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HS Code |
280196 |
| Chemical Name | 4-Chlorophenylhydrazine |
| Synonyms | p-Chlorophenylhydrazine |
| Molecular Formula | C6H7ClN2 |
| Molar Mass | 142.59 g/mol |
| Appearance | Off-white to pale yellow solid |
| Cas Number | 3162-98-9 |
| Melting Point | 88-91°C |
| Solubility | Slightly soluble in water, soluble in organic solvents |
| Density | 1.22 g/cm³ |
| Smiles | ClC1=CC=C(C=C1)NN |
| Storage Conditions | Store in a cool, dry, well-ventilated place |
As an accredited 4-Chlorophenylhydrazine factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Packaged in a 100g amber glass bottle, 4-Chlorophenylhydrazine is labeled with hazard symbols, chemical identity, and safety instructions. |
| Shipping | 4-Chlorophenylhydrazine is shipped in tightly sealed containers, protected from light and moisture, and clearly labeled as hazardous. Transportation follows all local, national, and international regulations for toxic and potentially combustible chemicals. Proper documentation and safety data sheets accompany all shipments to ensure safe handling and compliance throughout the shipping process. |
| Storage | 4-Chlorophenylhydrazine should be stored in a cool, dry, well-ventilated area, away from sources of ignition, heat, and incompatible materials such as strong oxidizing agents and acids. Keep the container tightly closed and protected from light. Proper chemical storage cabinets, clearly labeled, are recommended. Use secondary containment if necessary, and follow all local regulations for hazardous substances. |
Applications of 4-Chlorophenylhydrazine in Industrial ManufacturingAs a direct manufacturer of 4-Chlorophenylhydrazine, we enable global formulators and processors to access consistently high-purity grades tailored for demanding synthesis environments. Our production supplies key sectors where this intermediate supports regulated and specialized workflows, ensuring predictable reactivity and safe large-scale conversion. Below, we detail principal industrial applications grounded in verified downstream use cases. 1. Pharmaceutical Intermediates for Pyrazole Derivatives4-Chlorophenylhydrazine serves as an essential starting material in the synthesis of pyrazoles and substituted heterocycles, which function as core scaffolds in various regulated active pharmaceutical ingredients (APIs). API manufacturers integrate it during hydrazone condensation steps with β-diketones or related carbonyl substrates, with precise molar balances to minimize risk of impurities. Finished APIs must pass stringent pharmacopoeial controls, driving the need for tight raw material specification and lot-to-lot traceability. Industry compliance standards
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2. Agrochemical Active SynthesisIn the crop protection sector, 4-Chlorophenylhydrazine participates in constructing hydrazone-bridged moieties and triazole linkers for use in fungicide and herbicide actives. Agrochemical manufacturers rely on precise input ratios and validated process routes, where this intermediate’s handling requires compliance with worker safety and export control frameworks. Industry compliance standards
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3. Synthesis of Dyes and PigmentsDownstream producers of specialty azo and hydrazone dyes use 4-Chlorophenylhydrazine as a coupling partner in the diazotization sequence central to manufacturing colorant intermediates. Its controlled addition supports batch and continuous colorant production under standardized quality regimes relevant to textile and ink markets. Industry compliance standards
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4. Fine Chemical Synthesis for Analytical ReagentsProducers of laboratory and diagnostic reagents employ 4-Chlorophenylhydrazine for stable preparation of hydrazone-linked chromogenic compounds. Tight control over feedstock qualification and trace metal limits sustains batch reproducibility, which analytical chemistry suppliers monitor through independent release testing. Industry compliance standards
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5. Chemical Reference Standards and Impurity ProfilingQuality control laboratories and custom synthesis units require 4-Chlorophenylhydrazine to prepare trace-level reference materials for chromatography calibration or GC-MS method validation. Handling and usefall under documented QA oversight, supporting the life sciences, analytical, and regulatory reporting supply chains. Industry compliance standards
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Every kilo of 4-Chlorophenylhydrazine that leaves our plant carries with it the legacy of hands-on experience and years of challenging development. Producing specialty chemicals isn’t about simply hitting a purity marker or matching a price point. Over time, we’ve learned that even minor shifts in feedstock quality or plant conditions can affect batch consistency. Our team tackles this head-on in the plant each day, not in boardrooms or lab presentations. We see 4-Chlorophenylhydrazine go from raw material to finished product, and we don’t sign off until it actually matches the rigorous specifications that our customers rely on.
