| Names | |
|---|---|
| Preferred IUPAC name | 1,4-dichlorobenzene |
| Other names | para-Dichlorobenzene p-Dichlorobenzene p-DCB Paramoth Paracide Cloresene Parazene |
| Pronunciation | /ˈwʌn, fɔːr daɪˌklɔːr.oʊˈbɛnˌziːn/ |
| Identifiers | |
| CAS Number | 106-46-7 |
| Beilstein Reference | 1209232 |
| ChEBI | CHEBI:25456 |
| ChEMBL | CHEMBL1409 |
| ChemSpider | 5295 |
| DrugBank | DB00874 |
| ECHA InfoCard | 03a61cf4-8f6e-45b6-baa6-9d3f93f3f4be |
| EC Number | 203-400-5 |
| Gmelin Reference | 15202 |
| KEGG | C01480 |
| MeSH | D004047 |
| PubChem CID | 7565 |
| RTECS number | GE7350000 |
| UNII | LB1J8LOX7D |
| UN number | UN3077 |
| Properties | |
| Chemical formula | C6H4Cl2 |
| Molar mass | 147.00 g/mol |
| Appearance | White crystalline solid |
| Odor | Aromatic; penetrating |
| Density | 1.247 g/cm³ |
| Solubility in water | 0.08 g/100 mL (20 °C) |
| log P | 3.44 |
| Vapor pressure | 8.36 mmHg (25°C) |
| Acidity (pKa) | 14.5 |
| Basicity (pKb) | 12.7 |
| Magnetic susceptibility (χ) | -72.7×10⁻⁶ cm³/mol |
| Refractive index (nD) | 1.553 |
| Viscosity | 3.20 mPa·s (25 °C) |
| Dipole moment | 2.33 D |
| Thermochemistry | |
| Std molar entropy (S⦵298) | 143.3 J⋅mol⁻¹⋅K⁻¹ |
| Std enthalpy of formation (ΔfH⦵298) | -96.3 kJ/mol |
| Std enthalpy of combustion (ΔcH⦵298) | −3278.3 kJ·mol⁻¹ |
| Pharmacology | |
| ATC code | D08AX04 |
| Hazards | |
| Main hazards | Harmful if inhaled or swallowed; causes skin and eye irritation; may cause allergic skin reaction; suspected of causing cancer; toxic to aquatic life with long lasting effects |
| GHS labelling | GHS02, GHS07, GHS08 |
| Pictograms | GHS07,GHS09 |
| Signal word | Warning |
| Hazard statements | Hazard statements of 1,4-Dichlorobenzene (p-DCB): "H302, H315, H319, H332, H351, H410 |
| Precautionary statements | P210, P261, P264, P273, P302+P352, P305+P351+P338, P312, P332+P313, P337+P313, P362+P364 |
| Flash point | ~66°C |
| Autoignition temperature | 379°C (714°F) |
| Explosive limits | 2.5%–13% |
| Lethal dose or concentration | LD50 (oral, rat): 500 mg/kg |
| LD50 (median dose) | LD50 (Median dose): 500 mg/kg (oral, rat) |
| NIOSH | NIOSH: SF2100000 |
| PEL (Permissible) | 75 ppm, 450 mg/m³ |
| REL (Recommended) | 10 ppm (60 mg/m³) |
| IDLH (Immediate danger) | 75 ppm |
| Related compounds | |
| Related compounds | benzene chlorobenzene 1,2-dichlorobenzene (o-DCB) 1,3-dichlorobenzene (m-DCB) trichlorobenzenes hexachlorobenzene |
| Property | Details | Technical Commentary from Manufacturer Perspective |
|---|---|---|
| Product Name | 1,4-Dichlorobenzene | Commonly recognized by technical and purchasing departments for its consistent aromatic chlorinated profile. Each batch is referenced against established QC release criteria specific to our process route. |
| IUPAC Name | 1,4-dichlorobenzene | The IUPAC designation is used for regulatory paperwork and international transport documents, ensuring compliance during cross-border shipments under chemical control regimes. |
| Chemical Formula | C6H4Cl2 | Production supervisors monitor the dichlorination stage to target the para-substitution. The chemical formula guides stoichiometry checks at several stages from raw material input to final blending, especially for contract or toll-manufacture orders. |
| Synonyms & Trade Names | p-DCB, para-Dichlorobenzene, p-Dichlorobenzol, p-DCB, Paracide, Paramoth | Labeling on shipping containers reflects regional regulatory expectations and reference names in customer purchase specifications. Product synonym use varies by end-market–for example, certain grades for deodorizer suppliers, moth control, or intermediate use in organic synthesis will affect labeling and documentation. |
| HS Code & Customs Classification | 2903.69 | For customs clearance, the product aligns with aromatic halogenated hydrocarbons. This classification directs required export documentation for bulk shipments versus specialty drum lots. Any regional variation in interpretation of customs headings will require supporting documentation, typically handled by technical exports compliance staff. |
In industrial production, 1,4-Dichlorobenzene appears as white to off-white crystalline solid with a distinctive, penetrating aromatic odor. The purity, and consequently appearance, aligns with grade requirements. High-purity grades used for electronic or pharmaceutical intermediates require tighter control, minimizing off-color and particulate matter compared to technical-grade material utilized in disinfectant or deodorant blocks.
