|
HS Code |
500500 |
| Cas Number | 2046-76-0 |
| Molecular Formula | C6H5NO4 |
| Molecular Weight | 155.11 |
| Iupac Name | 4-nitrobenzene-1,2-diol |
| Synonyms | 4-Nitrocatechol, 1,2-Dihydroxy-4-nitrobenzene |
| Appearance | Yellow to orange solid |
| Melting Point | 152-154°C |
| Solubility In Water | Moderately soluble |
| Boiling Point | Decomposes before boiling |
| Density | 1.67 g/cm³ |
| Pubchem Cid | 12971 |
| Smiles | C1=CC(=C(C=C1O)O)[N+](=O)[O-] |
As an accredited 4-Nitropyrocatechol factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | 100 g of 4-Nitropyrocatechol is supplied in an amber glass bottle, clearly labeled with hazard symbols and product details. |
| Shipping | 4-Nitropyrocatechol is shipped in tightly sealed containers, protected from light, moisture, and incompatible substances. It is classified as hazardous and must be labeled accordingly. Transport follows relevant regulations (such as DOT, IATA, IMDG), with appropriate documentation and safety precautions to prevent leaks, spills, or exposure during transit. |
| Storage | 4-Nitropyrocatechol should be stored in a tightly sealed container, away from light, heat, and sources of ignition, in a cool, dry, and well-ventilated area. Keep it separated from incompatible substances such as strong oxidizers and reducing agents. Label storage clearly, and ensure secondary containment is used. Use personal protective equipment when handling. |
Competitive 4-Nitropyrocatechol prices that fit your budget—flexible terms and customized quotes for every order.
For samples, pricing, or more information, please call us at +8615380400285 or mail to sales2@liwei-chem.com.
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Tel: +8615380400285
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Daily life connects to industrial chemistry in more ways than most people realize. In our business, every step from early synthesis to finished specialty chemicals shapes medicine, agriculture, electronics, and research. Our team has spent years watching trends change, customers' technical demands sharpen, and safety standards rise. One compound that deserves deeper introduction is 4-Nitropyrocatechol. Our own production site has scaled this product over several decades, and it remains important to many of our partners in pharmaceutical, electronic, and analytical research.
Most mention of 4-Nitropyrocatechol stops at its chemical formula or purity. We don’t think that reflects its deeper role in applications, nor our onsite work to hold each batch to real quality standards. In-house, we use processes that follow every step closely from raw catechol sourcing through nitration, recovery, drying, and final packaging. Relying on consistent protocols with high-purity starting materials, we repeatedly meet the needs of strict downstream chemistry.
Our current lot of 4-Nitropyrocatechol—offered as Model 2NP-99—shows yellowish crystalline powder, with assay levels regularly measured above 99% by HPLC. Very low moisture, controlled heavy metal content, and prompt analytical checks all play a role in reducing the risk of process downtime for customers making advanced materials. This isn’t only technical talk; losing a single run for a pharma intermediate or calibration standard often means whole-day setbacks—or broken product schedules. We spend the time up front to keep impurity profiles within tight bands, especially with sensitive applications like nitroaromatic coupling, colorimetric analysis, and development of new electronics materials that react to even tiny differences batch-to-batch.
Chemistry has its showpieces, but seldom gets spotlighted when it comes to real-world impact. Our direct buyers often work in laboratories or small pilot plants developing API intermediates, antioxidants, or analytical reagents. 4-Nitropyrocatechol is a backbone building block for certain azo dyes and an essential intermediate in oxidative coupling reactions in pharmaceutical discovery. Customers also highlight its selectivity for chelating trace metals, making it useful in environmental testing protocols. We see it ordered in both bulk drums and research-scale packs, since the same molecule might catalyze a full-scale process at a multinational, or serve as the analytical reference for a university project.
Feedback points to its niche in diagnostic chemistry, especially for routine iron or copper detection. The way it forms strong colored complexes under precise pH and buffer conditions helps labs cross-check instrument calibration or run spectrophotometric tests for drinking water, food safety, and biochemistry research. It takes more than casual purity—it requires sharp control of side-product contaminants, since color shifts trace back to hidden impurities. Our lab stays close to this demand. Each production cycle includes test lots used for standard calibration and trace metal evaluation, making sure researchers and analysts can trust their readings and methods line up across months or years.
