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[2-[[4-[(2-Chloro-4-Nitrophenyl)Azo]Phenyl]Ethylamino]Ethyl]Trimethylammonium

    • Product Name [2-[[4-[(2-Chloro-4-Nitrophenyl)Azo]Phenyl]Ethylamino]Ethyl]Trimethylammonium
    • Alias Congo Red
    • Einecs 629-238-9
    • 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

    941682

    Iupac Name [2-[[4-[(2-Chloro-4-nitrophenyl)azo]phenyl]ethylamino]ethyl]trimethylammonium
    Molecular Formula C18H23ClN5O2
    Molecular Weight 391.86 g/mol
    Appearance Red to orange powder
    Solubility In Water Highly soluble
    Cas Number 5487-24-3
    Chemical Class Azo dye compound
    Functional Groups Azo, nitro, chloro, quaternary ammonium
    Charge Cationic
    Boiling Point Decomposes before boiling
    Ph Value In Solution Around 5.5–7.0
    Common Uses Biological stain, dye, laboratory reagent
    Stability Stable under recommended storage conditions
    Storage Conditions Store at room temperature, protected from light

    As an accredited [2-[[4-[(2-Chloro-4-Nitrophenyl)Azo]Phenyl]Ethylamino]Ethyl]Trimethylammonium factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.

    Packing & Storage
    Packing Amber glass bottle with tamper-evident cap, labeled with chemical name and hazard symbols; contains 25 grams of solid compound.
    Shipping Shipping of [2-[[4-[(2-Chloro-4-nitrophenyl)azo]phenyl]ethylamino]ethyl]trimethylammonium should comply with hazardous material regulations. Package securely in a tightly sealed, labeled container resistant to light and moisture. Provide appropriate documentation, including SDS, and select a certified courier for chemical shipments. Follow all relevant international, national, and local transport guidelines.
    Storage [2-[[4-[(2-Chloro-4-nitrophenyl)azo]phenyl]ethylamino]ethyl]trimethylammonium should be stored in a tightly sealed container, protected from light and moisture. Keep in a cool, dry, and well-ventilated area, away from incompatible substances, ignition sources, and direct sunlight. Ensure proper labelling and restrict access to trained personnel only. Follow all safety data sheet (SDS) recommendations for handling and disposal.
    Application of [2-[[4-[(2-Chloro-4-Nitrophenyl)Azo]Phenyl]Ethylamino]Ethyl]Trimethylammonium

    Applications of 2-[[4-[(2-Chloro-4-Nitrophenyl)Azo]Phenyl]Ethylamino]Ethyl]Trimethylammonium in Industrial Manufacturing

    2-[[4-[(2-Chloro-4-Nitrophenyl)Azo]Phenyl]Ethylamino]Ethyl]Trimethylammonium finds established, high-value use as a key intermediate in specialized industrial colorant and biochemical applications. Supplying direct to processing manufacturers, we ensure every batch meets strict downstream performance and compliance demands across several tightly regulated sectors. Explore below the exact scenarios where this material creates measurable value in the chemical and life sciences supply chains.

    1. Diagnostic Reagents for Clinical Biochemistry

    This compound plays a crucial role in the formulation of chromogenic substrate systems used for quantitative enzyme assays in automated clinical analyzers. By serving as a stable azo dye precursor, it enables precise colorimetric detection in diagnostic test kits, critical for high-throughput laboratory settings. Consistent purity and color development characteristics are essential for batch-to-batch reproducibility and clinical result reliability.

    Industry compliance standards

    • ISO 13485:2016 (Medical Device Quality Management)
    • EU In Vitro Diagnostic Regulation (IVDR) 2017/746
    • US FDA 21 CFR Part 866 (Clinical Chemistry and Clinical Toxicology Devices)
    • CLSI EP17-A2 (Evaluation of Detection Capability for Clinical Laboratory Measurement)

    Typical usage ratio

    • Typically 0.1–0.5% w/v in final reagent formulations, depending on enzyme system sensitivity and substrate turnover rate. Technicians adjust the concentration based on the analytical scale and specific wavelength requirements of the assay.

