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2-Amino-4-Hydroxybenzothiazole

    • Product Name 2-Amino-4-Hydroxybenzothiazole
    • Alias 2-Aminobenzothiazol-4-ol
    • Einecs 214-301-6
    • 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

    492338

    Chemicalname 2-Amino-4-Hydroxybenzothiazole
    Casnumber 137-56-6
    Molecularformula C7H6N2OS
    Molecularweight 166.20
    Appearance Light brown to beige powder
    Meltingpoint 259-262°C
    Solubility Slightly soluble in water
    Density 1.49 g/cm3
    Purity Typically ≥98%
    Iupacname 2-amino-1,3-benzothiazol-4-ol
    Synonyms 2-Amino-4-hydroxy-1,3-benzothiazole
    Storagetemperature Store at room temperature

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

    Packing & Storage
    Packing The 2-Amino-4-Hydroxybenzothiazole is packaged in a sealed 25g amber glass bottle with detailed chemical labeling and safety instructions.
    Shipping 2-Amino-4-Hydroxybenzothiazole is shipped in tightly sealed containers, protected from moisture and direct sunlight. It is labeled according to regulatory requirements, and handled as a laboratory chemical. Appropriate documentation accompanies the shipment, and transportation complies with safety and hazard regulations to ensure safe delivery and handling.
    Storage 2-Amino-4-Hydroxybenzothiazole should be stored in a tightly closed container, in a cool, dry, and well-ventilated area, away from incompatible substances such as oxidizing agents. Protect from moisture, light, and heat. Ensure the storage area is free from ignition sources and clearly labeled. Use suitable protective equipment when handling to prevent skin and eye contact.
    Application of 2-Amino-4-Hydroxybenzothiazole

    Applications of 2-Amino-4-Hydroxybenzothiazole in Industrial Manufacturing

    2-Amino-4-Hydroxybenzothiazole serves as a valued intermediate across specialty chemicals, pharmaceuticals, dye synthesis, and advanced material sectors. Our facility ensures consistent batch quality, regulatory traceability, and tailored supply formats for high-volume industrial integration.

    1. Active Pharmaceutical Ingredient (API) Intermediate for Antimicrobial Agents

    This material acts as a key intermediate for the synthesis of certain antimicrobial and anti-tuberculosis agents. It integrates into multistep organic synthesis protocols, contributing a benzothiazole motif essential for bioactive compound frameworks. Its reactivity and purity facilitate direct involvement in the core coupling or heterocyclic extension stages in GMP-regulated pharmaceutical processes.

    Industry compliance standards

    • ICH Q7 Good Manufacturing Practice for Active Pharmaceutical Ingredients
    • European Pharmacopoeia (Ph. Eur.) monographs for intermediates—chapter 5.10
    • FDA 21 CFR Part 211 (cGMP for Finished Pharmaceuticals)
    • USP General Chapter <1078> Good Manufacturing Practices for Bulk Pharmaceutical Excipients (when applicable)

    Typical usage ratio

    • Employed at 0.2–1.5 molar equivalents relative to the target API nucleus; precise dosage adjusted during route scouting and scale-up based on yield and impurity profile

    Downstream process integration

    • Introduced during the heterocyclization or amination stage within synthetic API manufacturing
    • Frequently followed by chlorination, methylation, or sulphonation steps, depending on API target
    • Batch or semi-continuous reactor charging, monitored under validated in-process controls for impurity carryover

    Final product types

    • Bulk active pharmaceutical ingredients (APIs) for antimicrobials
    • Precursor fragments in anti-tuberculosis drug synthesis
    • Building blocks for benzothiazole-based finished formulations

    2. Rubber Chemical Intermediate: Vulcanization Accelerators

    Manufacturers utilize 2-Amino-4-Hydroxybenzothiazole in the preparation of high-performance vulcanization accelerators for the tire and technical rubber industry. This compound is an essential precursor in the creation of 2-mercaptobenzothiazole derivatives, supporting critical rubber cross-linking formulations where low toxicity and high scorch safety are required.