In our factory, talk of “quality” skips the slogans and pays close attention to specifics. Raw catechol itself can bring subtle but serious variations if sourced with minor trace metals, so we lock down approved supply chains and keep storage moisture tightly monitored. For nitration, we batch small enough to keep temperature profiles checked at six set points, confirming not only main product yield but also byproduct profiles by GC and HPLC. Every run’s retained samples let us answer customer questions not only about current deliveries but also dispatched lots from previous years.
There’s more to it than the manufacturing process. Long-term customers sometimes ask about product shelf life or stability under divergent shipping conditions. To address this, our 4-Nitropyrocatechol undergoes multiple storage studies: sealed in glass, exposed to typical summer and winter temperature swings, and subjected to repeated opening to simulate heavy laboratory use. These in-house tests allow us to recommend packaging, labeling, and safety handling based on real evidence—minimizing loss or degradation under field conditions. Such practical validation helps technical teams keep processes running rather than getting bogged down with surprise storage issues on arrival.
Buyers sometimes ask how 4-Nitropyrocatechol differs from similar products, such as 3-nitrocatechol, 2-nitrophenol, or plain catechol itself. Our own experience confirms each nitroaromatic brings distinct strengths and limitations, right from solubility to reactivity and stability.
4-Nitropyrocatechol’s positional substitution gives it key redox behavior differences from its 3-nitro cousin, particularly for metal ion complexation. In water or alcohols, it dissolves more reliably at fixed pH than 2-nitrophenol, which can crystallize out or degrade with light. This boosts its reliability as a reference standard, especially in chemical analysis. Compared to unsubstituted catechol, the nitro group brings greater oxidative stability and slower photo-decomposition—practical advantages in shelf life and field use where long-term performance matters.
We’ve seen technical partners who tried to substitute with easier-to-find products often come back after seeing poor results: lower yields in coupling chemistry, unrepeatable colorimetric assay performance, or storage breakdown during shipment. There’s no substitute for correct substitution patterns in fine chemical intermediates. We learned long ago that skipping such details costs more than it saves.
Operating as both a producer and handler of nitro-organics sharpens our focus on risk at each step—process, storage, and transport. 4-Nitropyrocatechol doesn’t present the volatility of low-boiling solvents nor the combustibility of fine magnesium powder, yet the nitro group requires respect for both toxicity and reactivity. We limit worker exposure with fast, closed handling systems, negative-pressure containment, and strict hygiene rules.
Disposal procedures receive equal attention. Process streams get segregated and treated to destroy residual nitroaromatics before wastewater discharge. We take pride in yearly reviews of our effluent data, remaining well within local and international regulatory thresholds. Customers who run small-quantity analytical procedures can dispose of minor waste through standard laboratory organic regimes, but we are always available to discuss best management practices for scale-up or long-term storage needs.
Years of direct service in this specialty sector prepare us to recognize what customers see in practice. Small improvements at the manufacturer level translate into smoother projects for laboratories, faster scale-up for contract manufacturers, and fewer headaches for environmental safety teams. We regularly re-examine our own operations, benchmarking not just for analytical “numbers” but for true real-world satisfaction.
We learned the value of backward traceability when an overseas customer once questioned a faint color shift during assay development. Our archived records, along with tight batch-to-document matching, let us clarify the issue—and avoid wasted time. These routines distinguish direct producers from mere traders. We believe in open dialogue: suggestions and observations from labs and plant sites drive weekly review meetings, not just tolerance checks and “pass/fail” shipment paperwork.
Customers often seek real technical guidance—how to store, how to blend, how to avoid deactivation or side reactions in multi-step syntheses. Our technical staff includes seasoned chemists who’ve spent years troubleshooting actual reactions, not just reading from textbooks. We answer questions about microwave irradiation effects, low-temperature solubility, buffer compatibility for reference standards, and how to handle trace degradation during high-throughput screening in emerging pharmaceutical research.
