| Names | |
|---|---|
| Preferred IUPAC name | Dipotassium dichromate |
| Other names | Bichromate of potash Potassium bichromate Dichromic acid, dipotassium salt Dipottasium dichromate |
| Pronunciation | /pəˌtæsiəm daɪˈkrəʊmeɪt/ |
| Identifiers | |
| CAS Number | 7778-50-9 |
| Beilstein Reference | 1201300 |
| ChEBI | CHEBI:4868 |
| ChEMBL | CHEMBL1358 |
| ChemSpider | 6787 |
| DrugBank | DB11369 |
| ECHA InfoCard | 100.004.680 |
| EC Number | 231-906-6 |
| Gmelin Reference | Gmelin Reference: 1497 |
| KEGG | C17259 |
| MeSH | D011110 |
| PubChem CID | 24507 |
| RTECS number | UX8400000 |
| UNII | V6X3PO44TB |
| UN number | UN3288 |
| Properties | |
| Chemical formula | K2Cr2O7 |
| Molar mass | 294.18 g/mol |
| Appearance | Orange-red crystalline solid. |
| Odor | Odorless |
| Density | 2.676 g/cm³ |
| Solubility in water | 125 g/L (20 °C) |
| log P | -2.49 |
| Vapor pressure | Negligible |
| Basicity (pKb) | 11.92 |
| Magnetic susceptibility (χ) | Antiferromagnetic |
| Refractive index (nD) | 2.409 |
| Dipole moment | 0 D |
| Thermochemistry | |
| Std molar entropy (S⦵298) | S⦵298 = 282.6 J·mol⁻¹·K⁻¹ |
| Std enthalpy of formation (ΔfH⦵298) | –2377 kJ/mol |
| Std enthalpy of combustion (ΔcH⦵298) | -3928 kJ·mol⁻¹ |
| Pharmacology | |
| ATC code | V03AB16 |
| Hazards | |
| Main hazards | Oxidizing, toxic if swallowed, causes severe skin burns and eye damage, may cause cancer, may cause genetic defects, may cause respiratory irritation. |
| GHS labelling | GHS02, GHS05, GHS06, GHS08, GHS09 |
| Pictograms | GHS05,GHS06,GHS08 |
| Signal word | Danger |
| Hazard statements | H350, H340, H372, H314, H317, H334, H302, H400, H410 |
| Precautionary statements | P264, P270, P280, P301+P312, P302+P352, P304+P340, P308+P313, P312, P314, P321, P330, P362+P364, P501 |
| NFPA 704 (fire diamond) | 2-0-3-ox |
| Explosive limits | Non-explosive |
| Lethal dose or concentration | LD50 oral rat 190 mg/kg |
| LD50 (median dose) | 25 mg/kg (oral, rat) |
| NIOSH | 00-008-19 |
| PEL (Permissible) | PEL: 0.05 mg/m³ |
| REL (Recommended) | 0.05 mg/m³ (as Cr VI) |
| IDLH (Immediate danger) | 15 mg/m3 |
| Related compounds | |
| Related compounds | Potassium chromate Sodium dichromate Chromium trioxide |
| Item | Industrial Commentary |
|---|---|
| Product Name & IUPAC Name |
Potassium Dichromate IUPAC Name: Potassium dichromate |
| Chemical Formula | K2Cr2O7. This basic formula applies across industrial grades, but analysis of batch output always includes checks for variant ratios or trace impurities stemming from raw material variability and reactor performance. |
| Synonyms & Trade Names |
Synonyms: Potassium bichromate, Dipotassium dichromate Trade Names vary depending on grade and manufacturer’s naming. For high-purity or technical grades, the name is commonly differentiated for lab reagent, electroplating, or pigment application markets. |
| HS Code & Customs Classification |
HS Code: 2841.30 Customs classification aligns with the international nomenclature for inorganic chromates and dichromates. Accurate declaration demands attention to physical form and purity, as minor variations can affect duty classification in certain jurisdictions. |
In industrial settings, potassium dichromate production typically starts from sodium dichromate, converted through a double decomposition process using potassium chloride. Key control points include maintaining stoichiometry, managing temperature profiles, and controlling contaminant carryover. Chromate-to-dichromate conversion is sensitive to both pH and filtration regimes in the intermediate steps. Impurity management focuses on residual sulfate, sodium, and trace metal contents, which depend on the grade being targeted. High-purity requirements for laboratory or analytical use demand additional crystallization and purification steps, while technical grades for electroplating or corrosion inhibition applications tolerate slightly higher impurity levels provided performance parameters remain within controlled limits. The release specification for each batch is pegged to the grade, process, and regional requirements set by end-users.
