|
HS Code |
831221 |
| Cas Number | 90-13-1 |
| Molecular Formula | C10H7Cl |
| Molar Mass | 162.62 g/mol |
| Appearance | Colorless to pale yellow oily liquid |
| Melting Point | -17 °C |
| Boiling Point | 260-263 °C |
| Density | 1.18 g/cm³ at 20 °C |
| Refractive Index | 1.661 at 20 °C |
| Flash Point | 113 °C (closed cup) |
| Solubility In Water | Insoluble |
| Odor | Aromatic |
| Vapor Pressure | 0.09 mmHg at 25 °C |
As an accredited 1-Chloronaphthalene factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | 1-Chloronaphthalene is packaged in a 250 mL amber glass bottle with a secure screw cap, labeled with hazard information. |
| Shipping | **1-Chloronaphthalene** should be shipped in tightly sealed, chemical-resistant containers, clearly labeled, and packed to prevent leaks or spills. It is transported as a hazardous material under UN number 3082 (Environmentally hazardous substance, liquid, N.O.S.), requiring compliance with ADR, IMDG, and IATA regulations. Keep away from heat and incompatible substances. |
| Storage | 1-Chloronaphthalene should be stored in a tightly closed, clearly labeled container in a cool, dry, and well-ventilated area, away from sources of ignition, heat, and direct sunlight. Keep it separated from oxidizing agents and acids. Ensure storage locations are equipped with spill containment and appropriate fire suppression measures. Use only in areas with proper ventilation and follow all applicable safety regulations. |
Applications of 1-Chloronaphthalene in Industrial ManufacturingAs a direct manufacturer of 1-chloronaphthalene, we supply this specialty aromatic compound to downstream producers operating across key industrial sectors. Below, we detail the established application scenarios, clarifying compliance obligations, additive dosages, formulation procedures, and the primary finished goods produced in each domain. 1. Liquid Crystal Intermediate Synthesis for Display Manufacturing1-Chloronaphthalene serves a pivotal function in synthesizing specific liquid crystal intermediates, notably those employed in advanced nematic and smectic liquid crystal formulations used by display manufacturers. Chemical companies introduce the material as a halogenated raw intermediate during the preparation of biphenyl and terphenyl derivatives. The reaction typically integrates chloronaphthalene via controlled halogenation or coupling to derive custom-engineered liquid crystal cores, where isomeric purity and trace impurity control directly affect the downstream photonic properties of display panels, especially in TFT-LCD and OLED fabrication lines. Industry compliance standards
Typical usage ratio
Downstream process integration
Final product types
2. Inert Solvent for High-Temperature Dye and Pigment SynthesisProducers of synthetic organic pigments and dyes exploit 1-chloronaphthalene's chemical inertness at elevated temperatures, leveraging its high boiling point to dissolve and carry precursors in high-temperature azo coupling and condensation reactions. The raw material acts as a non-reactive solvent phase, enabling precise temperature control and product recovery, particularly in processes generating heat-sensitive pigments such as phthalocyanines and quinacridones where conventional aromatic solvents are too volatile or reactive. Industry compliance standards
Typical usage ratio
Downstream process integration
Final product types
3. Transformer and High-Voltage Insulation Fluid AdditiveWithin the electrical equipment industry, transformer oil compounders previously formulated high-voltage insulation fluids using halogenated aromatics. 1-Chloronaphthalene provides specific dielectric strength and oxidative stability when added at controlled ratios. Its utility applies today in specialized closed-system, retrofitted, or legacy equipment, where regulatory-compliant limits remain observed, maximizing compatibility with mineral oil bases while suppressing partial discharges and enhancing insulation life in critical transformer applications. Industry compliance standards
Typical usage ratio
Downstream process integration
Final product types
4. Standard Reference Material and Calibration Solution for Analytical ChemistryCertified solution and CRM (Certified Reference Material) producers incorporate high-purity 1-chloronaphthalene to formulate calibration standards for environmental, forensic, and industrial laboratories. Owing to its thermal stability and distinct chromatographic signature, labs employ the substance as an internal or external standard in GC, LC, and MS applications for quantification of halogenated aromatic contaminants and performance validation of instrument workflows in compliance with international testing standards. Industry compliance standards
Typical usage ratio
Downstream process integration
Final product types
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One of the main products coming out of our plant these days is 1-Chloronaphthalene. We make this compound in ton lots, so it’s no stranger to our supervisors and line crew. To someone unfamiliar, the name sounds like a mouthful. In a chemist’s lab, it’s just another chlorinated aromatic hydrocarbon, fair enough, but the depth of experience managing and transforming it shows up on the shop floor and in the warehouses where the stuff actually moves.