Typical melting point and boiling point values correlate with purity and impurity presence, which can slightly depress melting point in lower grades. The crystalline form is stable under controlled warehouse temperatures; care during packaging prevents particle agglomeration or block formation under pressure or humidity excursions.
The odor presents operational considerations for packaging and storage—strong in confined spaces, requiring ventilated enclosures or local extraction during weighing and filling.
p-DCB remains structurally stable under process and normal storage conditions, but direct contact with oxidizing agents or strong acids can lead to decomposition, releasing hazardous byproducts such as chlorinated phenols or phosgene-type gases. Storage engineering controls target atmosphere exclusion and segregated warehousing to circumvent accidental contact with incompatible materials. Reactivity becomes more pronounced in high-temperature synthesis settings, catalyzed conversions, or under photolytic conditions.
The solubility profile depends on the solvent system; p-DCB exhibits limited solubility in water but dissolves readily in organic solvents like ether, benzene, or chloroform. For formulation or reaction charging, dissolution procedure is tailored: for downstream sulfonation or coupling steps, selection of solvent impacts phase behavior and impurity carryover. Process efficiency relies on correct solvent match to minimize crystallization losses during transfer or agitation.
Specification criteria differ sharply by industrial, pharmaceutical, or technical grade requirements:
Each production lot undergoes release testing against internal criteria set as per buyer application. In absence of universally unified standards, contractual specifications guide acceptable limits.
Main sources of impurities include isomeric dichlorobenzenes, monochlorobenzene, trichlorobenzene, and unreacted toluene or benzene, depending on route and feedstock. Impurity levels trace to catalyst selection, reaction temperature, and degree of chlorination. Post-reaction, distillation and crystallization act as corrective steps; for high-purity applications, further purification or recrystallization becomes necessary. Impurity targets are tied to the grade, process, and regulatory requirements.
Routine lot release tests employ GC or HPLC for purity and impurity determination. Solid-state purity may require melting point range and colorimetric analysis. Analytical methods and standards closely follow customer or regulatory references, but detailed methods are refined internally to capture production-specific impurity signatures. Deviations from reference profiles usually prompt process investigation or reprocessing.
Benzene or monochlorobenzene serves as principal feedstock. Chlorine gas is the active halogenating agent. Feedstock quality, particularly for pharmaceutical or high-purity grades, must ensure minimal sulfur, nitrogen, or metallic tramp elements. Feedstock homogeneity is tracked for each delivery to anticipate variability in chlorination efficiency and byproduct generation.
Industrial routes favor direct chlorination of benzene in the liquid or vapor phase. The process employs ferric chloride or aluminum chloride as catalyst, with temperature regimes optimized to maximize the para-isomer share and suppress ortho/meta isomers. The target para-isomer forms preferentially under thermodynamic, solvent, and catalyst selected conditions. Byproduct isomers accumulate at altered ratios depending on temperature and catalyst deactivation; side reactions leading to poly-chlorinated and oxidative byproducts impact downstream purification load.
Key controls include:
Post-reaction, crude product undergoes multi-stage distillation—followed, if required, by repeated recrystallization and washings to limit color bodies and isomeric content. The choice and efficiency of purification steps are dictated by the grade, with higher purity demands justifying additional energy and yield trade-offs for tighter impurity exclusion.
Each batch is tracked from raw material receipt through processing records to final testing. Release relies on a combination of physical-chemical characterization, chromatographic profiling, and compliance to customer and regulatory order. Control charts flag deviations for immediate corrective action, securing batch-to-batch consistency as the foundation for downstream confidence in end use.
1,4-Dichlorobenzene serves as a precursor in nucleophilic aromatic substitution and coupling reactions; such reactivity allows synthesis of derivatives like phenols, anilines, or nitro-compounds. Each substitution pattern depends strongly on the choice of catalyst, nucleophile, and solvent.
Catalytic or chemical transformations of p-DCB routinely use copper, iron, or palladium for transition-metal-catalyzed functions, typically in high-boiling polar solvents or under phase transfer catalysis. Temperature setpoints and reaction times flex to accommodate downstream requirements—some processes favor high temperatures for rapid substitution, others lower temperatures to minimize side-product formation.
The manufacturing sector leverages p-DCB for the synthesis of polymers, agrochemical intermediates, and pharmaceutical actives. Process integration can direct crude product immediately to in-line transformation, or stock higher-purity grades for more sensitive or yield-dependent syntheses.
