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2-Thiohydantoin

    • Product Name 2-Thiohydantoin
    • Alias 2-Thioxoimidazolidin-4-one
    • Einecs 206-127-3
    • 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

    488703

    Iupac Name 2-sulfanylimidazolidine-2,4-dione
    Cas Number 497-18-7
    Molecular Formula C3H4N2O2S
    Molar Mass 132.14 g/mol
    Appearance White to off-white crystalline powder
    Melting Point 212-215 °C
    Solubility In Water Slightly soluble
    Boiling Point Decomposes
    Density 1.52 g/cm³
    Smiles C1C(=O)NC(=O)S1

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

    Packing & Storage
    Packing 2-Thiohydantoin is packaged in a sealed, amber glass bottle containing 100 grams, labeled with hazard warnings and product identification.
    Shipping 2-Thiohydantoin is shipped in tightly sealed containers to prevent moisture uptake and contamination. It is classified as a non-hazardous material for transport, but should be handled with care. Packages are labeled according to regulatory guidelines and shipped at ambient temperature unless otherwise specified by the manufacturer’s safety data sheet (SDS).
    Storage 2-Thiohydantoin should be stored in a tightly closed container, in a cool, dry, and well-ventilated area. Protect it from moisture, heat, and incompatible substances such as strong oxidizers. Keep the storage area away from sources of ignition and out of direct sunlight. Proper labeling and secure storage are essential to prevent accidental exposure and ensure safe handling.
    Application of 2-Thiohydantoin

    Applications of 2-Thiohydantoin in Industrial Manufacturing

    As an experienced chemical manufacturer, we supply 2-Thiohydantoin for highly regulated industries that demand consistent quality and clear application protocols. Below are the industrial segments where this compound plays a critical role, detailed with compliance, processing, and finished product specifics based on real-world manufacturing standards.

    1. Pharmaceutical Intermediate Synthesis

    2-Thiohydantoin serves as a key heterocyclic building block in the synthesis of active pharmaceutical ingredients, especially for developing antihypertensive agents, anti-inflammatory medicines, and certain anticancer drugs. Research-based and commercial batch processes use it to introduce thio functional groups into intricate organic molecules. Formulation engineers carefully control the reaction stoichiometry to minimize impurities and meet target purity profiles for downstream active intermediates.

    Industry compliance standards

    • ICH Q7 Good Manufacturing Practice for Active Pharmaceutical Ingredients
    • United States Pharmacopeia (USP) monographs for related APIs
    • European Pharmacopeia (Ph. Eur.) APIs specifications where applicable
    • FDA 21 CFR Part 211 Current Good Manufacturing Practice

    Typical usage ratio

    • Used between 0.1–1.5 equivalents relative to key reactant, adjusted according to the target API synthetic pathway and stage yield optimization

    Downstream process integration

    • Charged during cyclization steps or nucleophilic substitution in API synthesis, typically following preliminary condensation
    • Integrated into 5- or 6-membered ring formation under controlled temperature and solvent conditions
    • Monitored for conversion completion before workup and isolation steps

    Final product types

    • Thiohydantoin-based antihypertensive intermediates
    • Precursors to anti-inflammatory pharmaceuticals
    • Building blocks for oncology drug APIs containing thiohydantoin moieties

    2. Agrochemical Active Ingredient Base

    Crop protection formulators utilize 2-Thiohydantoin as a core structure for synthesizing modern fungicides and insecticides. Its incorporation helps achieve targeted pest control with tailored bioactivity. Downstream producers select batch or continuous process methods depending on production scale, while quality assurance teams validate levels of unreacted residue to comply with residue and toxicity standards set by regulators.

