4-Bromobenzo[a]anthracene: Bulk Supply & Technical Data
Technical Specifications and Purity Grades of 4-Bromobenzo[a]anthracene (CAS 61921-39-9)
4-Bromobenzo[a]anthracene, also referred to as 4-bromotetraphene or 4-Brom-benzanthracen, is a critical polycyclic aromatic hydrocarbon (PAH) intermediate with the CAS number 61921-39-9. This benzo[a]anthracene derivative is primarily utilized in advanced organic synthesis, particularly as a precursor for organic semiconductor materials. At NINGBO INNO PHARMCHEM CO.,LTD., we supply this compound in industrial quantities with a focus on consistent quality and reliable logistics.
Our standard offering includes two purity grades tailored to different application requirements. The table below summarizes the key technical parameters for each grade. Please note that these are typical values; actual batch-specific data is provided in the Certificate of Analysis (COA).
| Parameter | Technical Grade | High-Purity Grade |
|---|---|---|
| Assay (HPLC) | ≥ 98.0% | ≥ 99.5% |
| Appearance | Off-white to pale yellow powder | White to off-white crystalline powder |
| Melting Point | Please refer to the batch-specific COA | Please refer to the batch-specific COA |
| Loss on Drying | ≤ 0.5% | ≤ 0.1% |
| Single Impurity (HPLC) | ≤ 1.0% | ≤ 0.1% |
| Total Impurities | ≤ 2.0% | ≤ 0.5% |
For applications demanding ultra-high purity, such as organic semiconductor precursor synthesis, we recommend the high-purity grade. This grade minimizes trace metal content and organic volatiles, which can critically affect device performance. Our manufacturing process is optimized to reduce isomeric byproducts common in PAH bromination, ensuring a reliable supply of this high stability intermediate.
Certificate of Analysis (COA) Parameters: Assay, Impurity Profiles, and Non-Standard Behavior
Every shipment of 4-Bromobenzo[a]anthracene is accompanied by a comprehensive COA detailing batch-specific results. Beyond the standard assay and impurity profile, our COA includes data on residual solvents, heavy metals, and, upon request, particle size distribution. A critical non-standard parameter we monitor is the presence of trace dibromo derivatives, which can form during the synthesis route. Even at levels below 0.05%, these impurities can influence the optical properties of downstream OLED materials. Our in-house quality control uses HPLC-MS to quantify these species, providing transparency that supports your custom synthesis needs.
Another field-observed behavior is the compound's sensitivity to light and air over prolonged storage. While the bulk powder is stable under recommended conditions, we have noted a gradual color shift from off-white to light beige in technical-grade material exposed to ambient light for several months. This does not correlate with a significant drop in assay but can be a concern for color-sensitive applications. Our packaging protocols mitigate this through the use of amber glass or light-protective aluminum foil bags.
Industrial-Scale Handling: Bulk Packaging, Storage Conditions, and Supply Chain Reliability
We understand that logistics and handling are as crucial as chemical purity. Our standard packaging for 4-Bromobenzo[a]anthracene includes 25 kg fiber drums with inner aluminum foil bags, 10 kg vacuum-sealed bags, and smaller aliquots for R&D. For bulk orders, we offer 210L steel drums with secure sealing. All packaging is designed to maintain integrity during international transit. Storage recommendations are straightforward: keep in a cool, dry, and well-ventilated area, away from direct sunlight and incompatible materials. The recommended storage temperature is 2-8°C for long-term stability, though short-term shipments at ambient temperature are acceptable.
Our supply chain is built on a dual-manufacturing model, with production facilities in China and strategic warehousing in key markets. This allows us to offer competitive bulk prices and flexible delivery terms, including FOB, CIF, and DDP. As a global manufacturer, we maintain safety stock for this PAH intermediate, ensuring lead times as short as 2-3 weeks for regular orders. For urgent requirements, we can expedite shipments from our regional hubs.