Long-term stability requires protection from direct sunlight, extremes of temperature, and atmospheric humidity. Storage facilities maintain controlled conditions, typically cool and dry, with provisions for gas-tight containers to minimize odor release and cross-contamination. Extended exposure to light or elevated temperatures encourages discoloration and sublimation loss, especially in poorly sealed packages.
Steel or lined drums, HDPE containers, and glass jars suit industrial storage; compatibility testing ensures no plasticizer extraction or permeation occurs, particularly for grades destined for sensitive applications.
Shelf life depends on purity, containment integrity, and warehousing discipline. High-purity material held under optimal conditions maintains characteristics over extended periods. Signs of degradation include color change, caking, and volatilization; such changes trigger re-qualification before use in customer processes.
Hazard classification follows international chemical safety conventions, reflecting the irritant and chronic exposure profile. p-DCB demands attention to inhalation and dermal contact risk, particularly in melting, handling, or bulk packaging operations.
Operations highlight the importance of engineering controls, such as local exhaust and sealed transfer points. PPE specification aligns with regulatory guidance, supporting minimized skin and respiratory exposure. Chronic hazard statements align manufacturing culture toward strict hygiene, change-out schedules, and exposure minimization.
Chronic toxicity has established exposure limits; handling guidelines mandate routine air monitoring in operational spaces and worker health surveillance. Training programs stress prompt response to spill, dust, and vapor risk. Cleaning and maintenance protocols integrate chemical compatibility checks and emissions logging. Emergency containment gear and neutralization agents remain positioned at all storage and usage sites.
In continuous production of 1,4-dichlorobenzene, several factors determine annual output. Plant utilization rates, feedstock reliability, and the frequency of major turnarounds drive actual available volume more than nameplate capacity. Quality grades—industrial, technical, and high-purity for electronic or specialty use—vary by purification step and demand. Output for downstream applications such as agrochemicals, moth repellents, and chemical intermediates shapes batch scheduling and determines which grade dominates available stock.
Lead time depends on integration of upstream chlorination of benzene, inventory position, and customer order pattern. Clients with regular drawdowns secured by annual contracts normally experience shorter notification-to-dispatch cycles. Make-to-order batches, especially for specialty grades, introduce scheduling constraints; orders matching minimum lot sizes protect batch consistency and reduce product changeover losses. Typical minimums align with drum or bulk container increments, except in custom-packed formats for research or electronics supply.
Industrial and technical grades ship in internal-coated steel drums, IBCs, or isotank containers for bulk consignees. Higher-purity packages rely on pre-cleaned drums, tamper-evident seals, and full secondary containment to isolate from trace contamination, especially for semiconductor use. Custom-labeled packaging becomes critical to traceability in regulated markets; packaging must ensure product identification, transport safety, and compatibility with intended handling systems.
Dispatch route influences risk and cost allocation: FCA, FOB, and CIF terms are common in Asia and Europe. Export to sensitive destinations triggers compliance with chemical export regimes and increased documentation. Standard payment terms—net 30 or secured letter of credit—reflect client rating and destination risk. For high-value specialty grades, advance payment or phased delivery models are often negotiated.
Chlorination route selection and benzene input cost dictate most of p-DCB’s variable cost. International crude oil and naphtha benchmarks impact benzene prices, while integrated operations may buffer cost volatility compared to external sourcing plants. Chlorine pricing connects to upstream electrolysis margins and energy market swings. Catalyst spend, purification energy demand, and labor represent lesser contributors but gain significance in low-margin environments.
Product price differences reflect both physical property tests and compliance with regional or sector certification: higher assay, tighter impurity limits, and certified batches for regulated applications routinely demand surcharges versus commodity grades. During benzene or chlorine supply shocks—feedstock force majeure, plant incident, or transport bottleneck—market-linked price escalators activate. Downward adjustments are rare unless oversupply forces margin erosion.
Grade and purity fundamentally separate price brackets. Bulk product for deodorizers or general solvents generally commands the lowest levels. Technical grade—used in pigment synthesis—incorporates stricter limits on oligomers and certain volatiles. Electronic grade requires trace and ultra-trace impurity control and validated packaging, and the release protocol embeds more detailed batch history. Packaging certification, such as UN transport approval or semiconductor-grade certification, amplifies cost, especially on short runs.
Production clusters reside in East Asia, India, Western Europe, and to a smaller extent, North America. End-use industries—agrochemicals, dye intermediates, deodorizer blocks—set regional demand patterns. Seasonal commodity demand in agriculture, and industrial policy adjustments, generate cyclical changes in order volume and stockholding policy.
United States and Japan focus on specialty-grade downstreams and reduced commodity capacity, with environmental controls narrowing available producers. EU producers face elevated operating costs from energy and stricter environmental regimes, and buyers increasingly require compliance documentation. China and India supply a greater share of technical and commodity-grade outputs, but both have increased exports of certified and high-purity material for global supply chains since 2022.