We have worked for years listening to customer feedback and keeping production audits tight. 1-Chloronaphthalene flows out of the distillation columns in crystal-clear form, with specifications tuned to the actual end-use. For us, quality is not only a figure on the analysis certificate. It’s clarity, storage stability, and the confidence that comes from routine batch checks. Each lot we release comes off lines that we constantly calibrate against tightly controlled GC and titration standards. Our reputation rides on reliable processes, not just well-worded promises.
On the line, it’s easy to spot the difference between a batch built for lab trials and something built for ongoing process work. Volunteers for the former might get by with the odd impurity. People designing larger-scale applications always ask, “Can you keep the side chlorinated compounds under 0.5%?” That’s the real day-to-day challenge — keeping each batch inside narrow spec windows. That means our maintenance team treats reactor leaks and distillation setpoints with the seriousness they deserve. We don’t chase purity for the sake of chasing purity. We do it because too much contamination in 1-Chloronaphthalene creates headaches everywhere it’s used, from formulation tanks to finished product QA.
1-Chloronaphthalene carries its own unique balance of boiling point, density, and miscibility. Unlike heavier chlorinated aromatics, its boiling point sits in the middle range, making it less volatile in the plant but still easy enough to distil and handle. Anyone with enough cycles through the reactors knows too high a chlorine load makes storage and waste disposal tougher; too light, and the solvent power drops. We reach a sweet spot by holding the chlorine substitution at exactly the first position, keeping the rest of the molecule unmodified. This control makes filtration, drying, and downstream blending smoother for end users.
Staff rarely mention melting point or refractive index except in lab checks, but solvent power, toxicity, and compatibility with common vessels matter to anyone receiving 1-Chloronaphthalene in bulk. Our logistics supervisors test drum linings and monitor for seepage to avoid “container memory.” Over the years, we have found that no two customers handle bulk solvents exactly alike, so we stick with commonly accepted steel drums lined with polyethylene or, for extra warning, resin-coated totes if users are especially sensitive to contaminant leaching.
Customers in synthetic chemistry seek out 1-Chloronaphthalene because of its solvation power and resilience under thermal stress. As a solvent for spectral work and as a heat-transfer material in specialized equipment, this compound stands out where lighter aromatics break down or evaporate too fast.
In dye and pigment manufacturing, the need for a strong aromatic solvent capable of dissolving intermediates without breaking up during the cookstep influences both product and process choices. Customers who use our material know we keep the ortho- and para-chloro isomers controlled, as even small differences here change the solubility patterns and can trigger precipitation or color shifts. We dial in the proportion of 1-Chloronaphthalene with enough precision to keep dye-makers from dealing with “mystery phase splits.”
Laboratory users tell us they rely on our clear, low-absorbance product for microscopy mounting and refractive index measurements, because only one contaminant isomer can throw off sensitive optical readings. We make extra effort to minimize yellowing by avoiding iron and copper contamination during synthesis, which requires stricter maintenance of the reactor internals than might appear in the big engineering diagrams.
We manufacture several grades of 1-Chloronaphthalene, keyed to customer expectations. Our regular industrial product supports bulk coatings and chemical synthesis work, while a higher-purity variant — sometimes called “spectroscopic grade” — comes off a separate finishing line, packed to prevent cross-contamination. This isn’t marketing talk. The difference between 98.5% and 99.5% purity means something real to a person running sensitive production-scale nitration or needing consistent spectra.