Raw potassium chloride is selected for minimal insoluble residue and low heavy metal content to reduce final batch contamination risk. The process route selection—continuous vs. batch, multi-stage or single—depends on both plant scale and the purity profile required for the target customer base. Process deviations, such as inconsistent raw potassium chloride sources, show up in the trace sodium content and filtration performance, which QC monitors rigorously.
Batch-to-batch consistency is addressed by in-process sampling for chromate, dichromate ratios, particle size (if sold as a solid or granular form), moisture content for storage stability, and trace impurity levels. The final release standard always ties back to customer and internal criteria, reflecting key performance indicators such as solubility, color strength for pigment grades, or unwanted cation limits for electroplating processes. Adaptation to application-specific needs is routine, with additional purification or micronizing steps for applications sensitive to particle or soluble impurity profiles.
Potassium dichromate exhibits variable caking tendency depending on particle size, moisture pick-up during handling, and specific grade. Industrial storage demands humidity control and non-reactive containment to minimize degradation or contamination, especially for batches destined for high-specification end-uses. Downstream users often require clarity regarding prior lot handling and contamination risk, as trace organic or metallic impurities can disrupt sensitive applications such as photographic processing or catalyst manufacture.
Potassium dichromate typically forms as bright orange-red crystalline solids or fine powder, and the physical state can shift depending on drying conditions and particle size requirements for various industrial end uses. The odor is generally negligible; any detectable scent usually points to contamination or decomposition.
The melting point generally exceeds 390°C. Practical experience shows the substance does not exhibit a distinct boiling point under ambient pressure as decomposition occurs before boiling. Industrial handling often prioritizes controlling dust formation, which can exacerbate both user exposure and cross-contamination concerns in multipurpose facilities.
Bulk density changes with particle size and grade—granular material handles differently than fine powder, and flowability concerns will depend on downstream processing requirements such as slurrying, dosing, or blending.
In sealed containers and dry environments, potassium dichromate remains chemically robust. Moisture and reducing agents present special risk for uncontrolled reactivity, leading to potential release of hazardous chromium(VI) species or rapid reduction. Process water quality influences both solubility behavior and risk of byproduct formation. Thermal and UV stability are normally sufficient for standard processing, but long-term exposure to heat or light may accelerate conversion to lower-valence chromium compounds.
Water solubility is pronounced, but sensitive to solution temperature and pH. Cold process water slows dissolution; slightly warm water results in faster solubilization, commonly adopted for reagent preparations in labs and industry. Solubility in most organic solvents remains negligible, so water becomes the vehicle of choice for most applications. During solution prep, slow addition and agitation minimize dust exposure and exothermic splattering. The final solution concentration depends on end use, including leather tanning, metal finishing, and laboratory oxidations.
Quality and technical parameters of potassium dichromate depend on grade (industrial, analytical, reagent, or custom-specified). Parameters defined by customers drive production targets for purity and impurity profile. Acceptable impurity levels differ; for example, iron, chloride, and moisture vary especially between analytical and industrial grades.
| Property | Industrial Grade | Analytical Grade |
|---|---|---|
| Cr(VI) Content | Typical values set internally | Higher minimum set per customer/standard |
| Iron Content | Specified upper limit per batch | Stricter limit, process-controlled |
| Moisture | Batch-dependent, monitored during drying | Lower, typically verified by gravimetry |
| Insolubles | Monitored per application | Very low; stricter washing/filtration |
Impurity profile and limits originate from raw material selection, process conditions, and purification controls. For analytical uses, trace elements—especially transition metals and alkali impurities—face tighter restrictions.
Key quality metrics are determined by gravimetric, spectrophotometric, and titrimetric techniques. The final release standard is subject to internal quality control protocols, batch history, and customer-specific technical agreements. Process laboratories confirm batch data before release; external certification requirements are met through validated test methods as defined in regulatory documents where applicable.
Potassium dichromate production traditionally starts from chromite ore, with potassium carbonate or potassium hydroxide forming the alkali component. Supply chain scrutiny covers not only purity and trace elements in the ore and reagents, but also chemical form and physical sizing, affecting dissolution and reaction kinetics downstream.
Industrial routes include roasting chromite with potassium carbonate and lime in an oxidizing environment, converting the chromium to soluble chromate, then acidifying to precipitate key intermediates. Solution processing and crystallization isolate the final dichromate product. Process selection considers energy usage, waste byproduct management, and regulatory demands for chromium(VI) containment.
Key controls include temperature, oxygen partial pressure, and reactant feed profiles during roasting. Washing and filtration routines remove silica and iron-rich byproducts. Crystallization temperature and mother liquor composition determine product purity and physical form. Residual moisture content after drying must align with stability and ease of handling targets.