Forward pricing aligns with expected benzene and chlorine cost curves and forecasted tightening in Western producer capacity. Short-term volatility is likely from feedstock swings and logistics interruptions. Increasing regulatory compliance costs across the EU and US are expected to push the minimum price for certified grades up. As further environmental controls in China and India gain traction, export availability may become more grade-selective. Longer-term trends point to a premium for traceable, low-impurity, and regionally certified product, especially as more downstream users modernize their compliance programs.
Market insights derive from aggregated plant capacity reports, published commodity indices (ICIS, Argus), and internal historical price and volume records. Operating experience and third-party verification reports anchor forecasted regulation impacts and upcoming product releases.
Increased scrutiny of aromatic volatile organic compound emissions has led several jurisdictions to adjust handling and exposure recommendations for chlorinated benzenes, including p-DCB. Production stoppages or environmental incidents in East Asian clusters have prompted temporary changes in trade flows. Investment in process intensification technology promises tighter in-process control and increasing batch-to-batch consistency, particularly in facilities serving electronics and pharma clients.
New thresholds for workplace exposure published in Western markets require more frequent batch documentation and third-party certification. Stringency for REACH compliance in the EU triggers enhanced impurity profiling when exporting into the region. US TSCA regulatory notifications require ongoing review—a recurring internal audit protocol forms part of the standard compliance system.
Plants supply more detailed material traceability reports and offer expanded impurity testing on request. Cross-border supply partners ensure documentation meets regional regulatory requirements. Investment in closed-handling systems, real-time process analytics, and digitally traceable packaging supports both compliance and downstream risk management for sensitive end-users.
1,4-Dichlorobenzene (p-DCB) supports key production lines across the chemical, agricultural, and consumer sectors. In our operations, demand structure shifts seasonally: the agrochemical market remains strong owing to continued use as an intermediate in herbicide and pesticide manufacturing. For plastics, downstream polyesters and specialty resins account for a stable share, especially when precise reactivity and color stability take priority. In the dye and pigment segment, customers require grades that permit minimal interference with chromophore development. Disinfectant, deodorant block, and moth repellent producers often select for different impurity acceptance thresholds and packaging formats to match direct consumer contact and regulatory compliance.
| Downstream Application | Recommended Grade | Key Control Parameters |
|---|---|---|
| Agrochemicals (intermediate for herbicides/pesticides) | Technical Grade / Agro Grade |
Purity above minimum regulatory threshold to control active ingredient yield; Chlorinated impurities and moisture critically monitored to protect downstream synthesis routes |
| Dye and Pigment Synthesis | High Purity / Color-Sensitive Grade |
Trace organic contamination tightly managed to prevent byproduct coloration; Sulfur and iron contaminants are limited due to batch-to-batch consistency needs in color reproduction |
| Polyester/Engineering Plastics | Polymerization Grade |
Residual monomers and heavy metals kept below process-triggered levels; Particle size distribution may affect feeding system efficiency |
| Deodorant Blocks & Mothballs | Household/Sanitary Grade |
Volatile impurities controlled according to end-use exposure risk assessments; Additive compatibility and odor profile verified in final validation |
Industrial customers often ask about control points affecting downstream safety and performance. Purity remains the primary concern but is always defined in context. Some applications set strict boundaries on ortho- and meta-substituted chlorobenzenes, often requiring additional purification steps at the plant. Particle size and granulation, especially for pressing or direct tablet application, are tuned based on customer feedback and end-use processing equipment. For chlorinated organics, managing unwanted oligomers and moisture intake also ranks high for export customers.
Establish the target use, whether as an intermediate, raw material, or direct formulation component. Application in chemical synthesis often demands the grade that aligns with impurity profiles specific to those reactions (e.g., nucleophilic substitutions versus oxidative conditions). Consumer-product manufacturers may require an additional compliance certificate or odor test.
Domestic and international regulations diverge by application. Agrochemical intermediates must meet minimum regional standards, which may define contaminant thresholds not applicable in plastics or pigment production. For products destined for sensitive environments (household, personal care), local restrictions often dictate maximum allowable levels of volatile organics or residual solvents.
Industrial synthesis may tolerate minor levels of certain residuals if they do not affect process yields, but color-critical or polymer applications often escalate purity requirements—including controls on specific positional isomers or heavy metals. An open technical dialogue with end-user R&D and quality teams shortens troubleshooting cycles and matches analytical capabilities to the order specification.
Higher purity or specialty grades demand additional manufacturing steps and raw material input, impacting batch cost and overall supply timeline. Bulk users often optimize grade-to-cost balance, with select impurity thresholds negotiated by contract. The choice of packaging (bags, drums, bulk tanker) and shipment conditions also tie into volume and cost discussions.
