on it for daily comfort and their skin health. The common mistake new handlers make is neglecting to control airborne particles during dispensing. Working directly with 5-Amino-3-Ethyl-1,2,4-Thiadiazole, we designed dispensing chutes and hoppers that reduce airborne load, protecting not just the operator but the integrity of the material.

    Roles in Downstream Synthesis and Industry Applications

    In the specialty chemicals market, discussions about thiadiazoles often revolve around flexibility and proven results in creating reliable downstream products. We’ve supplied batches for use in pharmaceutical intermediates, photographic chemicals, agricultural testing, and even electronics research. Each sector approaches the molecule with its own goals and constraints.

    Medicinal chemistry teams often lean on our product for its reactivity at the amino group, using it to customize azoles, thioethers, or attach further functional groups. We hear from teams that routinely stress test our material through harsh chlorination or condensation reactions, looking for side-reactions, and noting that the tightly-controlled byproduct profile translates to better yields at later stages.

    Crop protection research has found uses for this molecule in discovery campaigns for lead compounds. The electron-donating amino and thio groups, together with the compact ethyl group, seem to hit a sweet spot for binding and metabolic stability. In technical calls, we’ve walked formulators through our batch profile so they can minimize retesting and speed up regulatory filings.

    Other industrial chemists have explored using 5-Amino-3-Ethyl-1,2,4-Thiadiazole scaffolds in specialty ligands, metal complex catalysis, or polymer materials. From our experience, success in these areas depends not only on the idealized structure, but on the actual batch purity and how finely impurities are controlled. Each large order has driven us to improve both assay specificity and minimize trace inorganic content, as some applications suffer if catalyst poisons slip through.

    Distinctiveness Versus Other Thiadiazoles

    Several customers begin with the question: what sets this molecule apart from other 1,2,4-thiadiazoles? Every structure in this class displays distinctive reactivity based on its substituents. From our perspective as a production team, 5-Amino-3-Ethyl-1,2,4-Thiadiazole’s amino and ethyl groups shift reactivity profiles and physical robustness. The ethyl group, in particular, raises hydrophobicity and shifts melting and solubility ranges, making it more useful where water solubility must be balanced with organic process compatibility.

    Longer-chain or more highly substituted thiadiazoles, for example, tend to exhibit higher melting points, lower solubility, and more sluggish reactivity in N-alkylation or acylation schemes. When comparing purity, finished batches of 5-Amino-3-Ethyl-1,2,4-Thiadiazole show fewer high-boiling impurities and color formers, as we can purify by re-crystallization; bulkier or halogenated analogs often demand additional steps or specialized columns.

    For those blending or formulating with the product, 5-Amino-3-Ethyl-1,2,4-Thiadiazole flows more predictably than the longer-chain or halogenated varieties, saving downstream operations time on both manual and automated equipment. Years of observing unpacking and blending have shown that small differences in static or powder flow grow into substantial operational divergences at scale.

    Supporting Innovation Through Reliable Sourcing

    Our company’s story with this molecule began over a decade ago, supplying small lots to a handful of research clients. Many of those early partners have scaled up their own needs by an order of magnitude, switching from flask batches to full drums, pushing us to refine our process to hit more stringent impurity profiles. As we expanded, custom requests multiplied: alternate particle sizes, specific packaging for automated feeders, custom blending, or detailed trace metals reports.

    Not every batch requirement reaches this level of specificity. Most customers rely on our standard production: a high-purity, dry solid that mixes or dissolves quickly and stores easily. Even so, we keep a robust library of both in-house and customer-led stability studies, shelf-life data, and performance feedback, which helps drive continuous improvement at the plant.

    We’ve learned that technical support means more than just answering questions about melting point or assay percentages. Sometimes, the difference between a successful reaction and a failed one stems from an overlooked handling nuance, such as static mitigation or a recommended minimum dissolution time. Drawing from thousands of shipments and customer case studies, we’ve crafted handling bulletins and add them to each drum, based on lessons from the field.