Waste disposal advice, risk controls for pilot-scale work, and data on unusual couplings all come from direct requests. Sharing what we see in our sector isn’t just a service—it helps the industry as a whole move forward, minimizing duplication of effort and avoiding known pitfalls. We welcome feedback, both positive and critical, and believe these conversations make the product better year over year.
Shifting from kilograms to tonne-sized volumes changes how packaging and shipment work in reality. 4-Nitropyrocatechol is sensitive to both moisture and prolonged sunlight, so we rely on multi-layered packaging with robust desiccants. Each lot receives vacuum sealing, tamper-proof labeling, and barcoded batch numbers to aid at-receipt checks and prevent shrinking or caking. These aren’t afterthoughts. Our operations team tracks performance from floor to loading dock, translating small details—sturdy drums, reinforced cartons—into reduced onsite problems for plant buyers or research managers.
Shipping timelines matter as much as purity. We plan regular sea and air shipments, retaining safety, customs, and documentation experts in-house. Having direct channel control means faster response to urgent project timelines or regulatory documentation, bringing extra relief during global supply chain production cycles or lab season ramp-ups. Our feedback loop runs all the way to the destination dock, where we collect post-shipment handling reports—another valuable resource for continuous improvement.
We’ve resisted the temptation to treat 4-Nitropyrocatechol—or any other specialty chemical—as a simple commodity sale. Certain sectors, especially R&D-driven companies, push us to change specifications or upgrade assay reporting, trace impurity breakdowns, or adapt container sizes. The flexibility comes from owning the process up and down the production chain. For example, pharmaceutical teams may ask for specific particle size distribution to reduce dissolution variability, or electronics developers request co-validation with pyrogenic silica compatibility. Our team plans side-by-side with theirs from early pilot batches to commercial production runs.
Direct, open communication and careful process logs allow us to tweak parameters without losing track of the fundamentals—assay, impurity, solubility, and shelf life. Over time, this supports each partner in tackling tough problems without risking unexpected failures, since every customized change receives in-house review and batch-specific export certification.
It’s easy to recite hazard codes or paste regulated language from authority databases. As we handle material, we see firsthand how small operational details build a safer factory and distribution network. 4-Nitropyrocatechol, while stable enough for commercial use, can irritate skin, eyes, and respiratory tracts at higher exposures. Our response plan isn’t theoretical—we hold twice-yearly drills, outfit production zones with point-source extraction, and engineer backup ventilation for all nitration work.
We brief downstream users on what works in practice, such as immediate spill neutralization with dilute sodium carbonate or stepped dilution of filtrates before incineration. Emergency stocks of spill kits, fast-responding PPE supplies, and real reporting channels for near-miss incidents all work better because our staff have learned lessons from years of hands-on experience, not just from reading manuals.
The regulatory and innovation landscape rarely stands still. We track evolving REACH directives, drug and diagnostic validation guidelines, and environmental disclosures. Each change triggers careful review—retargeting testing, updating batch files, and requalifying internal procedures.
For example, rising emphasis on green chemistry means we work with upstream suppliers to lower our own environmental burden—optimizing reaction work-up, minimizing nitrite and nitrate emissions, and scaling automation to cut waste. Such projects demand long-term view and investments. Having an engaged technical team on the factory floor, supported by quality and analytical expertise, allows us to respond to customer questions and keep our own practices ahead of shifting regulations.
Our take on the future is not about chasing fads, but about meeting solid, predictable industrial needs, supporting honest research, and delivering consistent building blocks for further innovation in rapid, responsible ways.
Producing and supporting 4-Nitropyrocatechol isn’t only about shipping off clean drums or listing high-purity certificates. It’s built from a daily routine of accountability, learning, and practical improvement. Our buyers know they have real partners, not distant suppliers. We carry responsibility for not only technical numbers, but also the outcomes customers experience—project confidence, reliable supplies, safe practices, and a base for creative new developments. From all the daily routine of sample checking, packing, and problem-solving, we’re reminded that responsible chemical manufacturing means working together across company lines and country borders, sustaining not just production but trust across every batch and every year.