    Industry compliance standards

    • FAO/WHO Specifications and Evaluations for Plant Protection Products
    • EPA Federal Insecticide, Fungicide, and Rodenticide Act (FIFRA) compliance for US markets
    • REACH (EC No 1907/2006) Registration for substance safety assessment in Europe
    • Chinese GB/T quality standards for pesticide raw materials

    Typical usage ratio

    • Ranges from 0.5%–4% in initial synthesis steps, depending on target molecule complexity and desired yield

    Downstream process integration

    • Fed into reaction vessel for base ring construction or sulfur atom introduction
    • Used in first- or second-stage chemistry for backbone assembly of active substances
    • Processed under closed systems to control emissions during thionation or condensation phases

    Final product types

    • Systemic fungicide actives (e.g., thiohydantoin derivatives for cereal crop protection)
    • Custom-formulated insecticidal actives for field crop applications
    • Intermediates for biocide synthesis in seed treatment products

    3. Specialty Rubber Accelerator Synthesis

    Rubber compounders utilize 2-Thiohydantoin to prepare specialized accelerators that regulate vulcanization timing and crosslink density in both NR and SBR-based products. Process technicians must maintain strict batch ratios and temperature profiles to ensure uniform accelerator distribution and prevent incomplete vulcanization, impacting mechanical strength and aging resistance of final rubber goods.

    Industry compliance standards

    • ASTM D4670 Standard Specification for Rubber Compounding Materials—Accelerators
    • ISO 9001:2015 Quality Management Systems for compounder certification
    • European Union REACH Annex XVII compliance for restricted substances
    • Regulations (EU) No 10/2011 on plastic materials and articles intended to come into contact with food (for food-contact rubber)

    Typical usage ratio

    • Between 0.3–1.0% by weight of rubber masterbatch; ratio fine-tuned per application performance and required cure rates

    Downstream process integration

    • Added during initial mixing of rubber, fillers, and other additives in internal mixers or open mills
    • Dispersed evenly before vulcanization phase under controlled temperature and mixing speed
    • Monitored by QC for final consistency and accelerator reactivity prior to molding or extrusion steps

    Final product types

    • High-performance industrial rubber seals and gaskets
    • Automotive vibration damping parts
    • Technical conveyor belts and roller coverings

    4. Dye and Pigment Intermediate Processing

    Manufacturers in the dye industry incorporate 2-Thiohydantoin as a precursor in synthesizing sulfur-containing chromophores used in specialty dyes for polyester and polyamide fibers. Chemists in pigment plants adjust the addition schedule and reaction monitoring systems to achieve high chroma and migration-resistant color performance. Each batch undergoes rigorous analytical verification for residual thiohydantoin and color fastness test panels.

    Industry compliance standards

    • OEKO-TEX Standard 100 for restricted substance compliance in textile applications
    • EN 71-3:2019 Safety of Toys—Migration of Certain Elements (for pigments in toys)
    • ISO 9001:2015 Quality Management Systems for manufacturing traceability
    • ISO 14001:2015 Environmental Management Systems for effluent handling

    Typical usage ratio

    • Used at 1–8 mol% depending on the batch size and targeted chromophore output; adjusted according to dye strength required

    Downstream process integration

    • Charged during nucleophilic substitution or thionation in the synthesis route to dye precursors
    • Mixed in with bridging agents for pigment synthesis and subjected to further condensation or oxidation
    • Controlled heating and agitation parameters for maximum color yield and purity

    Final product types

    • Sulfur-dye intermediates for polyester and nylon textiles
    • Pigment bases for high-fastness plastic coloring
    • Specialty organic dyes for industrial textile printing

    5. Fine Chemical Derivatives in Laboratory Reagents

    Producers of analytical chemistry reagents and reference standards integrate 2-Thiohydantoin for the synthesis of derivatization agents and calibration substances. Laboratory-scale and pilot plant facilities calibrate reaction scales and purification steps to minimize byproducts, providing high-grade intermediates for use in method validation and chemical research. Attention to trace level residuals and documentation forms a core part of their quality release.