QC teams review each batch for consistency, cross-checking impurity outcomes against historical results. Moisture, particle size distribution, and crystalline phase are tracked. Recurrent in-process sampling during each stage supports real-time adjustment, reducing off-grade material. Release criteria integrate customer feedback and long-term product performance correlations, rather than fixed theoretical values.
Potassium dichromate functions as a strong oxidizer in both acidic and neutral aqueous media. Applications span organic syntheses, metal surface cleaning and passivation, and wastewater treatment. In reduction settings, it liberates elemental chromium or Cr(III) salts; thorough control of reaction conditions prevents formation of environmentally problematic intermediates.
Heating facilitates reaction kinetics, but temperature needs adjustment according to substrate sensitivity—organic synthesis sets different heat limits than metal finishing. Addition of sulfuric or other mineral acids adjusts pH to optimum levels. Solvent selection rarely deviates from water, though mixed media can be employed in specialized processes. Catalysts generally remain unnecessary for standard oxidation use, but the presence of transition metal impurities can impact reaction rates.
Reduction or modification leads to chromium(III) oxide, chromic sulfate, or specialty chrome pigments. By adjusting the reaction medium and downstream unit operations, outputs can be fine-tuned for ceramics, pigment, or plating industries. Wastewater treatment may generate chromic hydroxide sludges, which require stabilization prior to disposal.
Potassium dichromate requires cool, dry, and shaded storage to preserve stability and minimize reduction or clumping. Unprotected storage in high humidity or in the presence of organic vapors increases risk of degradation and agglomeration. Well-ventilated, segregated areas reduce contamination risks with combustible or reducing agents.
High-density polyethylene, glass, or chemical-resistant metal drums with tight closures serve best for both bulk and small-scale storage. Mild steel and aluminum are incompatible due to risk of reaction and product breakdown.
Shelf life can extend over years if stored as specified. Signs of degradation include visible color changes, damp clumping, or reduction to green chromium(III) species; any such batch should undergo requalification before use in critical applications.
Potassium dichromate is classified as a carcinogen, mutagen, and respiratory sensitizer according to the Globally Harmonized System for labeling and hazard management. The GHS pictograms relevant to this substance include Health Hazard, Acute Toxicity, and Environmental Hazard.
Technical staff and operators must recognize the acute and chronic risks arising from inhalation, skin, or eye exposure. Strict PPE and workplace ventilation requirements accompany any open handling steps. Worker health monitoring programs are often established in plants manufacturing or processing large quantities. Specific hazard phrases relate to both acute toxicity (irritation, burns, allergic reactions) and long-term effects (carcinogenicity, reproductive toxicity).
Chromium(VI) compounds in general, including potassium dichromate, show recognized toxicity at low exposure levels; thresholds typically defined by regional occupational health standards. As a manufacturer, we implement engineering controls, closed system material transfers, and rigorous personnel training to minimize exposure. Spillage or accidental release triggers immediate cleanup with specialized procedures to render the area safe. Any process changes or new applications undergo risk review in cooperation with safety and compliance teams to meet or exceed regulatory standards.
Consistent output of potassium dichromate depends on the upstream chromium ore procurement, sodium carbonate sourcing, and class of refining technology. Production cycles align with maintenance intervals and the batch size of roasting and leaching lines. In practical manufacturing, capacity is directly affected by the local supply of ore, reagents, and the demand fluctuations from glass, pigment, and metal finishing industries. Grade-specific requirements for purity drive the segmentation of available capacity—technical, reagent, or high-purity grades require separate processing and tankage to avoid cross-contamination. Short-term availability is governed by batch planning, campaign length, and ongoing regulatory inspections, with capacity allocation shifting based on confirmed contracts and spot tenders.
Lead times vary by batch campaign scheduling, pending raw material supply, and grade-centric quality release. For routine technical grades, practical minimum order quantities reflect packaging and logistics efficiency rather than uniform figures. Lead time for non-standard purities or specialized granulations often extends due to intensified in-process testing, with additional waiting linked to final regulatory paperwork or shipment corridor congestion.
Selection of packaging hinges on end-user requirements, toxicity handling mandates, and logistical throughput. Bulk shipments adopt lined steel drums or jumbo bags rated for material compatibility and regulatory transport codes. Smaller lots may demand fiber drums or composite IBCs to meet laboratory or specialty market demands. Reinforced palletization and secondary containment reduce the risk of cross-contact with other cargo types and address stringent labeling as enforced by key import markets.