    Responsiveness in a Shifting Supply Environment

    The broader chemical supply chain has become more volatile and interconnected. When a hurricane or transport disruption slows raw material delivery, our process flexibility becomes critical. Sustaining uninterrupted production for this intermediate demands not just careful procurement, but backup supplier arrangements, close partnerships with logistics teams, and a deeply-resourced inventory of core reagents.

    During periods of scarcity in aromatic amines or solvents, our plant runs double shifts and explores alternate routing, all designed to avoid passing delays onto customers. We invest in process risk assessments and rapid adjustments when global dynamics, like regulatory shifts or environmental clauses, create bumps in standard operating procedures. Through these years, reliability has relied on both old-fashioned hands-on troubleshooting and digital tools, like real-time supply dashboards.

    Our on-site labs keep a close watch on each batch, not just for routine compliance, but also to anticipate changes in customers’ process requirements or new regulatory limits. Collaboration with downstream partners has pushed us to install new analytics: ultra-trace metals screening, additional thermal stability testing, or tracking emerging impurity standards. By aligning plant and lab operations with what customers observe in their own processes, we stay responsive and reduce downstream surprises.

    Addressing Quality Challenges and Process Optimization

    Every chemical process brings its own stubborn problems. For 5-Amino-3-Ethyl-1,2,4-Thiadiazole, some of the biggest pain points have centered on keeping hydrolytic byproducts and trace alkali metals to a minimum, especially for pharmaceutical or electronic applications. Years ago, we introduced new filtration equipment — not just a tighter pore size, but continuous monitoring of filter performance — which resulted in a noticeable decrease in batch rejections and clearer product transparency.

    Temperature control during synthesis has proven vital. Running too hot or too cold throws off the reaction selectivity, producing a colored impurity that’s tough to expunge at recrystallization. We rely on automated sensors, but we also trust operator experience — quick corrections from the plant floor often nip incipient problems before they mushroom into days-long shutdowns.

    Sampling protocols have also evolved. Now, quality control pulls from both the top and the base of each drum and correlates with process records, giving our analytical chemists a broader set of data to track minor trends. We share these findings during regular internal reviews and update our reference standards, applying what we learn to future production cycles.

    From Production Floor to End Application: Learning From Experience

    Stories from our own facility shape our advice to end users. In the early days, packaging issues cropped up, with static buildup leading to messy transfers and lost product. Now, conductive liners and anti-static grounding on hoppers have resolved these frustrations. Similar improvements include using high-density screw caps and triple-seal closures during humid months, based on real-world observations rather than just theory.

    Interacting with customers across the spectrum — from bench chemists trialing a few grams to process engineers validating tons — has kept our view both practical and flexible. As feedback returns, we notice patterns: older packaging sometimes left powder slightly yellowed after a year in warehouse conditions, so we reformulated the packaging film; a pharma client observed sporadic clumping, so we doubled down on our drying curve end-point.

    Such practical knowledge does not appear on typical data sheets, but it shapes both our internal SOPs and our external support. This learning environment builds deeper trust with customers, who then are more willing to share their own challenges. In some cases, joint troubleshooting has solved stubborn formulation or storage quirks, returning value to both plant and customer.

    The Road Ahead: Supporting Future Developments in Specialty Chemistry

    The world of specialty chemicals doesn’t stand still. As we look toward future applications — whether in fine chemicals, new pharmaceuticals, or technical materials — the performance and reliability of intermediates like 5-Amino-3-Ethyl-1,2,4-Thiadiazole take on growing importance. We continue to invest in analytical improvements and process robustness, driven by both customer needs and regulatory evolution.

    As research groups push this compound into new synthetic pathways, our support evolves as well: alternate purities for crystallization seeding, specialized testing for trace organics, and rapid-response sampling on pilot lots. Open communication with the plant floor enables those who formulate, test, and scale up new ideas to count on a product that won’t trip up the process at a critical juncture.

    After years of working hands-on, we know the true value of 5-Amino-3-Ethyl-1,2,4-Thiadiazole starts well before the molecule reaches the next step on the bench or in the reactor. From careful synthesis control, thoughtful packaging, and targeted technical support, our approach keeps day-to-day chemistry practical, predictable, and ready for the challenges ahead.