    Downstream process integration

    • Compound is introduced during the substrate reagent compounding stage after buffer system preparation but before final sterile filtration and reagent bottling.

    Final product types

    • Automated clinical biochemistry reagent kits
    • Enzyme activity determination substrates
    • Routine diagnostic test strips for hospital laboratories
    • Specialty colorimetric assay panels

    2. Synthetic Dye Intermediate for Textile Dye Formulations

    The unique azo structure of the material makes it a targeted intermediate in producing specialty cationic dyes for acrylic fiber and polyamide textile applications. It delivers enhanced color fastness and specific shade development, addressing the performance criteria of technical textile processors. The high purity minimizes the risk of process contamination and shade inconsistency during high-volume continuous dyeing operations.

    Industry compliance standards

    • OEKO-TEX® Standard 100 (Ecological Textile Safety)
    • ZDHC MRSL (Zero Discharge of Hazardous Chemicals, Manufacturing Restricted Substances List)
    • REACH Regulation (EC 1907/2006 Annex XVII on dyes)
    • ISO 105-C06:2010 (Color Fastness to Laundering)

    Typical usage ratio

    • Used at 2–6% owf (on weight of fiber) in cationic dyeing systems, fine-tuned for depth of shade and affinity to substrate; lower for pale shades, at upper end for intense colors.

    Downstream process integration

    • Employed in the dye synthesis reactor stage, it enters the process during the diazotization or coupling step for constructing the target dye molecule, followed by filtration, concentration, and standardization for mill use.

    Final product types

    • Cationic dyes for acrylic yarns and fabrics
    • Spun-dyed polyamide carpet fibers
    • Technical apparel and uniform fabrics
    • Specialty industrial textile colorants

    3. Chromogenic Agents in Water Quality Testing

    Water testing solution manufacturers use this compound in the development of chromogenic kits for rapid colorimetric detection of specific ions and organic contaminants. The material’s selective reactivity enables clear endpoint color change with high signal strength, supporting efficient field and laboratory testing protocols under regulatory monitoring programs.

    Industry compliance standards

    • US EPA Standard Methods for Examination of Water and Wastewater
    • EN ISO 17381 (Water Quality – Selection and Use of Water Quality Tests)
    • ASTM D5391 (Detection and Quantitation of Color in Water)
    • ISO/IEC 17025 (Testing and Calibration Laboratories Accreditation)

    Typical usage ratio

    • Ranges from 0.05–0.2% w/v in test reagent ampoules or powder pillows, regulated to ensure clear differentiation against standard reference curves.

    Downstream process integration

    • Added to the test kit formulation blend as the color reference indicator, immediately prior to packaging into single-use or multi-use vials under humidity-controlled environments to preserve shelf stability.

    Final product types

    • Drinking water quality field test kits
    • Wastewater analysis powdered reagents
    • Industrial effluent on-site detection strips
    • Laboratory colorimetric comparators for environmental monitoring

    4. Staining Solutions for Biotechnological Microscopy

    Biotech consumables manufacturers rely on this compound to prepare high-resolution staining solutions for analytical and research microscopy. The compound enhances contrast and visualization of cellular and tissue structures without significant background signal, meeting the sensitivity specifications of advanced imaging instrumentation used in life sciences research and medical diagnostics.

    Industry compliance standards

    • US Pharmacopeia (USP General Chapter <1040> Biological Stains and Dyes)
    • ISO 9001:2015 (Quality Management for Lab Reagents)
    • Good Laboratory Practice (GLP) Guidelines
    • WHO laboratory reagent requirements

    Typical usage ratio

    • Final working concentration is typically 0.01–0.1% w/v, selected based on specific staining protocol and magnification requirements; higher concentrations may be applied for dense tissue preparations or large-format imaging.

    Downstream process integration

    • Dispersed in aqueous or alcoholic solvent bases during the stain preparation phase, with filtration and pH adjustment followed by sterile filling into single-use dropper bottles or bulk lab containers.