4-Chlorophenylhydrazine (CAS: 637-60-5) starts with chlorinated aromatic chemistry, which demands close control at each distillation and filtration step. Our manufacturing lines have evolved through years of tweaks, driven by real-world feedback from users who required higher purity, lower color, and stable handling characteristics. Each batch demonstrates a laboratory-verified purity level above 98%, and we maintain strict controls on trace by-products, including heavy metals and related hydrazine derivatives.
Technical teams often ask about physical form because it directly impacts how the chemical feeds into their processes. We supply this compound as a pale crystalline solid, dense enough to be scooped or weighed with minimal dusting. This improves operator safety and eliminates much of the mess encountered with finer-particulate grades from less experienced makers.
Over the years, our 4-Chlorophenylhydrazine has earned its place on benches in research labs and production lines worldwide. It acts as an effective building block in the synthesis of pharmaceuticals, especially as a coupling partner in heterocyclic compound synthesis. Many downstream products – from pyrazoles to triazoles – trace their origin to this intermediate. Our staff listens carefully to what works for customers in real plants, not just under the controlled conditions of a pilot line.
In pharmaceutical R&D, the pressure to deliver pure compounds is intense. Side impurities in 4-Chlorophenylhydrazine can inactivate catalysts, contaminate API intermediates, or even trigger wasteful purification steps. We have re-engineered our processes and cleaning regimes around this reality, setting a real-world specification for related hydrazines and unwanted isomers that routinely outperforms what’s available from less-experienced sources.
Dye manufacturing plants have very different needs. Good filtration speed and batch-to-batch uniformity are vital, because each process stoppage costs both time and solvent. Our plant teams have modified filter beds and fine-tuned precipitation steps to ensure a reliable granular consistency, so production staff don’t waste hours troubleshooting variable slurries.
As chemists, we know that not all product labeled as "4-Chlorophenylhydrazine" performs equally. Technical specifications only tell part of the story. What matters in real applications often comes down to small differences — the way material dissolves, how trace contamination shows up on a chromatogram, or whether you can actually reproduce the same yield in every batch.
Other suppliers may boast of high assay but overlook issues with residual solvents or unstable storage. Ours leaves the reactor at a carefully controlled temperature to avoid decomposition. We use only closed-system packaging to prevent moisture uptake, which tends to accelerate discoloration and produce those off-odors that sometimes surprise new users.
In a few industries, the handling advantages alone make a clear difference. Operators are relieved when they meet granular material that doesn’t compact in hoppers or lead to inhalable particulates. We regularly receive unsolicited feedback from buyers who switched to our finished product because the change eliminated poor flow in their feeders or constant clean-up shifts from airborne dust.
Competitors sometimes cut corners that can be hard to spot on first inspection. We have traced root-cause failures in client plants back to the use of cheap feedstocks, poorly controlled reduction steps, or even repackaging-induced contamination. By running our own production lines from start to finish, and analyzing every finished lot before packaging, we sidestep these pitfalls.
Practical considerations drive much of our ongoing manufacturing development. Warehouse staff try to avoid spending hours chiseling compacted product out of drums. Chemists want minimal foaming and a predictable melting range. EHS departments require clean labelling and strong evidence of impurity control. Lab managers prize clear certificates of analysis paired with genuine lot traceability. We have shaped our processes to support these needs, built from repeated customer dialogues after they’ve actually worked with our material.
Economics also drive our strategy. Waste resin and failed filtrations generate real cost, not just on our end but for every customer downstream. By putting in robust solvent recovery and off-gas control, we protect our margins and reduce surprises for buyers who count on consistent quality.