Export routing aligns with local hazardous goods protocols. Packaging compatibility with sea and inland containerization dictates shipment aggregations. Payment terms in principal contracts often depend on customer profile and historic trade, with stricter advance payment or L/C conditions for new business or higher compliance markets. Overland shipment to regional customers adheres to national transit approvals and designated secure transport partners.
The price backbone for potassium dichromate rests on chromium ore pricing, sodium carbonate volatility, and utilities consumption. Ore grades, extraction costs, and mining royalties create cost pressure at the very first step. Global ore market shifts, labor disputes, or state-level export curbs can induce supply stress. Sodium carbonate sourcing—sensitive to energy pricing and feedstock availability—adds further volatility. Fuel, regulatory emission compliance, and facility utility management constitute nontrivial operational expenses and can escalate rapidly with policy changes or seasonal supply shifts.
Product price differentials arise technically from grade specifications and certified impurity controls. Higher-purity potassium dichromate, destined for electronics, laboratory, or food-contact catalyst applications, undergoes multi-step refinement, incurring yield loss and waste disposal cost that must be factored into price. Certification for critical use (such as REACH compliance, ISO packaging, and UN hazardous material marking) elevates unit price by integrating external audit, documentation, and packaging changeovers. Less refined technical grades, often bulk shipped, maintain a lower price point tied strictly to raw material and energy input, without the cost load of enhanced purification.
Potassium dichromate demand follows glassmaking, metal finishing, pigment, and laboratory use cycles. Upstream regulatory action or environmental accidents in chromium-mining regions tend to drive abrupt changes in global feedstock pricing. Regulatory tightening on hexavalent chromium use in consumer or environmental applications in developed economies gradually restricts discretionary demand in the EU, US, and Japan. Meanwhile, consumption patterns in India and China exhibit less price sensitivity on the back of domestic manufacturing incentives and fewer outright bans in certain application niches.
Forward pricing signals point to increased baseline pricing for potassium dichromate. Cost inflation stems from stricter mining limits, environmental compliance spending, and more expensive waste treatment requirements for hexavalent chromium streams. Certification and packaging expenses will continue to climb, affecting delivered cost in tightly regulated markets. Downward price pressure remains unlikely in the absence of significant shifts in base mineral supply or process innovation.
Market readings derive from public procurement data, periodic price assessments issued by recognized chemical industry agencies, direct customer tender outcomes, and regulatory filing review. Manufacturer price projections incorporate feedstock contract analysis, process utility cost tracking, and strategic engagement with downstream industry players.
Recent years have brought more rigorous oversight to hexavalent chromium compounds across nearly all major economies. Accident-driven environmental concerns in source mining regions resulted in new inspection regimes, temporarily limiting raw ore output and impacting derivative pricing along the supply chain.
EU and US regulatory bodies issued additional guidance on worker exposure monitoring and permissible limits in end-product applications. Updated packaging and transport requirements now reflect latest hazardous materials handling standards, with increased frequency of external audits for certified producers. Indian regulatory outreach has focused on wastewater and residue management, with greater scrutiny of affiliated supply chains for RoHS-critical end use.
Manufacturers responded by implementing enhanced in-process impurity segregation, mandatory batch traceability for high-purity lots, and real-time utility usage logging to anticipate process bottleneck or pollution spikes. Supply chain strategies shifted to multi-sourcing and more rigorous inspection of raw material lots prior to production intake. Technical documentation for transport, labeling, and certification now receives priority integration into export batch release to meet updated compliance timetables and minimize customs complications.
Potassium dichromate serves several sectors where strict control over product purity, particle size, and trace impurities defines suitability. The chemical’s oxidizing strength and consistency influence its role in various industrial applications:
| Industry | Recommended Grade | Key Selection Criteria |
|---|---|---|
| Analytical Chemistry | Analytical Reagent Grade | High purity, trace metals controlled, batch documentation |
| Metal Surface Treatment | Technical / Industrial Grade | Impurity tolerance varies; sulfate and chloride monitored according to equipment and final use |
| Pigment Manufacturing | Industrial Grade | Low organic and insoluble matter, particle consistency |
| Leather Tanning | Industrial Grade | Chromium(VI) stability, acceptable impurity range per tanning process |
| Laboratory Reagents | Analytical Reagent Grade | Lot traceability, minimal batch variation, low trace contaminants |
| Textile Dyeing | Technical / Industrial Grade | Iron and heavy metal content below textile process tolerances |
Start with a complete process description. Detail downstream use, regulatory oversight, and exposure risks. Many sectors, including analytical labs and regulated manufacturing, prescribe minimum grade standards before qualification.
Regulatory limits for trace impurities, hexavalent chromium stability, and worker exposure may drive grade choice. Require reference to region-specific regulations or industry codes that set chemical content thresholds and quality documentation needs.