Before finalizing longer-term supply, technical staff recommend sample-based validation under actual plant or lab conditions. Analytical reports from our in-house lab accompany each sample. Customer-side evaluation involves compatibility testing, process simulation, and, if needed, application-specific certification. The final supply grade depends on shared agreement between user requirements and technical feasibility from our side.
In a site audited regularly under global and industry-recognized standards, production adheres to comprehensive quality management systems. Facility-level certifications follow internationally acknowledged principles, typically ISO-based, with documented annual reviews and external verification of procedure alignment. All process line adjustments go through risk-based change control documentation, which ensures traceability for each lot from raw material intake to product shipment.
For 1,4-dichlorobenzene, local and international registration or compliance claims always derive from application or customer demand. Some grades of p-DCB require documentation to support regulatory, food contact, or environmental declarations; others address sectoral needs such as electronics, agrochemical, or intermediate applications. Certification coverage—Halal, Kosher, or export-specific—depends on batch isolation and raw material handling, verified batch-wise or campaign-wise. Details always reflect the actual grade, process, and customer audit requirement rather than any generic document.
Release documentation for each batch includes CoA (Certificate of Analysis) with measured properties per internal QC or jointly defined specifications. Supporting dossiers incorporate impurity tracking, chromatographic methods, and scale-up records when required by downstream regulatory registration. Repeat customers receive tailored documentation packs covering cross-referenced product traceability, with optional inclusion of audit trails, safety data, and supply chain transparency statements. Product records, including in-process controls and release criteria, are archived per the regulatory retention schedule with on-request access for verified partners.
Long-term relationships demand predictability and transparency in material flow. Core capacity for p-DCB manufacturing is anchored in integrated raw material sourcing and redundancy in production assets. Sourcing flexibility covers both planned and spot volumes, always anchored in monthly or quarterly capacity reviews. Production scheduling aligns with customer forecasts and is supported by dynamic allocation systems, with priority given to confirmed orders and framework agreements. Business models range from fixed-volume contracts with guaranteed delivery slots to flexible call-off arrangements for customers in variable demand sectors. Capacity adjustments respond to seasonal demand, raw material supply, or regulatory events, always communicated proactively through dedicated key account management channels.
Reliable supply of 1,4-dichlorobenzene draws on multi-line operation, on-site storage, and finished product buffer inventory. Process route selection always factors in supply chain risk—such as upstream interruptions or market volatility. Plant integration with on-site utilities, experienced logistics providers, and contingency storage underpins continuity for both routine and spot transactions. For high-volume or critical-grade contracts, ongoing review of supply chain stress points, including periodic supplier audits, ensures robustness against upstream disruptions and regulatory shifts. Major accounts receive supply performance reports and advance notice of campaign or shutdown schedules.
Technical and procurement teams jointly manage pre-commercial sampling programs. Requests require application description and, if available, target specification set by the end-use or regulatory requirement. Each sample batch shipped for industrial evaluation comes from full-scale production—never laboratory scale—to match actual impurity footprint and morphology profile. Sample documentation includes a CoA and a handling and safety advisory, as well as chain-of-custody tracking to validate representativeness. Feedback protocols include side-by-side testing observations and iterative specification refinement dialogue.
Customer engagement modes cover short-notice supply, consignment, VMI, and just-in-time delivery under both spot and framework agreements. For volume-sensitive users, production allocation and shipment scheduling adapt to process line turnarounds or demand peaks, reflecting direct coordination between planning teams and customer operations. Multi-grade requirements or transition between grades are managed through batch isolation, dedicated storage, and cleaning verification. Payment terms, shipping methods, and packaging formats customize according to application, country-specific regulation, or logistical constraint, outlined transparently before cooperation confirmation. Technical and account support respond to changes in order pattern, specification shift, or regulatory compliance, supporting stable and collaborative procurement partnerships.
Production teams see intensified efforts to refine the chlorination process. Persistent attention focuses on minimizing undesirable isomer formation such as 1,2- or 1,3-dichlorobenzene, as downstream applications in moth repellents, deodorizers, and intermediate synthesis demand high isomeric purity. Improvements in catalyst systems and process conditions aim to lift selectivity at industrial scale. Environmental controls target vent stream management and closed-loop operations, reflecting a marked industry drive for lower fugitive emissions.
Beyond traditional uses, interest grows around specialty polymers and advanced materials, especially where aromatic chlorination contributes key performance attributes like flame retardancy, chemical resistance, or thermal stability. Some R&D initiatives examine p-DCB as a controlled-release carrier in agrochemical formulations. Attention to these applications directly influences how impurity controls and trace residuals are managed, especially where downstream polymer or electronic material manufacturers require low-odor, low-trace-metal p-DCB grades.