Stability is crucial. 4-Chlorophenylhydrazine’s shelf life can suffer when makers don’t understand the underlying chemistry. We control for temperature excursions throughout storage, monitor drum atmosphere, and watch for subtle signs of degradation that often foreshadow color changes or activity shifts. These controls track directly back to successful scale-up in plant settings, where any deviation can spell thousands in wasted time and material.
As the original manufacturer, we work from in-house safety data, not just copied literature. Our process teams have encountered issues at scale — from pressure spikes to exothermic runaway hazards — and have built safeguards into the plant that directly reflect these lessons. On the regulatory front, we produce up-to-date documentation for each lot, built from real analytical test data, not obscure summaries. This effort pays off when customers approach audits or register new products, because our information actually ties straight to the batches they receive.
We actively test for common heavy metal contaminants, including lead and mercury, both due to downstream pharmaceutical requirements and from lessons learned during quality investigations years ago. Our analysis doesn’t stop at a single sample; we batch-hold finished goods until comprehensive results confirm compliance, ensuring no substandard lots slip through during high-demand periods.
Transportation specialists in our logistics teams have handled almost every hazard scenario involving 4-Chlorophenylhydrazine. The real world brings dockside delays, container leaks, and customs challenges, and our packaging practices – including choice of liners and drum materials – have all evolved step by step, based on what we learned through direct experience, not just on paper risk assessments.
Chemical manufacturing rewards those who invest in robust process development and steady process control. We’ve invested in both, taking feedback from every complaint and production success along the way. Our plant operators and QA chemists work hand in hand — nobody works in a vacuum or shelters behind paperwork. Real improvements, from batch traceability to improved particle stability, all grew out of direct responses to plant and customer experience.
We’ve made it a habit to go beyond minimum specs. Our analytical teams run GC-MS and HPLC for impurity profiling, even for minor side products that don’t appear on basic certificates elsewhere. Stability studies verify how well the product holds up across typical storage and shipping conditions. These are not paper exercises; we ship globally, and have seen every temperature, mishandling case, and packaging quirk in the market.
We frequently host visitors who want to see the process. Lab managers, purchasing teams, and quality assurance groups have walked our production floor, asked difficult questions, and left with a clear sense for what sets our process apart. Nothing beats seeing quality controls in action and meeting the people behind the product.
Every manufacturer faces problems: unexpected crystallizations, runaway color development, raw material shortages, supply chain shocks. What sets us apart is that we address challenges with transparency and quick adjustments. For instance, we experienced an incident with a by-product that required rapid process modification and batch quarantine until all checks cleared. We learned from the cause, refit the reactor, and upgraded the analytical checks permanently.
Quality documentation stands on real-life paperwork, not software templates downloaded off the web. Our certificates track back to real people who signed off. This traceability makes us accountable for every can shipped and gives procurement and regulatory specialists the paperwork they need for stress-free audits.
As with most hydrazines, worker health and environmental safety never fade into the background. We maintain certified dust extraction and pharmaceutical-grade PPE for all operators, and monitor airborne exposure with direct reading instruments — not just compliance paperwork, but daily routines.
For sustainability, we've optimized our waste streams and solvent reuse, both to keep operating costs sensible and to meet tightening regulatory pressures. On-site recovery units mean waste can be minimized on the production floor, not just shipped out and forgotten. These investments pay off over time, producing not only cleaner streams but more secure supply for everyone downstream.
Over the years, customer feedback has driven most of our improvements. The difference comes from taking that feedback seriously, and building personal connections between technical teams. People don’t just want a chemical, they want an answer to how it will behave in their process — and to know that any problem will receive a real fix, not an apology or finger-pointing at outside vendors.
Every kilo of our 4-Chlorophenylhydrazine reflects commitment to the field: clear input controls, expert production teams, rigorous quality systems, and solutions shaped by hands-on experience. We welcome scrutiny and share a production philosophy rooted in transparency, reliability, and continuous improvement based on genuine plant feedback.