    Industry compliance standards

    • ISO 9001:2015 Quality Management Systems for rubber chemicals manufacturing
    • OEKO-TEX® Standard 100 (relevant chemical restrictions for textile rubber parts)
    • EU REACH Regulation (EC) No. 1907/2006—Annex XVII for restricted substances
    • Japanese Chemical Substances Control Law (CSCL)

    Typical usage ratio

    • The raw material is incorporated at 0.5–3% w/w in masterbatch compounding steps for accelerator production; actual rates depend on the targeted accelerator grade and required induction period

    Downstream process integration

    • Reacted with sulfurizing agents to yield benzothiazole sulfenamides or sulfenamide derivatives
    • Product recovered and purified via crystallization or solvent extraction to match end-user filterability and purity parameters
    • Integrated upstream in accelerator compounding lines feeding direct to rubber mixing equipment

    Final product types

    • Automotive and truck radial tires
    • Industrial conveyor belts
    • Rubber hoses and seals
    • Rubber footware and technical moldings

    3. Dye and Pigment Manufacturing: Heterocyclic Colorant Synthesis

    The molecule functions as a key building block in azo and sulfur dye synthesis for textile, leather, and paper coloration. Its structure supports the formation of benzothiazole-based heterocycles, delivering stability and targeted chromaticity in high-value pigment lines. Colorant specialists employ controlled diazotization, condensation, and further substitution reactions involving this intermediate for tailored dye molecule architectures.

    Industry compliance standards

    • ISO 9001:2015 Quality Management Systems for dyestuff manufacturing
    • EU REACH Regulation—Substances of Very High Concern (SVHC) screening for finished pigments
    • ZDHC MRSL for textile auxiliaries (Zero Discharge of Hazardous Chemicals)
    • EN 71-3:2019 for migration of certain elements in pigments for toy applications (when relevant)

    Typical usage ratio

    • Typically involved at 5–15% of the total dye batch mass, adjusted for target shade, solubility, and fastness performance; stage-wise addition with buffer and coupling agents according to product specification

    Downstream process integration

    • First introduced in initial coupling or cyclization phases of dye production
    • Serves as a precursor for additional arylation, halogenation, or N-alkylation forming the dye chromophore
    • Blending with dispersants and stabilizers prior to spray drying for end-user dispersible dye forms

    Final product types

    • Reactive dyes for cellulose-based textiles
    • Sulfur dyes for denim and knits
    • Organic pigments for plastics, leather, and paper
    • Dedicated colorant solutions for specialized printing inks

    4. Corrosion Inhibitor Formulation for Industrial Water Treatment

    Industrial water treatment formulators use this compound as a precursor in synthesizing benzothiazole-based corrosion inhibitors, especially for closed cooling water circuits and industrial boiler systems. Its nitrogen and sulfur functionalities enable creation of derivatives with strong chemisorption on steel surfaces and proven long-term metal passivation in the presence of dissolved oxygen and process contaminants.

    Industry compliance standards

    • ANSI/AWWA B600 for water treatment chemical quality
    • ISO 14001 for environmental management in chemical processing
    • EU Biocidal Products Regulation (BPR, Regulation (EU) 528/2012) for final formulations
    • U.S. EPA Specifications for Water Treatment Chemicals—registration where applicable

    Typical usage ratio

    • Precursor typically added at 1.0–4.0% of batch mass on active ingredient basis in multi-component corrosion inhibitor systems; individualized based on targeted protection time and specific make-up water characteristics

    Downstream process integration

    • Condensation and oxidative modification reactions yield complex inhibitors prior to blending with antiscalants and dispersants
    • Final mixture formulated into liquid concentrates or solid blocks for metered dosing at plant level
    • Full analytical validation conducted before release for on-site application

    Final product types

    • Chemical water conditioning additives for chillers and cooling towers
    • Corrosion inhibitor blends for closed-loop heating systems
    • Boiler treatment packages for industrial steam generation
    • Special applications: anti-corrosion film formers for storage tanks and pipelines
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    Certification & Compliance
    More Introduction

    Understanding 2-Amino-4-Hydroxybenzothiazole from a Manufacturer’s View

    An Introduction Grounded in Experience

    Manufacturing 2-Amino-4-Hydroxybenzothiazole starts with an appreciation of chemistry’s details. For chemical producers, every batch reflects years of technical learning and the ability to respond to industry demands. Production harnesses select raw materials and tightly controlled synthesis steps to achieve a chemical structure prized for both stability and unique reactivity.