Manufacturing teams address batch-to-batch control of residual monochlorobenzene and polychlorinated byproduct profiles, as certain downstream formulations show sensitivity to trace impurities. Process engineers invest in debottlenecking purification steps, including advanced distillation or crystallization design. Breakthroughs stem from process intensification and real-time analytics that cut energy use and boost purity. These advances heavily shape how QC teams define release specifications for region-specific or customer-specific grade requirements.
Market growth typically tracks the downstream demand from mothball, deodorizer, and intermediate sectors. In regions tightening on indoor air quality standards, penetration in traditional uses may taper, but demand for intermediate production in high-performance materials and niche applications could offset this trend. Price movements and availability will likely hinge on both raw benzene costs and regulatory dynamics directing allowable emissions during production.
Technical direction points toward more closed-loop and integrated manufacturing approaches. Greater automation in dosing and vent recovery helps operators decrease waste and energy loss. Adoption of more robust solid catalyst systems emerges as a focus area, as these can limit byproduct variance compared to earlier liquid-phase or direct chlorination methods. Customers show increasing interest in batch documentation and traceability, leading to continual improvements in process analytics and digital oversight.
Sustainability targets take shape chiefly around raw material efficiency and emission management. Efforts aim to maximize chlorination yield per input, minimize overall solvent use, and recover or destruct vented chlorinated organics using advanced abatement units. Green chemistry initiatives spur process water and energy recycling within the facility. QC stakeholders assess each grade’s ecological footprint based on input-output reporting and disposal route definition as required by regional compliance.
Support teams engage directly with formulators and technical specialists on grade selection, particularly where final product odor, purity, or downstream reactivity drive differentiating requirements. Consultations address solvent compatibility, material compatibility for storage and transfer equipment, and batch record interpretation for regulatory assurance purposes.
Process and R&D experts assist downstream users in adjusting process parameters to optimize yield or handling of p-DCB, especially when high throughput or narrow impurity limits matter. Direct support extends to troubleshooting crystallization, storage stability, blending, and emission issues that can arise when transitioning between grades, sources, or process operations.
Quality management teams back each batch with retained sample verification, COA documentation, and rapid investigation pipelines should a customer-reported deviation or off-grade incident occur. Regional teams manage logistics, storage recommendations tailored to climate and infrastructure, and periodic grade reviews based on customer feedback and audit results. Procedures for product return or replacement align with both internal compliance and customer specifications as captured at the order point.
We manufacture 1,4-Dichlorobenzene in-house, drawing on decades of chemical production experience. Our process starts with the chlorination of benzene in tightly controlled operations. Production lines integrate advanced purification stages, removing residual isomers and minimizing impurities throughout synthesis and recrystallization. By operating reactors, separation units, and QA labs under one roof, we maintain full oversight from raw material intake to final product packaging.
1,4-Dichlorobenzene supports a large share of the chemical sector. In plastics, resin producers use p-DCB as an intermediate to synthesize polyphenylene sulfide (PPS), a performance polymer with strong chemical resistance for electronics and automotive parts. Dye manufacturers rely on p-DCB as a precursor for pigment molecules. The deodorizing sector uses p-DCB in blocks and cakes for odor control in municipal and commercial sanitation systems, as the molecule possesses stable volatility and strong efficacy against odors. For pesticides and biocides, it forms the backbone for moth repellent formulations. Our teams understand the technical requirements and scale-up nuances unique to each of these industries.
Each batch comes off the line subject to an analytical regime with gas chromatography, melting point verification, and moisture analysis. We track in-process parameters at every stage. This means no uncontrolled batch variation, fewer supply chain headaches, and less downtime for downstream processors. Our technicians contact users to resolve analytical queries and match production feedstock to your downstream process needs, supporting repeatable plant operations.
We own and operate drum-filling and bulk shipment lines, offering a range of packaging options for plant deliveries or international bulk shipment. Each drum is filled to order, sealed on our premises, and shipped under traceable documentation. For high-volume buyers, we load p-DCB in tank containers under strict supervision, following both weight checks and contamination controls. Careful scheduling of deliveries avoids stockout events and aligns with inventory management systems at end-user sites.
Our support engineers routinely assist procurement teams and line managers with application-specific queries. Industrial buyers receive detailed technical clarification, including compatibility with plant equipment, regulatory documentation, and integration into high-throughput production lines. Long-term customers use our in-plant troubleshooting capability to address processing issues or to validate alternative supply routes when market factors change. Our R&D and production managers review technical feedback as part of our process control cycle, enabling rapid adjustment to supply chain or process developments.