Specify acceptable ranges for major and minor impurities based on end-use. Analytical applications, specialty surface coatings, and pigment synthesis may request additional elemental scans. If target levels aren’t standard, discuss with the production or QA team for customized batches.
Larger batch purchases for high-throughput industrial lines often balance price with impurity tolerance, while R&D and laboratory work justify higher grades for traceability and documentation. Factor inventory turnover and risk of batch variability into procurement.
Validation samples enable lab or pilot testing against internal or external benchmarks. Quality control teams can supply batch analysis certificates for delivered samples. Review sample data for consistency with stated process requirements before committing to scale-up.
Production of potassium dichromate runs under a formalized quality management system. Management practices are regularly audited for compliance with recognized industry standards. Audit focus includes raw material traceability, in-process monitoring, environmental controls, and chain of custody. Maintaining these certifications supports both internal process control and external regulatory alignment.
Product certifications are defined by grade and application. Industrial potassium dichromate may be covered under national chemical registration systems or sector-specific registrations where applicable. The scope and renewal of such certifications are matched to batch release records and customer specifications. Detailed compliance data is maintained for each production batch according to local and export requirements. The product’s certification footprint can change according to grade, end-use, and jurisdiction requirements.
Each production batch ships with a comprehensive certificate of analysis referencing routine and application-specific quality checks. Test items depend on product grade and customer contract. Additional support documents such as production traceability, impurity profiles, stability declarations, or REACH compliance statements are available upon request. Documentation retention and reporting review cycles ensure consistency and traceability for all supplies.
Operational production lines are dedicated to potassium dichromate with core capacity planned for continuity. Expansion and maintenance schedules are set to avoid unplanned interruptions. Strategic feedstock sourcing supports forward commitments for volume and timing. Business cooperation can be structured for both long-term offtake and spot requirements, shaped by actual forecast and call-off patterns from downstream processors. Flexible framework agreements or rolling delivery schedules can be discussed to match customer procurement cycles.
Core supply capability results from control over raw material procurement, established synthesis routes, and in-house purification. Batch tracking monitors deviation at each stage; corrective adjustments are made in real time. Finished product output matches contracted specifications for technical, industrial, or special grades. Where customer forecasts signal variation, buffer stocks or dynamic allocation are deployed to smooth order fulfillment and reduce the risk of production gaps.
Sample dispatch can be arranged following confirmation of application scenario, grade requirements, and regulatory needs. Information on downstream processing intentions informs which batch characteristics are most relevant for sampling. Technical support includes pre-shipment documentation and follow-up on lab-scale or pilot-scale evaluation feedback. For regulated applications, additional paperwork may be included with the sample package.
Business models include consignment, fixed-volume contracts, or volume-flexible supply with agreed minimums and maximums depending on buyer preference and demand variability. Adjustment of delivery frequency, lot size, and ongoing technical support depends on customer process requirements and storage capacity onsite. For multi-shipment or multi-site consumption, centralized or distributed supply chains can be managed. Change management for supply plans follows structured communication and real-time production updates to avoid interruptions in downstream operations.
Production facilities focus on enhancing yield and purity by optimizing reaction controls, filtration efficiency, and downstream crystallization stages. The industry devotes significant laboratory hours to process intensification, with attention to fluid-handling strategies and mother liquor recycling. Manufacturing development teams analyze ore-sourced chrome consistency, which can lead to impurity variability. Processing such ore into potassium dichromate requires constant process recalibration, as run-of-mine raw material shifts by geographic source.
End-users in pigment, plating, wood preservation, and chemical synthesis push for customizable particle size and impurity profiles, with R&D often calibrating output to suit downstream reactivity profiles—especially for oxidative syntheses and specialty glass coloration.
Ongoing projects explore catalytic and corrosion-inhibition functions for electronics, aerospace coatings, and niche organic syntheses, where precise redox behavior drives performance. As regulations shift, demand emerges for lower-trace impurity inputs into pharmaceuticals and sensitive-process dye intermediates. In several regions, environmental monitoring groups are testing potassium dichromate as a benchmark oxidant for chemical oxygen demand (COD) analysis, fueling demand for analytic-reagent and ultra-high-purity grades.
Production teams address batch-to-batch consistency concerns tied to source ore variability, which influences the impurity spectrum—especially in grades destined for high-sensitivity electronics or lab reagents. Precipitation management, controlled cooling, and multi-stage filtration remain critical to reducing silica, sulfate, and trace metal carryover. Teams frequently revisit process flows to minimize secondary waste streams and control hexavalent chromium losses, not only for regulatory compliance but also to optimize raw material efficiency.
