2-Bromophenylboronic acid, also called (2-bromophenyl)boronic acid, is an aromatic boronic acid used primarily as a bifunctional building block in organic synthesis. Its key identity data are CAS Number 244205-40-1, molecular formula C6H6BBrO2, and molecular weight approximately 200.83 g/mol. The molecule combines a boronic acid group for cross-coupling chemistry with an ortho-bromo substituent that can support further functionalization, making it useful for pharmaceutical, agrochemical, materials, and research-chemical development.
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For purchasing, I recommend evaluating more than the CAS number alone. Buyers should confirm chemical identity, assay, water content, residual solvents, impurity profile, packaging, storage conditions, documentation, minimum order quantity, and lead time against the requirements of the intended reaction or development stage.
This guide is intended for R&D chemists, procurement teams, process-development groups, contract manufacturers, and distributors sourcing 2-Bromophenylboronic acid. It is especially relevant when a project requires a reliable aryl boronic acid intermediate rather than a generic laboratory reagent. I also recommend using this information as a screening framework, while treating the supplier’s current specification sheet and safety data sheet as the controlling documents.
The material may be purchased for milligram-scale research, gram-scale route development, or larger campaign planning. The appropriate supplier specification can differ substantially between these stages because research users may prioritize availability and pack size, while process buyers may prioritize batch consistency, analytical documentation, supply continuity, and change-control procedures.
| Parameter | Information |
|---|---|
| Common name | 2-Bromophenylboronic acid |
| Alternative name | (2-Bromophenyl)boronic acid |
| CAS Number | 244205-40-1 |
| Molecular formula | C6H6BBrO2 |
| Approximate molecular weight | 200.83 g/mol |
| Functional groups | Aryl bromide and boronic acid |
The molecular weight shown above is calculated from the stated molecular formula and standard atomic weights, so individual supplier documents may display minor rounding differences. The boronic acid group is commonly used as a coupling handle, while the aryl bromide provides a second reactive site that may be retained or transformed in a later synthetic step. This combination gives the compound strategic value in convergent synthesis and scaffold diversification.
For an independent identity reference, buyers can consult the U.S. National Library of Medicine PubChem database and search by CAS Number 244205-40-1. Because commercial records can vary in naming conventions, I recommend matching the CAS number, molecular formula, structure, and supplier CoA before release for use.
Commercial 2-Bromophenylboronic acid is generally supplied as a solid, but the exact appearance, color, assay, melting behavior, and water content should be confirmed from the current batch documentation. Boronic acids can be sensitive to moisture, storage history, and analytical method, so a catalog description should not replace a batch-specific certificate of analysis. Buyers should also distinguish the free boronic acid from protected derivatives such as boronate esters, which have different handling and reaction behavior.
A conservative storage approach is to keep the material tightly closed, dry, and protected from conditions specified as incompatible in the supplier’s SDS. Many laboratories use controlled room-temperature or cool, dry storage depending on the supplier recommendation, but I would not assign a universal storage temperature or shelf life without product-specific stability data. Before opening, the receiving team should inspect the container, label, lot number, seal, and any evidence of moisture exposure.
The primary synthetic use of 2-Bromophenylboronic acid is as an aryl boronic acid coupling partner. Under an appropriate palladium-catalyzed Suzuki–Miyaura protocol, the boronic acid group can participate in carbon–carbon bond formation with a compatible aryl or vinyl halide. The actual conversion depends on the catalyst, base, solvent, temperature, substrate structure, atmosphere, concentration, and work-up conditions, so the CAS number alone does not guarantee a particular yield.
Its ortho-bromo substituent can be valuable when a project needs a differentiated aromatic intermediate. A chemist may use the two functional handles sequentially or exploit chemoselective route design, although the order of transformations must be validated experimentally. Steric effects near the boronic acid group may also influence reaction rate, selectivity, solubility, and product isolation.
Medicinal chemistry teams may use this compound to introduce a substituted biaryl or heteroaryl–aryl motif during analog synthesis. Process-development teams may evaluate it as an intermediate for a route in which the bromine atom remains available for subsequent substitution, coupling, or other functional-group transformations. These applications are route-dependent, and the material should be qualified against the impurity controls required by the final intermediate or active ingredient process.
In agrochemical and materials research, aryl boronic acids can support the preparation of functional aromatic structures, conjugated fragments, and screening compounds. I recommend confirming that the selected grade is suitable for the intended purpose, particularly where metal residues, trace halides, water, or oxidation-related impurities may affect downstream performance.
There is usually no single universal specification for every buyer. A research laboratory may accept an assay specification of 95% or higher for an early screening experiment, whereas a process-development program may require a tighter assay and defined limits for related substances, residual solvents, inorganic residues, and water. The correct acceptance criteria should be connected to the reaction’s sensitivity and the quality requirements of the downstream product.