    Industry compliance standards

    • ISO/IEC 17025 General Requirements for the Competence of Testing and Calibration Laboratories
    • ACS Reagent Chemical Standards (American Chemical Society)
    • EU Chemicals Agency (ECHA) safety data and REACH compliance for laboratory chemicals
    • Relevant GHS labeling guidelines for safe handling

    Typical usage ratio

    • Adjustment from 98% to 100% assay as supplied for derivative reagent production; exact mass used per standard formulation protocol

    Downstream process integration

    • Dosed directly to synthesis reactors in preparative or analytical chemistry labs
    • Subjected to purification by crystallization or chromatography before final packaging
    • Quality checked for identity, purity, and stability prior to release

    Final product types

    • Nucleophilic derivatization agents for peptide analysis
    • Chemical calibrants for instrument standardization in HPLC/GC/MS
    • Custom reagents for university and industrial research laboratories
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    Certification & Compliance
    More Introduction

    2-Thiohydantoin: A Foundation for Synthesis and Innovation

    Every day in our plant, we see the care and discipline our teams dedicate to each batch of 2-Thiohydantoin that leaves the reactor. For us, this is not just another packaged commodity. This molecule reflects a tradition of precision and commitment. We keep an eye on each step, from the raw feedstocks to the sealed drum, because any slip at any point can set off a chain of trouble for formulators and researchers down the line. With every order, we know real-world projects depend on what we do—labs developing pharmaceuticals, scientists tuning their research, and process engineers optimizing their yields. We approach 2-Thiohydantoin with the same priorities they do: purity, certainty, and reliable logistics.

    Our facility channels decades of expertise in thiohydantoin chemistry. The version we produce commonly carries the model tag “2-thiohydantoin,” but our focus is less about model numbers and more about what’s inside the drum: a fine, off-white crystalline powder built around the thio-imide structure. Molecular structure matters. One sulfur atom in the ring unlocks pathways that oxo-analogues simply cannot touch. Laboratories synthesizing heterocycles or exploring sulfur-based drug scaffolds know this well; 2-thiohydantoin gives them a strong starting point. Its reactivity profile differs from classic hydantoins—the sulfur atom brings nucleophilic softness, and its stability in heated reactions often yields higher conversions than old oxo-based processes.

    The Value of Real Consistency

    Over the years, we’ve learned consistency means more than a certificate. Take purity: a crude batch might look adequate on paper, but small changes in impurity profiles ripple into downstream stages. We target purity up to 99% by GC, HPLC, or titration—whatever our customer’s process requires. Each batch profile includes details: residual solvents, tiny side products from the cyclization, and moisture readings. Many labs appreciate a physical product that pours easily, doesn’t clump, and can be weighed without fuss. Producers using 2-thiohydantoin to explore new APIs, tune herbicide intermediates, or run pilot rounds for specialty polymers rely on clean, unambiguous raw material. Overlook small degradants, and suddenly you’re chasing unexplained byproducts or clogging columns. We know this headache from personal troubleshooting and put our record behind each drum.

    In our experience, one of the unique benefits of 2-thiohydantoin is its compatibility with both conventional and green reaction conditions. Some partners use classic solvents and strong acids for thiohydantoin modifications; others have migrated to water-borne routes for environmental compliance. We’ve worked directly with groups adopting microwave synthesis, ionic liquids, or alternative energy sources to streamline their processes. Our technical team balances the needs of those scaling up production with those pushing into new reaction territory. There’s no room for theoretical solutions when changing a process mid-course. We work off the real numbers and actual test results, not just standard references.

    Usage Rooted in Lab and Plant Needs

    2-Thiohydantoin has carved out a dependable role in pharmaceutical R&D. For drug discovery, it delivers. Chemists value it as a starting core for heterocyclic derivatives—especially when nitrogen and sulfur electronics drive molecular recognition or binding affinity. In synthesis flows, the molecule stands up to a range of conditions: it survives robust alkylation, amidation, or acylation, depending on the target. In large-scale campaigns, the ability to transform 2-thiohydantoin efficiently feeds the upstream steps for both API candidates and intermediates. Our partners have used it to make antihypertensives, antifungals, and enzyme inhibitors—each application supported by full technical files and batch documentation.