Feedback from the field led us to add more controls on water activity and halogen balance. There’s an ongoing push to eliminate traces of 2-Chloronaphthalene, so our technical team built custom analytical protocols to check for it before every batch moves to the warehouse. Many manufacturers settle for industry-average levels. We stick to stricter cutoffs because it directly improves end-user confidence, especially for those putting 1-Chloronaphthalene into research or fine chemical applications.
As regulatory needs change, so do our grades. If a customer has a restriction on polychlorinated byproducts or metals, we can run custom purification streams. It takes extra time, but that step shows up in the feedback loop. Those who’ve seen their production lines foul up from mystery “black tar” know the value of starting with carefully controlled material. We also offer documentation that traces each batch by both raw material lot and final product test. We don’t use flashy names or “premium” labels, just a number and a guarantee that matches long-term partners’ requirements.
Industrial chemists, R&D groups, and specialty manufacturers often invite us to see how our 1-Chloronaphthalene runs on their own equipment. Direct observation beats armchair theorizing every time, so we send our team out to see everything from batch polymerization to small-scale analytical preparations. Most of our clients lean on this product as a solvent for high-temperature reactions, naphthalene-based dye intermediates, or in temperature-controlled baths for metallographic and geological analysis.
In practice, temperature stability across several hours of operation matters as much as stated boiling points. Our engineers design handling protocols based on real-world feedback, like the need to minimize residue inside reactors or to ensure safe transfer under negative pressure to avoid exposure. For spectroscopists and geologists mounting crystals, transparency and low background absorbance prove crucial. Our spectroscopic grade gets checked against reference standards each week, not just once per quarter, to support these applications.
A smaller group uses 1-Chloronaphthalene for pesticide or agrochemical research. Here, minimizing contaminants is especially important — a key difference from industrial blends sold elsewhere. To keep up, we focus internal training for our QC staff on differentiating between allowable side products and critical restricted residues, following international guidelines and sharing feedback with buyers. If one batch shows drift on halide balance, we pull it before shipment.
Some customers still ask whether 1-Chloronaphthalene stands up to polymer compatibility as well as time-tested solvents like chlorobenzenes. What we see in practice is distinct: where tighter boiling solvents strip polymer films or etch glassware, our material leaves less residue. Factory cleanup shifts from hours of solvent scrubbing to a far simpler rinse. Staff, not just managers, notice that difference, which speaks to ongoing value beyond the lab table.
Standing in the shoes of a producer, it’s worth reflecting on what sets 1-Chloronaphthalene apart from other solvents in our inventory and from what rival manufacturers sell. Chemically, its closest relatives — 2-Chloronaphthalene and polychlorinated naphthalenes — show different solubility, boiling curves, and toxicology profiles. The extra chlorine in poly-substituted naphthalenes boosts heat resistance, but also bumps up toxicity, environmental persistence, and makes handling rules stricter at every step. Our field techs talk regularly with buyers who want maximum solubility without the long-term regulatory headache.
Compared to single-ring chlorinated compounds, like monochlorobenzene, 1-Chloronaphthalene washes out less easily and won’t evaporate as quickly from open tanks. The mild odor, heavier molecular weight, and higher boiling point combine to give it different worksite behavior. Operators handling open bath systems or hot transfer lines favor our product because it gives noticeably less vapor loss and requires less top-up during extended plant runs.
Some users raise alternatives such as trichlorobenzenes or even non-aromatic chlorinated solvents. Our experience has shown that switchovers to those compounds often cause unexpected compatibility or safety problems, sometimes due to overlooked regulatory flags — new workplace exposure limits, more hazardous waste classes, and higher transport costs. We keep these factors in mind and document batch-to-batch uniformity closely to build trust on chemical performance, storage, and worker safety.
Another factor comes up in optical uses. The refractive index for 1-Chloronaphthalene falls ideally between lighter aromatics and denser polychlorinated solvents — useful for mounting mineral samples or for refractive testing in the glass and crystal industries. Customers working with sensitive optical gear find less sample interference from our higher-purity grades. They’ve pointed to the subtle yellowing or clouding they spot in competitor material, which we’ve worked to minimize using tight purification and better control over supply chain raw materials.