    We know this compound under the code 2-Amino-4-Hydroxybenzothiazole. In the production line, the typical presentation comes as a pale yellow crystalline powder. You don’t see many color variances if purification runs get monitored carefully and solvent ratios stay constant; yellow hues signal the right level of purity, while off colors tip off contamination or side-products.

    Model and Specifications Shaped by Demanding Standards

    Our internal specifications guide every kilogram heading out of the plant. In the bulk chemical world, small drifts in melting point, moisture, or residual impurities can set buyers back weeks or force painful rework. For 2-Amino-4-Hydroxybenzothiazole, we validate purity regularly by HPLC, where we aim for not less than 98% on a dry basis. Sharpening that figure to 99% purity is possible, but only with refined crystallization and extra raw material selection, so both cost and technical effort come into play. Particle size distribution also scratches beneath the surface—fine product offers quicker dispersion in batches but may dust more readily on handling. We measure moisture with Karl Fischer titration and restrict water content to less than 0.5% to keep performance steady, especially if the compound feeds into moisture-sensitive syntheses downstream.

    Getting the specification right means walking the plant floor and paying attention to filter clarity, dryer temperature, and how the compound flows through the packaging chute. Over-dried batches can develop static, making handling awkward for operators and customers. On the other hand, product left fractionally damp prompts concerns about shelf-life and batch-to-batch consistency.

    Usage Anchored by Real Applications

    2-Amino-4-Hydroxybenzothiazole finds its way into a surprisingly wide spread of chemical applications. The main use circles back to pharmaceutical building blocks. Analysts and R&D chemists rely on the core benzothiazole ring for developing bioactive molecules, especially targeting enzyme inhibition or incorporating into heterocyclic structures. The precise substitution at positions 2 and 4 makes this compound distinct from its structural relatives, lending more hydrogen bonding ability and reactivity for further transformations.

    Down the line, plastics and dye manufacturers value the compound’s electron-donating and accepting power, allowing it to act as a precursor for specialty dyes or as an intermediate in polymer modification. Over the years, customer feedback has highlighted appreciation for high solubility in polar organic solvents and robust performance during stringent reaction temperatures. Any deviation—be it an extra halogen in the structure or loss of the amino or hydroxy groups—instantly alters color depth, reactivity, and how downstream reactions progress.

    From experience, our end-users appreciate bulk lots that don’t clump up in storage or introduce color inconsistencies in finished goods. Technical salespeople often hear from ink specialists who want a product that meets demanding colorfastness or stability requirements. Our engineers respond with tweaks to crystallization and drying profiles, chasing that right balance between processability and reactivity.

    Production Experience: Unique Challenges and Reliable Solutions

    Producing 2-Amino-4-Hydroxybenzothiazole consistently depends on tight-reined process control—not just textbook chemistry. Variation in raw material quality poses daily risks; a batch of impure starting benzothiazole causes extended purification and lower yield. Preventing cross-contamination requires clear SOPs and upfront communication between shifts, as minor by-product formation can foil careful users of the product downstream. Solvent choice and temperature have outsize effects on yield and purity, so minor deviations spark reworking that everyone aims to avoid.

    Handling can’t be overlooked. A free-flowing, dust-free powder proves safer and more attractive for bulk users, so fluidized bed dryers trump older tray systems in our experience. We’ve learned to collect operator suggestions—those who bag the product daily notice subtle issues before a distant lab does. Investments in local ventilation and dust suppression gear have improved working conditions and reduced product losses—nobody likes losing material to dust or endangering the crew during packaging.