    Final product types

    • Cytological stains for preparative microscopy
    • Histological dye sets for research laboratories
    • Microscope slide staining solutions
    • Quality control reagents for cellular imaging
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    Certification & Compliance
    More Introduction

    Introducing [2-[[4-[(2-Chloro-4-Nitrophenyl)Azo]Phenyl]Ethylamino]Ethyl]Trimethylammonium: Our Perspective as the Manufacturer

    The Heart of Our Dyes: Precision, Consistency, and True Industry Needs

    In the landscape of specialty chemical manufacturing, [2-[[4-[(2-Chloro-4-Nitrophenyl)Azo]Phenyl]Ethylamino]Ethyl]Trimethylammonium illustrates what dedication to process control and years of technical refinement bring to the table. After closely working in both kilo-lab and plant-scale environments for years, members of our team understand how this compound fits into complex manufacturing goals. Clients approach us because our technical people recognize how margin, yield, and batch repeatability really matter, not just “quality” in some broad sense. Real chemical manufacturing asks for more.

    Detailed Molecular Structure, Real-World Impact

    This compound offers an intriguing structure, where the azo linkage and nitro functionality intersect with a quaternary ammonium headgroup. Having seen dozens of similar intermediates pass through our process tanks, we appreciate how seemingly small shifts in the chemical structure end up causing big changes on the plant floor and for the end use. The inclusion of a quaternary ammonium group means tight control over ionic balance matters—rinsing and filtration steps must be dialed in or purity slips. In our own production, we keep a close eye on salt formation and manage pH at every step.

    There are other ways to build colorants and dye intermediates, some cheaper, some aiming for “universal” application. Through years of practical synthesis and feedback from downstream processors, we learned that substitutions on the phenyl rings sometimes drive solubility or lightfastness in unpredictable ways. This particular molecule’s combination of electron-withdrawing and electron-donating groups can change not only color profile but also how the dye resists acids or bases. We stand behind this product because our in-process controls and post-reaction purification steps consistently deliver the properties clients ask about most: brightness, hue sharpness, stability in solution, and resistance to shade shifting over time.

    Why the Industry Values This Chemistry

    We manufacture [2-[[4-[(2-Chloro-4-Nitrophenyl)Azo]Phenyl]Ethylamino]Ethyl]Trimethylammonium with repeated feedback from textile, paper, and ink formulators in mind. Many traditional dyes break down or lose sharpness at high temperatures, especially under alkaline or acidic runs. The compounds we make are regularly audited by end users for performance during thermal curing and long-term shelf storage. Some competitors offer more basic dye structures aiming at low-cost bulk runs, but this particular molecule shows strengths in fine color control and bath-to-bath repeatability. At production scale, we monitor every critical parameter—water content, reaction temperature, intermediate purification—to maintain its defining characteristics batch after batch.

    The applications range widely: textile colorants, paper imaging, and specialty inks all demand different things from a dye intermediate. Our experience in handling this quaternary ammonium compound’s unique solubility profile in both water and mixed solvents lets us offer tailored drying and packaging recommendations. We’ve tracked which changes on the process line (such as subtle variations in cooling profiles or neutralization protocols) can cause off-spec material or handling problems for clients downstream.

    Hands-On Experience in Scale-Up and Quality Control

    Scaling this synthesis beyond the lab brings its own set of challenges. As direct manufacturers, we face every bottleneck first-hand. Over time, we found that rapid phase changes and foaming—especially at the quaternary ammonium addition step—demand plant modifications, like improved agitation and precise dosing equipment. We invested in metering pumps and automated pH controllers to keep process variability tight. Every new campaign brings another set of learning points, and each batch gives us fresh testing data on how to refine protocols.

    Our in-house teams support rigorous analytical characterization—HPLC, NMR, and UV-vis absorbance readings all play a critical part in both intermediate and finished product release. We never rely only on third-party test labs for critical metrics. We built methods calibrated against real-world customer complaints and equipment; this has led to fewer disputes about color mismatch or unexpected precipitation. Data from our own runs, plus hundreds of hours spent troubleshooting dye reactors, guides our quality release decisions.