Recent advances in process analytics—like in-line spectrophotometry and automated pH/redox monitoring—shorten troubleshooting cycles and boost first-pass acceptance rates, but adaptation to older production infrastructure remains gradual. Breakthroughs focus on impurity mapping and digital monitoring for real-time batch adjustments, aiming to align closely with client-specific technical specs.
Global demand signals track regional regulations, with applications in environmental testing, inorganic pigment manufacturing, and specialty synthesis expected to influence production volumes in the near term. Ongoing regulatory scrutiny in the EU and North America leads to gradual demand shifts favoring tightly specified, low-residue grades, while general industrial segments in developing regions sustain baseline volume.
Forward projections by technical planning teams suggest that capacity expansions will proceed conservatively, with investment heavily weighted toward process control and downstream purification units, rather than raw capacity increases. The application mix may shift incrementally towards refined analytical chemistry and electronics end-uses.
Technical roadmaps chart a shift from conventional batch processing toward semi-continuous and closed-loop operations. Process chemists evaluate alternate oxidant feedstocks and effluent treatments to minimize toxic byproducts at source. Green chemistry principles shape R&D budgets, although transition timescales are bounded by cost, legacy asset compatibility, and end-user qualification protocols. Purification strategies are trending toward multi-stage crystallization and microfiltration, targeting lower cross-contamination in mixed-use facilities.
Sustainability initiatives center on hexavalent chromium containment, waste minimization, and recovery protocols for both process water and scrap residue. Technical teams trial new effluent scrubbing reagents and secondary product valorization (chromium recovery from waste streams), reporting practical gains in environmental liability reduction. In select regions, life-cycle assessments highlight the need for greenhouse gas reduction along the production chain, further prompting investment in process electrification and on-site renewable integration where feasible. Internal gate reviews target sustainable returns without undermining batch consistency for regulated grades.
Application engineers serve as the primary interface for detailed technical queries, providing clarifications on grade selection, impurity expectations, formulation compatibility, and process adaptation. Customers in regulated industries (such as electronics or environmental analytics) receive guidance based on documented historical batch data and application experience, with the option to request technical audits for process implementation or troubleshooting.
Support staff maintain dialogue with major clients on process optimization issues such as dosing accuracy, product dissolution, unwanted byproduct formation, and management of residual sludge in surface treatment or catalysis operations. For new or high-value customer projects, technical teams coordinate with quality control and R&D to co-develop trial batches tailored to specification needs, enabling smoother technology transfer and post-supply validation.
Feedback from customer process engineers often leads to incremental refinements in particle sizing, dryness, or flowability, with production batches tested for these properties during standard internal qualification cycles.
The production and QA teams uphold systematic root cause analysis for any reported non-conformances, utilizing retained samples and in-house analytical records. Technical service logs are reviewed for recurrent issues linked to batches, and improvement actions are documented as part of ISO and internal process audit trails. Replacement, credit, or batch adjustment decisions depend on mutually agreed non-conformance criteria, guided by the scope of the customer’s technical documentation and process requirements. All technical documents, including certificates of analysis and regulatory declarations, are provided in compliance with client and authority requests, with technical liaisons available for follow-up or formal supplier audits as needed.
Our plant operates a fully integrated production line dedicated to potassium dichromate. We manage every core step in the process, starting from ore calcination through refining and crystal separation. This structure gives us oversight of purity and particle characteristics. Rigorous process supervision eliminates sources of contamination and maintains product parameters batch to batch. We do not outsource synthesis. Every shipment leaves directly from our facility, reflecting the standards we set internally, not those of a remote third party.
Potassium dichromate remains indispensable across a range of heavy industries. The metal finishing sector uses it for passivation and corrosion resistance in steel production. Its oxidative strength supports chromium plating, etching, and glass coloring on an industrial scale. Pigment manufacturers draw on it for stable orange-red chromium compounds. The diagnostics and laboratory sectors value its performance as an analytical oxidant. Our production schedule prioritizes consistent availability for manufacturers whose processes rely on this critical inorganic compound.
Every batch of potassium dichromate we produce undergoes full internal testing. Onsite laboratories carry out wet chemical analysis and instrumental confirmation of chromate content and impurity levels. Workforce training focuses on procedure compliance and continuous improvement. Each lot is fully traceable. We deliver certificates showing test results for critical parameters. Buyers in regulated sectors—especially glass, pigments, and electroplating—select us for these practices.
As direct producers, we control filling and packaging from start to finish. We offer containerized packing lines including drum, bag, and bulk tote arrangements. We seal and palletize shipments in-house, maintaining integrity against moisture ingress and mechanical shocks during transit. Large-scale users rely on our logistics team for volume-based supply planning, handled directly by our operations management group. Our warehouse stocks finished product for scheduled shipment, eliminating lead times. The packing configuration matches end-use requirements, supporting both automated plant dosing and manual loading operations.