    Waste minimization runs in parallel. Side-products represent both lost value and potential regulatory headaches; being able to recover or at least safely destroy those materials is standard operating procedure. Waste reduction steps, sometimes down to the piping or filter cloth used, matter in the long run. Rethinking solvent recovery has shaved costs over time, and our current protocols recycle over half the process solvents, meeting both cost and environmental pressures.

    Comparison With Other Benzothiazole Derivatives

    2-Amino-4-Hydroxybenzothiazole stands apart from other benzothiazole compounds with its specific pattern of substitutions. Adding the amino and hydroxy groups, carefully positioned, sets up differentiated hydrogen bonding compared to the parent benzothiazole or simpler 2-aminobenzothiazole. The result is a molecule that enters distinctive synthetic channels, opening access to pharmaceutical, dye, or chemical specialties not possible with its cousins.

    For instance, without the 4-hydroxy group, the structure loses some of its appeal in dye synthesis, where enhanced solubility and ready reactivity matter most. Taking out the 2-amino group limits its ability to participate in certain pharmaceutical couplings or heterocycle expansions. The real distinction comes in process flow: users turn to 2-Amino-4-Hydroxybenzothiazole for forward integration into complex molecules where precise reactivity counts. Compounds with methyl or halogen substitutions at other positions lack this sharp edge; either their reactivity tumbles or application range shrinks. We’ve seen demand shift over time as downstream technologies mature, but those who need this specific substitution pattern return for the performance edge it offers.

    The chemical’s melting point also differs from other substituted benzothiazoles, often tracking just below 200°C when properly purified. Moisture sensitivity and solubility in common solvents, such as methanol and DMF, stack up favorably—with solubility increases opening new formulation techniques for processing plants. Practically, our customers stick with 2-Amino-4-Hydroxybenzothiazole when alternative structures hamper their end-product or drag out purification at later stages. This isn’t a theoretical edge: experienced formulators return to us year after year in regions where production yields and regulatory standards tie right back to early building block choices.

    Quality Control: From Raw Material Testing to Finished Lot Release

    Resting on supplier certificates often disappoints. We conduct our own analysis on every shipment of precursor materials, keeping contamination and batch-to-batch drift in check. In our facility, we focus on critical-to-quality attributes: purity, moisture, melting point, and appearance. Spectroscopic analysis, beyond regular HPLC, catches subtle shifts in structure—sometimes invisible to the naked eye but real in downstream reactions.

    Release testing is strict. Each batch waits in quarantine while QC pulls and analyzes representative samples. Headspace GC picks up traces of residual solvents, and we scrutinize every lot for trace metals, knowing that parts-per-million differences can derail sensitive syntheses. Documentation traces results for every batch, matching standards for audit trails demanded by pharmaceutical and specialty chemical buyers.

    End users care about traceability. If a batch causes issues, a clear record shortens resolution times and supports customers’ own compliance projects. We put resources into this infrastructure—barcode tracking, digital logs, and sample retention all support a stable partnership with users who need reliable supply for months or years. The intangible here is trust, but it’s cemented in thousands of analysis data points as much as anything promised verbally.

    Supply Challenges and Solutions from the Manufacturing Floor

    Global supply chains push their own set of demands onto specialty chemical producers. Raw material access can surge or dry up with geopolitical shifts or upstream plant outages. As a result, we cultivate diverse suppliers and shape contractual relationships that weather short-term disruptions. Stockpiling high-purity intermediates during low-demand cycles provides a buffer, though not without inventory costs.

    Shipping specialty chemicals like 2-Amino-4-Hydroxybenzothiazole needs careful paperwork and secure packaging. Our experience shows that even the best powder can degrade in sub-par bags or if moisture seeps through seams. We rely on double-layered sacks and secure drums, using desiccant packs where extended journeys are likely. Shipment tracking has tightened up—all packages carry tamper-evident seals, and logistics staff receive targeted training to spot leaks or labeling mismatches before export.