    Listening to End-User Realities: Not Every Product Fits Every Process

    Years in the industry have shown us that customer lines often operate beyond what “textbook” process conditions describe. We’ve watched downstream formulators push pH or mechanical agitation higher than expected, or subject dyes to unfamiliar solvent mixes. Some of our competitors try to “force fit” one dye into every application. Our approach involves deep conversations with users, so we document not just what the final product looks like but how it works in their environments. Dozens of trials tell us how this molecule handles accelerated aging, how it absorbs or resists various stain removers, and how it interacts with sizing agents or retention aids in papermaking.

    Process impurities can cause big changes in color tone, consistency, and even user safety. As manufacturers, we keep side-streams, waste, and minor contaminants under tighter controls than any outside trading house. This direct input pays off by preventing off-odors or unexpected viscosity jumps in the final formulation. It also means we are the first to spot new issues: once, a batch started throwing unexpected color during concentration. Hands-on root cause analysis revealed a subtle shift in reagent concentration upstream, something impossible to track just comparing final lab results.

    Model, Specifications, and Our Approach

    Every manufacturer knows that numbers can look outstanding on paper, but real value emerges through reliable process validation. We offer our [2-[[4-[(2-Chloro-4-Nitrophenyl)Azo]Phenyl]Ethylamino]Ethyl]Trimethylammonium in a standard grade we call NE-CPN-2C4N-TEQ, built from feedback generated over years of supplies and technical trials. Specifications include a minimum 98% main component purity, with closely watched side impurity profiles and tight controls on chloride and heavy metal content. We run every batch through particle-size analysis, colorimetric evaluation, and shelf-life tracking. Any variations lead our operations team right back to original raw materials and lot histories.

    Packaging comes in HDPE drums with liner bags, meant to withstand cycles of shipping and on-site handling. We use desiccant moisture indicators inside every shipment based on our past experience with dye degradation in humid conditions—especially for users near the coast or in tropical climates.

    Distinct Benefits Compared to Other Approaches

    Not every dye or dye intermediate in the azo or nitro series handles both oxidative and reductive formulations as well. Many similar compounds will break down or shade shift when exposed to high-energy processing equipment or non-neutral pH. Over years of troubleshooting with ink formulators and textile dyers, we have developed a process recipe that keeps unwanted byproducts at bay and prevents residues from carrying through to final formulations. In practical terms, these steps make color matching far less troublesome for end users and cut rework losses—a big point for anyone running production lines at scale.

    While some producers focus on what their equipment can already make, we built our NE-CPN-2C4N-TEQ model with direct input from downstream failures and color matching issues. Our batch records show lower rates of color drift and fewer complaints about haze or solubility limitations compared to standard azo dye intermediates made without quaternary functionality. We also ensure our product stays in easily handled powder form, based on real-world feedback from manufacturing partners who struggled with pastes or physically sticky materials.

    We have found our product often holds up better under extended light exposure and after repeated laundry or processing cycles. Laboratory tests only go so far; real insight comes from feedback after clients run hundreds of cycles or put material through months of outdoor exposure. This hands-on, feedback-driven evolution sets our compound apart in a crowded market.

    A True Manufacturer’s Commitment to Evolving Regulatory and Safety Demands

    Manufacturing specialty dyes today demands attention to new environmental requirements, often before regulations come into full effect. We built our internal checklist from early engagement with REACH and other international chemical safety agencies. Our teams respond directly to evolving effluent standards. Every time a government, especially in textile powerhouses, raises questions about minor byproducts or environmental impact, we are ready—not because it gets us headlines, but because our own site audits require it. We limit nitro-related byproducts, watch for AOX in manufacturing waste, and provide full composition and impurity disclosure for clients building products for global export.

    We run some of the strictest employee health protocols in our region, keeping air and water monitoring internal, not as an afterthought. We see the real chemical exposure limits, not just the ones that look good on a slide deck. As manufacturers, we know clean operations and strict waste capture are more than just formalities—they make for less downtime and fewer quality hold-ups. Waste stream monitoring and equipment upgrades happen regularly, based on review of internal spill reports and plant walkthroughs.