Our technical support team operates from inside the plant, not a remote office. We work closely with production engineers at manufacturer and distributor sites. This team can review process integration questions, address scale-up needs, and resolve on-the-ground technical concerns. Long-term partnerships benefit from established channels for technical exchange and feedback, keeping our production aligned with shifting industry standards and downstream process changes.
We serve manufacturers, independent distributors, and global procurement teams seeking a reliable potassium dichromate source. Direct sales from our factory reduce dependence on intermediaries, keeping costs predictable and minimizing risk from hidden handling or storage issues. Production schedules align with industrial volumes and blanket orders. Our certification and full-lot traceability streamline audits and compliance checks. Every customer draws business value from our straightforward model—clear communication, accountable delivery, and tight control of every link in the supply chain. We maintain focus on what matters to professional buyers: product integrity, traceable documentation, and frictionless fulfillment, all overseen by the factory that produces the material itself.
Years of operating chemical synthesis lines for potassium dichromate have given us a clear sense of what serious buyers expect and what production challenges really matter. This is a strong oxidizing agent, bright orange-red in solid form, and its chemical formula is K2Cr2O7. Handling and maintaining quality require tight process control and constant monitoring of contaminant levels.
We produce potassium dichromate to fulfill its role where robust oxidizing conditions are essential. In chemical synthesis, electroplating, and laboratory applications, its reactivity with reducing agents is well documented. Solubility in water remains high, which supports efficient dissolution and even dispersal in industrial processes. Moisture content in the final product is tightly monitored since excess water can degrade storage stability and alter dosage accuracy for end users.
From a manufacturing standpoint, we maintain clarity on what defines premium grade potassium dichromate. Chromium(VI) content forms the core value of the product, so typical analysis in our batches confirms the minimum assays expected in the market for technical and analytical uses. Potassium content tracks closely with the chromate yield, supported by gravimetric and titrimetric analysis in our labs.
Contaminant control cannot be overlooked. Sodium, iron, calcium, and heavy metals like lead remain in focus. Our filtration and crystallization steps target lower impurity thresholds than commodity-grade material. Each production run goes through a cycle of solution clarification and solid-state purity checks before packaging. All test records get archived for batch traceability, which many clients in regulated industries examine before purchase.
The color and crystalline form act as a first clue to product uniformity. Deep, sharply defined orange crystals suggest the right process chemistry and good storage practices. Non-hygroscopic nature further supports shelf life, so our containers stay well-sealed and moisture-protected from loading to final delivery.
Our standard packaging uses robust liner bags within rigid drums to protect the chemical from accidental exposure and minimize dust generation. Each unit gets batch identification, manufacture date, and hazard labeling per regulatory requirements. Transportation laws surrounding chromates guide our labeling and documentation practices at every step of the logistics chain.
Quality control reports and certificates accompany all shipments. Data covers assay, moisture, insoluble matter, and key impurity levels the same way a regulated sector would require for compliance audits. On request, our technical team can provide detailed test results down to trace elements and soluble contaminant tests.
Handling potassium dichromate brings up serious health and environmental concerns. Our plant invests in sealed, low-emission reactors and dust collection to limit airborne chromium exposure inside the facility. Stringent wastewater controls ensure spent solutions or cleaning residues never leave the site untreated. We train our workforce on personal protective protocols and update our environmental monitoring regularly to match or outpace new legislation.
We see rising requests for transparency on sourcing and waste management. Clients from Europe and North America regularly review our compliance programs before onboarding. Our response is full process transparency, with third-party audit readiness and responsible return programs for unused or spent material.
Meeting technical standards for potassium dichromate means more than just blending and packing. High-performance applications demand clarity on every parameter, from chromium assay to heavy metal backgrounds. Our commitment: providing data, technical support, and open process documentation to customers worldwide who depend on chemically consistent, regulation-compliant potassium dichromate.
Potassium dichromate stands as a foundational material in many sectors, from chemical synthesis and surface finishing to laboratory analysis. As a direct manufacturer, we understand the concerns raised by recent reports about sourcing stability and shipping lead times. Bulk procurement is not only possible, but also central to how our manufacturing schedules are structured. Customers from various industries—including leather tanning, electroplating, and pigment manufacturing—rely on timely, large-scale deliveries to maintain uninterrupted operations.