    Outside pharma, 2-thiohydantoin supports the specialty agrochemical market. Thiohydantoin-derived building blocks can shape the backbone of herbicide actives, or enable custom synthesis for crop-protection blends. Quality control matters here, too. Modern formulations demand reproducible reactivity and stability under variable humidity or mixing conditions. Customers working in the pilot plant expect shipments that handle the real stress of isolated rural blending and long-term storage without caking or reactivity loss. Walk the floor in these facilities and it’s clear: a spec on paper isn’t enough—good product means no last-minute surprises, no wasted days on rework. That’s the difference that keeps customers calling us back.

    Polymer markers and electronics labs have also come to us with requests for tight tolerances and unique packaging. While these are niche, they reinforce the importance of reliable supply chains for lower-tonnage, higher-value products. Small-volume custom runs tested our skills, but those lessons made us more flexible for larger, repeat shipments. We’ve managed flask-to-reactor transitions and fine-tuned milling to support their workflows. Not every order is high volume; some labs need a kilogram for a proof-of-concept. We make room on the schedule for those just as much as for the multi-ton transport orders headed overseas.

    What Sets 2-Thiohydantoin Apart

    Spend time in the lab or the production floor and it becomes clear: not all hydantoins or thio analogs behave the same way. Our 2-thiohydantoin stands out by design, not just accident. While classic hydantoin shares some base structure, the thio variant shifts reactivity and physicochemical properties. The sulfur atom changes things at the molecular level—hydrogen bonding, electronic characteristics, and metabolic fate. For some pharmaceutical programs, this difference alters biological activity, offering unique binding or metabolic patterns. In chemical synthesis, yields and selectivities improve or new pathways open up only available with the thio analog.

    Customers sometimes ask why they would select 2-thiohydantoin over more established hydantoin derivatives. The answer lives in the project requirements. Hydantoins work well for certain transformations, but lack the nucleophilic or sulfur-based reactivity needed for others. For example, in sulfur transfer reactions, 2-thiohydantoin provides clear advantages. Its thermal properties also suit reactions needing high heat or pressure. From a processing perspective, our product's melting profile and flow characteristics help avoid bottlenecks in feeders and mixers, reducing equipment downtime. These are refinements we’ve achieved through steady process control and customer feedback.

    Some firms chase the lowest available price for intermediates, but we have found that real value emerges by focusing on stability and storage simplicity. Our 2-thiohydantoin resists yellowing or degradation over months, even under less-than-ideal warehouse conditions. That quality keeps modifications straightforward for downstream chemists. This has been a major advantage for smaller companies who can’t always guarantee climate-controlled stores.

    Supporting Our Partners

    Manufacturing a stable, pure compound in high volume only gets half the job done. Responding to customers and supporting their objectives rounds out what we do. Our support team spends as much time coordinating logistics as they do in the lab. International shipments, customs paperwork, coordinating with warehouses—these realities go hand-in-hand with the technical side. We adapt documentation to local requirements so that everything lands ready to use. Whether paperwork travels with the freight or by email, traceable batch data always accompanies the material. Our work doesn’t pause until the customer signs off on the intake—whether in New Jersey or Nantong.

    We’ve seen customers suffer from ambiguous labels or incomplete documentation shipped from non-manufacturing middlemen. Our strength as a primary producer is the direct link to the process and the real-time knowledge of any changes. If a batch is slightly out on a minor impurity, we know before it leaves the plant and communicate adjustments up front. There’s no substitute for having hands and eyes on the production line. Customers appreciate the direct access to process engineers or chemists, especially during scale-up or troubleshooting.

    Customers occasionally push for specification tweaks, tailored moisture targets, or alternative packaging. Our production lines can flex accordingly, as long as regulatory controls and equipment allow. Bulk orders ship in drums lined for chemical safety; smaller volumes receive anti-tamper seals and clear batch identifiers. We don’t cut corners or repackage under third-party labels—this approach shields partners from knockoff or adulterated goods entering the supply chain.