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| Specification Area | What Buyers Should Confirm |
|---|---|
| Identity | CAS Number, structure, formula, molecular weight, and analytical identity |
| Assay | Method, reported result, basis of calculation, and acceptance limit |
| Related substances | Known and unknown impurity limits, including possible debrominated or oxidized species |
| Water content | Analytical method and result, especially for moisture-sensitive reactions |
| Residual solvents | Solvent identity and limits where applicable |
| Packaging | Container material, net weight, sealing method, and lot traceability |
| Documentation | CoA, SDS, specification sheet, and shipping documents where required |
For analytical confirmation, a supplier may provide techniques such as proton NMR, carbon NMR, infrared spectroscopy, high-performance liquid chromatography, gas chromatography for suitable volatile impurities, and elemental or halide analysis where relevant. The specific methods and acceptance limits must be reviewed rather than assumed. The European Chemicals Agency information portal provides general regulatory and chemical-safety context, but it does not replace the supplier’s product-specific SDS or CoA.
First, identify whether the purchase is for route scouting, medicinal chemistry, scale-up, method validation, or commercial production. This determines the appropriate pack size, documentation level, impurity control, and supply expectation. A 1 g research pack and a kilogram-scale process order should not be evaluated using the same purchasing criteria.
Ask the chemist which attributes are most important for the planned transformation. In some reactions, water content or palladium-poisoning impurities may be more important than a small difference in nominal assay, while in other cases the principal concern may be batch-to-batch consistency or ease of filtration. Where the compound is used in a multi-step synthesis, impurity carryover should be considered before approval.
Request current pricing for the exact quantity, grade, packaging configuration, and destination. Price comparisons should include minimum order quantity, sample availability, production lead time, shipping conditions, customs documentation, and any required repacking or testing. A lower unit price may not represent a lower total procurement cost if it creates delays, excess inventory, or additional incoming testing.
A credible supplier should be able to explain the source or manufacturing route at an appropriate level, provide lot-specific documentation, and communicate how specifications are controlled. Buyers should ask whether the supplier supports repeat orders, custom packaging, pre-shipment document review, and technical communication between procurement and laboratory teams. It is also reasonable to request a sample or representative CoA before committing to a larger order, subject to commercial and confidentiality requirements.
Pricing for 2-Bromophenylboronic acid can vary with assay, order quantity, packaging, production route, testing requirements, and market availability. I recommend requesting at least three commercial quantities, such as 1 g, 100 g, and 1 kg, when planning a development program, while recognizing that actual minimum order quantities and lead times must be confirmed by quotation. Published catalog prices should be treated as indicative because they may not include logistics, taxes, special testing, or export-related costs.
Lead time may range from stocked fulfillment to made-to-order production, depending on the required grade and quantity. For a time-sensitive project, confirm whether the quoted material is physically available, whether the quoted lead time is production time or total delivery time, and whether the lot will be released only after final testing. A written quotation should state product name, CAS Number, specification, pack size, Incoterms where applicable, validity period, and documentation included.
2-Bromophenylboronic acid should be handled by trained personnel using the controls specified in the current SDS. Standard laboratory precautions normally include avoiding unnecessary dust generation, using suitable eye and skin protection, maintaining appropriate ventilation, and preventing ingestion or uncontrolled environmental release. The exact hazard classification, personal protective equipment, first-aid measures, and transport status must be taken from the supplier’s SDS and the regulations applicable at the shipping and receiving locations.
For international procurement, buyers should check whether the destination requires specific chemical registration, labeling, import documentation, or waste-disposal controls. The U.S. Occupational Safety and Health Administration Hazard Communication Standard explains the general importance of labels and safety data sheets in workplace chemical communication. Local requirements may differ, so the importer or end user remains responsible for confirming compliance.
At Maison Chemical, I recommend beginning with a specification-led quotation rather than a product-name-only inquiry. Our team can review the requested CAS Number, target quantity, preferred assay, packaging format, documentation needs, destination, and expected delivery schedule before confirming a commercial offer. This approach helps align the material with the buyer’s route-development or production requirements.
We can discuss options for research quantities, larger project quantities, repeat supply, documentation packages, and shipment coordination, subject to current availability and product-specific review. Buyers may send their required specification, target pack size, destination country, and timeline so that we can assess the most suitable supply arrangement. Any final quality claim, lead time, and commercial condition should be confirmed in the formal quotation and accompanying product documents.
2-Bromophenylboronic acid CAS 244205-40-1 is a practical choice when a synthesis requires an aromatic boronic acid together with a retained ortho-bromo functionality. The best supplier is not necessarily the one offering the lowest listed price; it is the supplier that can match the required identity, quality profile, documentation, quantity, delivery schedule, and technical support. Buyers should validate the product with current batch documentation and, where appropriate, a sample evaluation before placing a larger order.
As a next step, prepare your target quantity, intended application, minimum assay, impurity and water requirements, packaging preference, destination, and required delivery date. Send these details to Maison Chemical for a product-specific quotation and supply review. We can then help determine whether the available material and documentation are suitable for your research, process-development, or manufacturing program.
Contact us to discuss your requirements of 2-Bromophenylboronic acid CAS 244205-40-1. Our experienced sales team can help you identify the options that best suit your needs.