Our production system is designed around predictable volume requirements. Bulk quantities, whether requested in drums, supersacks, or ISO containers, leave our facilities regularly. The scale of our operations allows us to maintain a steady inventory buffer, covering both scheduled and urgent orders for industrial clients. This approach does not rely on spot market surpluses, nor does it push longer wait times onto customers facing tight project timelines. The demand for potassium dichromate fluctuates across quarters, but we have made it a point to build production flexibility into our shifts and raw material sourcing. Advance planning and periodic forecasting, worked out directly with high-volume users, help stabilize our capacity planning and delivery windows.
Procurement lead times are shaped by several real-world factors that our customers may not always see. The main ones stem from raw material availability, refinery throughput, and seasonal logistics bottlenecks. For standard orders, it is typical for us to confirm shipment readiness within 7-21 days from firm order, especially for clients with established credit and annual contract volumes. Consistent communication and up-to-date forecasts from our buyers allow us to expedite production allocation and streamline export documentation.
For larger or specialized bulk orders—such as those requiring specific packaging formats or purity profiles—additional lead time might be guided by availability of custom materials or specialty handling. Our technical team works closely with clients at these volumes to ensure the operational schedule aligns with the client’s on-site storage and usage plans. We also keep an eye on environmental regulations affecting chromium compounds; compliance documentation, labeling, and transport permits occasionally add short additional steps before release to carrier partners.
We strongly encourage regular communication and rolling forecasts to secure preferred shipping windows in an increasingly competitive global market. Labs requiring steady potassium dichromate for analytical work, for example, often benefit from fixed annual contracts to reduce volatility. Manufacturers scaling up batch production or seasonal finishing benefit from advance logistical coordination, including pre-booked transport and customs clearance through integrated supply chains.
All deliveries leave our site accompanied by full certificates of analysis and adhere to the latest handling and safety protocols. Actual stocks and timing are transparently discussed with each client. Our emphasis always lies on proactive planning and direct, open lines between our factory representatives and client procurement teams. The focus remains on long-term reliability, cost control, and mutual understanding between manufacturer and end user.
Potassium dichromate draws attention from regulatory bodies due to its pronounced oxidizing character and toxicological profile. As a manufacturer, every ton dispatched from our facility has to align with strict international and domestic regulations. Our team holds direct experience with real-world logistics—there is no shortcut or workaround when it comes to the letter of the law and the seriousness of safety.
Shipping potassium dichromate requires complete adherence to the Hazardous Materials Regulations (HMR), as well as alignment with IMDG for sea freight and IATA for air. On the ground, transportation falls under DOT guidelines. Products classified as UN 3086 – Toxic, Oxidizing, Inorganic Solids–must travel in UN-certified packaging. We supply our product in heavy-duty, high-density polyethylene drums lined for chemical resistance, sealed tightly against both leaks and contaminants. Every container comes labeled per GHS requirements, with all pictograms and hazard statements present, so there is no confusion at any stage.
Our logistics unit trains with regular refreshers. Our drivers hold valid hazmat endorsements. Fleet maintenance schedules get documented, since any failures in loading, unloading, or on the road could have severe consequences.
Potassium dichromate’s oxidizing power mandates careful storage. Our warehouse stores product in its dedicated, ventilated segregated area, away from acids, organics, reducing agents, and flammable materials. We always keep the floor dry—spills mix with organic debris to create fire risk. We fit spill berms at entry points, maintain visible emergency eyewash stations, and provide chemical suits and gloves for our staff. Routine spill drills ensure no one improvises in the event of an incident.
Direct sunlight and fluctuating temperatures promote degradation and caking, so our stock sits in climate-controlled storage. Humidity control matters for safety and for preserving free-flowing characteristics. Every container in our storage area sits above ground level, never stacked in ways that risk puncture or tipping.
Regulators may call for records at any time. Our in-house compliance specialists maintain detailed logs of movement, storage time, and training intervals. These records validate our process during audits and reassure end users that every step matches current legal frameworks.
Rules cannot replace a safety mindset. We invest in hands-on training—our team reviews every new regulatory update as soon as it’s issued. We invite third-party trainers to challenge and sharpen our protocols.
Laws change, and chemical classification sometimes gets revised as toxicological research improves. We monitor these shifts, updating our policies and packaging to maintain legal compliance without disruption to our clients’ timelines. Our technical team stands ready to consult on storage upgrades or new handling requirements for partners scaling up.
Every shipment originates from our site, fully documented, tightly sealed, compliant with every relevant regulation. We maintain our own inspection and testing routines rather than relying on external parties. These investments in compliance help us keep workplace injuries at zero and minimize environmental risks. Customers trust our experience to deliver a hazardous chemical safely, every time.
For product inquiries, sample requests, quotations or after-sales support, please feel free to contact me directly via sales7@bouling-chem.com, +8615371019725 or WhatsApp: +8615371019725