No solvent manufacturer overlooks the importance of safe handling, and we treat 1-Chloronaphthalene with respect on every shift. Our site managers invest in operator training across the plant for both routine transfer and emergency containment. Valves, pumps, and fittings are periodically rebuilt; storage tanks are checked for moisture and temperature shifts. Pre-shipment inspections and drum sampling tests are built into our loading schedules — this didn’t happen overnight, but came by learning from minor leaks, drum swelling, or reactions with old washer seals in the past.
Operators who have worked with more reactive, polychlorinated naphthalenes appreciate that 1-Chloronaphthalene handles with fewer safety restrictions. Nonetheless, we keep spill kits and absorbents on hand precisely because the oiliness and moderate volatility can still surprise the unprepared. Over the years, we have phased out problematic packaging materials that used to cause product breakdown and switched to higher-grade liners and seals. Cross-checks by our warehouse team turned up the fact that drum gaskets, not always given much thought, sometimes contributed to subtle product changes. Rectifying these small issues has made a big difference in how the product holds up during long-term storage and after repeated opening.
For shipments, our logistics crew plans routes and timing to minimize heat spikes and avoid freezing, because real-world transit rarely matches lab storage conditions. On customer visits, we share our own drum management tips to keep quality stable. Technicians appreciate practical advice more than theoretical shelf-life figures. Our typical batch runs last weeks, sometimes months, so planning for consistency in field use is as vital as routine lab verification.
Chemical manufacturing doesn’t stand still. Environmental rules, customer expectations, and new applications keep shifting the requirements for 1-Chloronaphthalene. Over the past decade, we’ve responded to more frequent customer requests for documentation over every batch movement — tracking not just the purity, but also traceability of raw materials and waste management. The push for greener production methods influences our purchase of chlorine sources and choices of energy sources for our plant operations.
We stay close to user input through regular calls and field trials. Users struggling with government audits or product approvals count on our full disclosure of test results and willingness to provide trial sample runs. Several long-term clients have returned to us after failed experiences with low-quality imports, underscoring the importance of local expertise, responsiveness to problems, and established quality records. These relationships guide the priorities of our plant engineers and QC group, directing attention to issues that may not always show up in raw analytics: color drift, micro-residue, or long-term drum compatibility.
On process changes, we maintain open channels for customer suggestions. If something doesn't meet expectations, we review process control logs to find the source rather than hiding behind certificates. Real experience supplying 1-Chloronaphthalene in bulk — not just as a lab-scale specialty — means learning from unexpected customer challenges, like scaling up for new polymer syntheses or switching dye batch sizes. The feedback loop never closes, which is why we train staff to view each shipment as a learning opportunity.
We know the chemical industry rewards consistent performance more than big marketing language. Our 1-Chloronaphthalene stands on its production record, field reliability, and steady upgrades based on real use. Competitors may claim similar purity, but maintaining that batch after batch, drum after drum, and year after year comes down to discipline and learning on the job. Open lines to our plant, flexible order sizes, and detailed analytics — not just a stock certificate — define what we deliver.
Our approach is not built on chasing every new market, but on following the serious work of customers who scale new chemical solutions. Over the years, most of the real learning happened not on catalog covers, but in walking plant lines and receiving direct calls from users faced with genuine production challenges. Those lessons shaped our 1-Chloronaphthalene’s consistent quality, practical handling methods, and our ongoing responsiveness as regulatory and market demands evolve.
Supplying this product puts us in partnership with users — not wholesalers, not resellers, but the people who put our chemical directly into their formulations and manufacturing work. Keeping their feedback front and center is what sustains both the product quality and the working relationships behind it. If you’ve worked with lower-grade imports, batch-to-batch headaches, or unreliable certification, you’ll know the value of direct access to a committed manufacturer. That’s our way of building value and reliability into every shipment.