Direct manufacturing brings greater line-of-sight into product quality, batch traceability, and logistics reliability. Procurement teams prevent costly line disruptions by working closely with our logistics and technical teams. Manufacturers benefit from product consistency and on-time delivery, which simplify planning and budgeting for large-volume chemical synthesis. Distributors looking for supply assurance leverage our stable output rates and documented compliance. For technical buyers, having direct access to plant managers reduces the risk associated with specification changes or application-specific technical requirements.
| Key Value Area | Direct Manufacturing Advantage |
|---|---|
| Production Control | Full oversight from raw materials through packaging |
| Batch Consistency | Verified by in-house labs, reducing off-spec risks |
| Packaging Options | Range of drums, bags, and bulk container formats |
| Technical Support | Direct advice from engineering and quality teams |
| Supply Continuity | Managed by our own scheduling, not middlemen |
Our role as a direct producer enables stable production, technical insight, and responsive support for every industrial customer using p-DCB as an input in manufacturing, processing, or distribution chains.
Producing 1,4-dichlorobenzene, often known across industries as p-DCB, puts us at the point where quality and functionality meet on a daily basis. Our team focuses on the real work of large-scale synthesis, strict process control, and hands-on quality assurance, so our insights start from what comes off the actual line.
p-DCB leaves our plant as a white crystalline solid, with a characteristic strong aromatic odor. We track purity, melting point, and particle size closely. Our batches consistently melt near 53°C, matching the literature numbers. Solubility plays a central role in storage and downstream application. The compound dissolves in organic solvents (like ether, benzene) but resists water absorption. Volatility demands well-ventilated manufacturing and careful packaging for safe transit. Its density and low moisture content allow reliable automatic handling in bulk systems.
The largest volume of our production supports the manufacture of moth control products and air fresheners. This stems from the compound’s ability to sublimate at room temperature, creating vapor-phase protection against moth larvae in textiles and persistent odor control in public sanitation applications. In these sectors, granule size and purity matter for both dispersibility and shelf-life. Our physical processing line leverages continuous milling and grading to give downstream formulators predictable, dust-minimized material. Packaging targets retail and institutional users—small pellet sachets or bulk drums for automated dispensing systems.
Beyond deodorizer and pesticide work, we supply p-DCB as an intermediate to chemical processors running large aromatic hydrocarbon plants. Our customers use it to produce polyphenylene sulfide (PPS), a high-performance engineering plastic. Because residual impurities carry through to polymer properties, we operate under controlled batch protocols, keeping our by-products to industry-standard minimums. Our reactors are built to minimize cross-contamination and safeguard both product profile and worker safety. Technical teams handle on-site analytics—gas chromatography and IR spectroscopy—so customers can trace every lot back to its production run.
Some clients apply our product as a precursor for dyes, pharmaceuticals, or other chlorinated aromatic derivatives. Each of these segments requires fine-tuned quality features—ranging from specific isomer contents to finely sieve-cut particle grades. We work directly with process R&D teams at customer facilities. Customization requests are common, whether the end user wants batch-specific COAs, larger one-tonne bags for automated dosing, or low-dust grades for pharmaceutical synthesis.
Producing p-DCB calls for constant vigilance on environmental and occupational exposure. We meet every local discharge rule with on-site vapor recovery units and advanced scrubbers. Our process engineering staff review containment systems and monitor for fugitive emissions, knowing that both odor control and worker health ride on well-maintained equipment. Disposal and recycling of process residues follow established hazardous waste protocols—nothing gets left to chance.
After decades on the production floor, we put a premium on batch consistency, reliable logistic support, and open technical communication. Whether it ships out as fine pellets for consumer retail or as drum lots to custom polymerizers, every lot from our facility receives real-world testing aligned with the end-uses that define p-DCB’s industrial significance. For clients needing technical documentation or specific packing methods, our technical and packaging teams provide thorough support to ensure our product fits smoothly into diverse applications.
Bulk chemical purchasing draws its own set of questions and risks. Many customers know what end use they’re targeting, but not everyone has spent much time on the production floor or in the warehouse. At our facility, we produce 1,4-Dichlorobenzene (p-DCB) from raw materials all the way through to finished packaging. The choices we make about grades and pack sizes reflect real-world handling, transportation, and downstream processing—not just what reads well in a sales listing.
Our standard packaging for bulk 1,4-Dichlorobenzene comes in 25 kg bags, 50 kg drums, and 500 kg or 1000 kg intermediate bulk containers (IBCs). On the high-volume end, we load p-DCB into lined bulk trucks or ISO tanks for some users. The largest buyers are running high-throughput production lines and can't afford unnecessary repackaging stages or storage headaches. Smaller format packaging supports readiness at pilot plants or in applications that demand more frequent quality checks or tighter inventory control.
Packing density also matters. p-DCB is a crystalline solid at room temperature. If storage conditions fall too far below or above typical warehouse temperatures, condensation or caking issues can arise in larger containers. Over the years, we’ve optimized our bag and drum linings to combat this. In regions with high humidity, lined drums go out by default, and requests for vacuum-sealed or foil-lined sacks are common for keeping the chemical free-flowing and uncontaminated until use.