    Research, Troubleshooting, and Process Improvements: An Ongoing Dialogue

    Keeping our product at the top of its class means refusing to stay static. We invest time and resources in reviews with both university chemists and on-site engineers, absorbing lessons from any failures or new insights from the lab. Every anomaly, from a slightly different HPLC peak to a complaint about handling, becomes a trigger for change. This feedback loop lets us tweak both reactor design and downstream processing, strengthening our edge in a competitive field.

    At times, we have shipped material that worked perfectly for one end user but posed problems for another using a different pH or water source. Our direct control as the true manufacturer means we have the ability to solve these issues with technical tweaking and not just shifting blame or returning shipments. If a batch ever draws negative attention, the team who actually ran those reactors discusses the problem directly with the user, going as deep as necessary into chemical structure, impurity analysis, and plant-scale adjustments. No one understands a compound better than those who spent months scaling and refining its process route.

    Process Transparency: Why We Share More Than Just Certificates

    Real industry players don’t operate by hiding formulas or running vague specifications. We provide full transparency about our process flows, starting material sourcing, and impurity tracking. More clients have asked for in-depth impurity profiling and processing aids data before committing to long-term contracts. In this “open book” approach, the manufacturing team is ready to share batch data, updates to process conditions, and the root cause analysis from previous improvement projects. That track record makes us more than just a name on a drum.

    Innovation in Response to Industry Challenges

    The push for lower toxicity, better biodegradability, and stable color performance leads us to adjust synthetic routes, process aids, and purification steps. Sometimes, these changes improve cost or quality; sometimes, they simply comply with newer regulations. By maintaining internal pilot setups and keeping test runs active, we compare older and new process methods on a regular basis.

    Feedback comes not only from our clients but also from our own teams who pilot different crystallization or purification technologies. Trials with new solvents, cleaner oxidation agents, or more precise ion-exchange purification have already trimmed waste and increased product shelf stability. Direct experience manufacturing every batch by our own team leads to better cost control and a tighter handle on time-to-market for custom specifications.

    Supporting Reliable, Predictable Supply

    As manufacturers, we see the results of inconsistent supply chains and the hard impact of unreliable upstream sourcing. Every time a key intermediate supplier falters, or weather disrupts the shipment chain, the effects pass all the way to formal supply contracts and delivery schedules. By maintaining substantial in-house stocks of critical raw materials, quality-assured supply agreements, and direct relationships with logistics providers, we cut reaction downtime and support quicker project ramp-up.

    Direct Dialogue: Clients Gain from Plant-Floor Experience

    With our team involved directly in planning and running reaction campaigns, clients gain answers rooted in experience. When a client asks why a specific batch picked up a slightly different hue, they reach our process chemists—not call-center intermediaries. The technical exchange, all the way from raw material fingerprinting to storage and shipping, helps fix problems at their source, supports regulatory reviews, and sets up new product launches for smoother outcomes.

    Making a Difference in Real-World Applications

    End users rely on our [2-[[4-[(2-Chloro-4-Nitrophenyl)Azo]Phenyl]Ethylamino]Ethyl]Trimethylammonium for its reliability and real-world performance, not because of marketing hype. Feedback from long-standing customer relationships reveals how dye shelf life, color tone retention, and resistance to powder caking keep their processes running at high yield.

    Many users demand proof of performance over thousands of cycles. We listen to those needs, trial formulations under actual end-use temperatures, and observe outcomes—from rapid-dry inkjet output to multicycle textile wash-fastness.

    Toward a Smarter, Cleaner, and More Reliable Future

    Continuous feedback from our dedicated manufacturing environment, paired with honest dialogue with technical users, drives improvements. This approach not only improves our own operations but sets higher benchmarks across the industry. We do not push products that don’t fit user needs, and we constantly update processes to meet reality—from regulatory shifts to emerging application trends.

    Anyone with a real stake in their production line asks for more than the lowest price; they want consistent quality, responsive technical dialogue, and transparency throughout the manufacturing process. Our years spent developing, scaling, and refining [2-[[4-[(2-Chloro-4-Nitrophenyl)Azo]Phenyl]Ethylamino]Ethyl]Trimethylammonium show what happens when true manufacturing expertise stands behind a name.