    Reach, as well as local regulatory systems, dictate export options and the paperwork rhythm. Those working in, say, active pharmaceutical ingredient development expect continual data access, reference samples, and evidence that the product meets not just technical needs but evolving compliance frameworks. Over the years, we’ve invested in document control systems and partnered with local experts in major destination markets to keep up with filing requirements and spot potential snags before they snowball.

    Trends: What Industry Demand Reveals

    The landscape for 2-Amino-4-Hydroxybenzothiazole consumption has shifted as both pharmaceutical and specialty chemical innovation accelerate. Early years saw smaller, specialty orders, predominantly for lab-scale use. Lately, scale-up requests have grown, pushing us to expand production lines and retrain operators for larger volume handling while keeping purity at top levels.

    Feedback from formulators and industrial chemists confirms the strong drive towards high-purity, consistently handled product that doesn’t upset downstream syntheses. They don’t just want a chemical—reliability, predictability, and ready technical support matter as well. We invest in cross-functional teams, bringing together production, QC, and application engineers to troubleshoot and support user requests in real time.

    Emerging uses in advanced material science, such as for new pigments or electronic component development, pull incremental R&D investment each year. Our technical staff follow customer innovation closely, running pilot studies and adjusting process steps based on early data, whether in alternative solvent conditioning or new stabilization techniques.

    Environmental Responsibility and Risk Management

    Manufacturing chemicals at scale involves risks—both to people and the planet. Preventing releases into the environment and limiting energy consumption motivate design changes over time. Closed-loop solvent systems, on-site wastewater treatment, and energy-optimized reactors all contribute to making our production more sustainable than in years past.

    Protocols for worker safety include regular air monitoring, ergonomically arranged handling equipment, and training drills. Investing in good practices doesn’t just prevent accidents—lower staff turnover leads to more experienced operators who spot early issues, minimizing rework and improving yields. Attention to proper solid waste disposal, especially when side-products may carry hazard ratings, keeps us on the right side of both the law and community expectations.

    Every new process stage is reviewed for environmental and safety impact. Internal audits, both scheduled and random, allow us to catch gaps before authorities or market partners raise concerns. Conversations with local communities and participation in voluntary certification schemes anchor our operations in the evolving expectations of modern manufacturing. Risk management isn’t a one-time matter; feedback and ongoing updates shape safer, cleaner, and more resilient operations.

    Looking Ahead: Innovation and Partnership

    Future advances will rely on both in-house research and cooperation with academic and industrial partners. Upgrading process analytics, investing in next-generation purification techniques, and exploring greener raw material sources stand as top priorities. Our technical partnerships with downstream users feed product improvements, from customized specifications to alternative packing solutions. The push for digitalization, real-time monitoring, and enhanced supply chain transparency continues to reshape our operations.

    We meet regularly with customers, suppliers, researchers, and regulatory thinkers to anticipate both challenges and possibilities. As users of 2-Amino-4-Hydroxybenzothiazole expand into new specialties, we adjust production and documentation to support innovation, while keeping the experience gained from decades of manufacturing close at hand. Trust, built on technical consistency and real support, remains the foundation of every supply partnership.

    Summary: A Manufacturer’s Perspective Drives Product Excellence

    Producing and supplying 2-Amino-4-Hydroxybenzothiazole links chemistry and hands-on experience at every stage. Challenges—from purity and consistency to supply chain and environmental demands—have driven continuous improvement on our line. Working closely with users throughout the value chain, we’ve come to appreciate that excellence in chemical manufacturing goes beyond narrow technical metrics. It calls for ongoing learning, personal attention to detail, and an openness to change.

    With a focus on quality, reliability, and close collaboration, we support our customers in pushing the boundaries of what can be achieved with benzothiazole derivatives. Our work doesn’t end with the batch leaving our site; it continues as we help turn a key building block into future pharmaceuticals, dyes, electronic materials, and more. As science moves forward, so does our commitment to safe, sustainable, and innovative chemical manufacture.