Our process delivers several purity grades to suit different industries. For most chemical synthesis operations, 99.8% minimum purity meets their process requirements. Odor control and deodorant block manufacturers often demand odor-free grade, which involves additional purification steps and very low impurity tolerances. We also offer technical grade, which carries a slightly broader impurity profile but costs less for downstream processes that tolerate a marginally wider specification.
Raw chemical parameters—like moisture, iron, or acidity—can drive or inhibit downstream reactions. Through several decades of investment in fractionation and filtration equipment, we keep contaminant levels below industry norms. Each batch that leaves our plant ships with a certificate of analysis from our onsite QC lab. If a customer requires more granular testing or a custom impurity spec, our technical team evaluates it directly, factoring in feasibility and scale-up needs.
Large industrial buyers often have their own decanting and transfer systems. For these operations, we supply p-DCB in bulk tankers or ISO containers, lined or coated to prevent cross-contamination. The loading and unloading infrastructure must match the product format—powdered or granular form affects flow properties and may demand different handling practices. Over time, we have worked directly with plant engineers to optimize delivery and connection protocols, ensuring easy transfer into fixed storage or filling lines with minimal losses.
Regulatory compliance can raise additional requirements. Regions with more stringent environmental or worker-safety rules sometimes require special secondary containment liners, tamper-evident seals, or specific labeling regimes. Our compliance staff audits these procedures and adapts our outputs, avoiding holdups at customs or destination sites.
Direct factory supply streamlines bulk purchasing for 1,4-Dichlorobenzene. As the manufacturer, we bear responsibility for specification, packaging, and documentation control from synthesis to shipment. Working directly with end users, we align every detail of supply with operational needs, cost pressures, and regulatory requirements—no intermediaries, only clear technical dialogue. For any engineered requests or special grades, our team responds quickly and draws on real, practical factory experience.
Our commitment as the producer of 1,4-dichlorobenzene is not limited to the production floor. We are responsible for guiding safe handling practices through every step—including storage, loading, and shipping. This material’s reactivity and volatility do not leave room for shortcuts or assumptions. Every process adjustment, new packaging innovation, and logistics improvement in our operation comes from real experience controlling risk and meeting regulatory demands.
In our own warehouses, we select storage locations with solid ventilation systems, keeping the air turnover high to control vapor build-up. 1,4-dichlorobenzene sublimates at room temperature, so limiting vapor concentrations cuts down on health risks for workers and cross-contamination with other materials. Our protocol keeps the product in tightly sealed, original packaging—usually high-density polyethylene drums or steel containers—away from direct sunlight or heat sources. We keep oxidizers, acids, and foodstuffs well separated. We train staff to spot minor leaks or product residue, maintaining a regular inspection schedule and documenting issues when they appear.
We ship full loads on dedicated vehicles to keep incompatible chemicals apart. Regulatory compliance is built into our logistics planning. Every shipment leaves our facility with clear transport documentation, including the proper UN number and hazard label required by ADR, IMDG, and DOT guidelines. Our fleet drivers are trained in hazardous goods protocols. In the event of delays or route deviations, our team stays in communication with the carrier to ensure temperature is controlled and containers aren’t mishandled. For export, we provide the necessary paperwork, including the Safety Data Sheet and Certificate of Analysis for each batch.
Every jurisdiction places tight requirements around 1,4-dichlorobenzene, and we integrate compliance early in our process. Our on-site HSE team references REACH, US EPA, and local environmental rules to ensure safe workplace exposure limits are respected and monitored. Forklift drivers and warehouse staff participate in regular chemical safety briefings and PPE checks. Containers, drums, and IBCs bear the correct GHS pictograms. Wastewater from cleaning or spills goes through approved processing systems, never discharged untreated. Our staff handles and records every incident, with corrective action and reporting to authorities if thresholds are exceeded.
We view regulations as the baseline, not the ceiling. Based on direct plant experience, we invest in thicker drum linings, tamper-evident seals, and temperature logging for longer shipments. We support our partners by keeping extra stocks of spill response kits and offer on-site operator training for customers taking bulk delivery. Our technical team tracks regulatory changes and industry best practices, updating protocols to stay ahead. For bulk clients, we can provide tailored packaging sizes or implement consignment stock management, so product moves quickly and does not sit in storage for extended periods.
The stakes with 1,4-dichlorobenzene run high. Mistakes in packaging, storage, or transport endanger staff and the environment, and even minor lapses can result in non-compliance or costly recalls. As the manufacturer, we control the process from the reactor outlet to the client’s plant gate. Our approach matches regulatory rigor, grounded in years of practical application and continuous improvement. We stand behind the safety, quality, and traceability of every shipment we produce.
For product inquiries, sample requests, quotations or after-sales support, please feel free to contact me directly via sales3@ascent-chem.com, +8615365186327 or WhatsApp: +8615365186327