    Experience in Process Safety and Environmental Responsibility

    Handling sulfur-containing compounds presents operational hazards: vapor control, containment, and worker safety all rise to the forefront in our planning. Our safety record did not materialize overnight—each close call was a lesson that improved training and system design. Every workstation has real-time monitoring and personal protection protocols tailored to thiohydantoin’s health profiles. Solvent recoveries and waste streams receive in-house treatment, minimizing environmental load. Inspection teams sample and record emissions benchmarks with transparency, not just for inspectors but for our own sense of stewardship.

    We believe in open communication about risks—not just to comply with inspectors, but because responsible manufacturing makes businesses better neighbors. The communities living near our facilities expect it. Each year, we invest in scrubber upgrades, storage redundancy, and new risk-mitigation technology. No process is static, and regulatory requirements evolve. Our long history of compliance helps customers rest easier at audit time, knowing their supply chain backbone meets domestic and export standards.

    Placing environmental controls and batch reliability as non-negotiables means that we sometimes lose out on contracts when competitors cut those corners. We maintain our direction because over the years, fewer failures and shutdowns have paid off in stronger relationships and sustainable business. Long-term partners benefit when we invest up front. They value ready documentation and adaptability when regulations shift, without costly downtime.

    Why Relationships Matter in Supplying 2-Thiohydantoin

    What matters most in this business? Mutual trust and reliable exchange of information—customers who value open dialogue on process needs, and producers who respond in real time. As a manufacturer, we’ve worked with partners who started small and grew with us, and some who scaled back but stayed loyal because we listened when issues crept up. Quick adjustments, honest explanations of procedural hiccups, and willingness to test ideas on the bench before full-scale rollout have kept relationships healthy. Working through delays or unexpected specification shifts taught us more than just technical expertise.

    We welcome direct technical discussion during sampling and pilot phases. Many of our best process optimizations grew out of customer hands-on trials: a production chemist in Europe suggested a shortcut in filtering protocols; a US R&D group flagged a minor solubility drift at higher temperatures, which altered our drying cycle. These exchanges, over time, form the backbone for reliability. Large orders bring resources; small custom runs bring new challenges that improve our flexibility and sharpness.

    We also believe in continuity: repeat customers often receive the same process operators and support staff on their case, which helps resolve issues quickly. Batch-to-batch traceability links all the way back to the original lot number and raw feedstock. This system cuts confusion and saves time during any question or audit phase.

    Addressing Industry Challenges Together

    Each year brings new demands—greater documentation, more stringent environmental limits, tighter batch tolerance levels. For us, these are not just regulatory hurdles, but an opportunity to strengthen product reliability and customer relationships. Our technical and compliance teams track global requirements and continually retrain staff on changes. Batch analytics grow more detailed, with increased investment in lab automation, chromatography, and spectroscopy. We keep in touch with customers so we don’t lose sight of practical challenges—equipment vintage, local temperature fluctuations, or changes in downstream synthetic protocols.

    The specialty chemicals market is not immune to shocks. Global raw material supply hiccups or price surges can hurt production schedules. Our long supplier relationships, rooted in quality and transparency, shield us against the worst swings. Multi-source backup planning and local reserve inventory help us weather those storms. We’ve navigated sudden customs holds and raw material price distortions by engaging early and staying open with our partners.

    Looking forward, innovation in both chemistry and logistics will keep defining success in our sector. Customers reach for 2-thiohydantoin as a foundational building block, but their success depends on continued dialogue, adaptable processes, and a focus on safe, sustainable production. Our experience proves that an accountable, hands-on chemical manufacturer holds together supply chains and enables new product breakthroughs in ways no middleman or reseller can match. By keeping our operations transparent and flexible, we support the best science—one batch at a time.

    Conclusion: Trust Built Batch by Batch

    Every drum or package of 2-thiohydantoin leaving our facility carries more than product—it embodies the work of hundreds of hands, years of lessons, careful process evolution, and a standing commitment to our partners. Superior materials make a difference not because of what’s printed on the label, but because of how they perform, week after week, in the lab, in the plant, and in the field. As research expands and challenges multiply, we stand by the belief that manufacturing thoughtfully, and communicating directly, lay the best path forward—for 2-thiohydantoin users and for the wider chemical community.