Comparative Performance as a Drop-in Replacement: Cost Efficiency and Technical Equivalence
For procurement managers evaluating alternative sources, our 4-Bromobenzo[a]anthracene serves as a seamless drop-in replacement for existing supply chains. The compound exhibits identical reactivity in key transformations, such as Suzuki coupling or Buchwald-Hartwig amination, which are common in the synthesis of organic semiconductor precursor molecules. In head-to-head comparisons, our high-purity grade matches or exceeds the performance of material from other established suppliers, as confirmed by independent third-party testing.
The primary advantage lies in cost efficiency without compromising technical equivalence. By optimizing our synthesis route and leveraging economies of scale, we can offer a more competitive bulk price while maintaining rigorous quality standards. This is particularly beneficial for scaling up from pilot to commercial production. Our technical support team can provide comparative COA data and assist with process transfer to ensure a smooth transition.
Field Insights: Managing Viscosity Shifts and Crystallization in Sub-Zero Environments
While 4-Bromobenzo[a]anthracene is a solid at room temperature, its behavior in solution or during processing can present challenges in cold environments. A non-standard parameter we have extensively characterized is the viscosity shift of concentrated solutions (e.g., in toluene or THF) at sub-zero temperatures. Below -10°C, some solutions exhibit a marked increase in viscosity, which can affect pumping and mixing in continuous flow reactors. This is not a flaw but a physical property that must be accounted for in process design. Our technical bulletin provides viscosity-temperature curves for common solvents, enabling engineers to adjust solvent ratios or heating accordingly.
Another practical insight relates to crystallization handling. When recrystallizing the compound from hot toluene, rapid cooling can lead to a fine, voluminous powder that is difficult to filter. Controlled cooling at a rate of 5-10°C per hour yields larger, more easily handled crystals. This hands-on knowledge, gained from years of manufacturing process optimization, can save significant time during scale-up. For further details on solubility profiles, refer to our dedicated articles on 4-Bromobenzo[A]Anthracene Solubility Profiles For Solution-Processed Oled Host Matrices and 4-Bromobenzo[A]Antraceno - Solubilidade Para Matrizes De Oled.
Frequently Asked Questions
What is the minimum order quantity (MOQ) for 4-Bromobenzo[a]anthracene?
Our standard MOQ is 1 kg for both technical and high-purity grades. For initial trials, we can accommodate smaller sample requests. Contact our sales team for current bulk pricing and availability.
Can you provide custom synthesis or derivatives of this compound?
Yes, we offer custom synthesis services for related benzo[a]anthracene derivatives and other PAH intermediates. Our R&D team can work with you to develop specific brominated or functionalized compounds under confidentiality agreements.
What is the typical lead time for bulk orders?
For orders up to 100 kg, lead time is typically 2-3 weeks from order confirmation. Larger quantities may require 4-6 weeks, depending on current production schedules. We maintain safety stock to accommodate urgent requests.
How do you ensure batch-to-batch consistency?
We employ a rigorous quality management system, with in-process controls at each synthetic step. Final product is tested against a certified reference standard, and a COA is issued for every batch. We also retain samples for 24 months for retrospective analysis.
Is technical support available for process optimization?
Absolutely. Our team includes experienced chemists who can provide guidance on handling, storage, and reaction conditions. We can share non-confidential data on solubility, stability, and compatibility to support your development work.
Sourcing and Technical Support
As a dedicated manufacturer of specialty PAH intermediates, NINGBO INNO PHARMCHEM CO.,LTD. is committed to providing high-quality 4-Bromobenzo[a]anthracene with the technical backing you need. Whether you are scaling up an OLED host material or exploring new organic semiconductor precursor pathways, our product offers the purity, stability, and supply security essential for commercial success. For detailed specifications, batch samples, or to discuss your specific requirements, we invite you to explore our product page: high-purity 4-Bromobenzo[a]anthracene for OLED intermediates. Partner with a verified manufacturer. Connect with our procurement specialists to lock in your supply agreements.