4-Butylphenylboronic acid, CAS 145240-28-4, is an arylboronic acid used as a building block in organic synthesis, including Suzuki–Miyaura cross-coupling research and development. Its para-butyl-substituted phenyl group can be coupled with a suitable reaction partner to help prepare more complex molecules. For purchasing, confirm the required assay, analytical documentation, packaging, and delivery schedule with the supplier; values such as appearance, melting point, and solubility should be verified against the specific product specification rather than assumed.
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This guide is for procurement teams, chemists, and project managers assessing the compound for synthesis or development work. I’ll outline its identity, relevant specifications, application fit, and practical sourcing checks, while distinguishing known identity data from details that need supplier confirmation.
4-Butylphenylboronic acid is an organoboron compound consisting of a phenyl ring bearing a butyl substituent at the para position and a boronic acid group. The boronic acid functionality is commonly used in carbon–carbon bond-forming chemistry. In cross-coupling, the aryl group can be transferred to a suitable coupling partner under conditions selected for the specific substrates and process.
| Item | Reference information | Purchasing note |
|---|---|---|
| Product name | 4-Butylphenylboronic acid | Confirm the exact naming and structure on the supplier specification. |
| CAS number | 145240-28-4 | Use the CAS number alongside the product name when requesting a quotation. |
| Molecular formula | C10H15BO2 | Check identity details against the current batch documentation. |
| Molecular weight | Approximately 178.04 g/mol | Useful for calculating laboratory-scale quantities and reaction charges. |
The most relevant use case is as a coupling building block for synthesizing substituted biaryl or other aryl-containing molecules. Its butyl substituent may be useful when a project requires that specific structural feature, but the suitability of the compound depends on the target molecule, reaction partner, catalyst system, and process conditions. I recommend confirming compatibility through literature review or a controlled screening experiment before planning larger-scale use.
Potential users include research laboratories, custom synthesis teams, and process development groups evaluating organoboron reagents. The compound should not be selected solely because it belongs to the boronic acid family: functional groups on the other reactants, solvent choice, base, catalyst, and work-up can all affect the outcome. For regulated or commercial manufacturing projects, buyers should also assess their own quality, traceability, and change-control requirements.
Grade requirements should follow the application rather than a generic assumption. Early-stage route exploration may allow a different specification from a process that has established impurity limits or requires validated documentation. When requesting a quote, state whether you need a particular assay, impurity profile, analytical method, or document set, and ask the supplier to confirm what is available for the offered batch.
For an initial feasibility study, a buyer might request a small evaluation quantity, such as 1–5 g, if the supplier can offer it. This is a planning example, not a standard pack size or a representation of Maison Chemical’s available inventory. Scale-up quantities should be based on the intended reaction scale, expected conversion, recovery, and contingency needs.
A product name and CAS number establish a useful starting point, but they do not define every quality attribute required for a project. Ask for the current product specification and, where applicable, a batch-specific certificate of analysis (CoA) and safety data sheet (SDS). The documents should identify the material clearly and state which tests or acceptance criteria apply to the supplied lot.
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| Specification area | What to check | Why it matters |
|---|---|---|
| Identity | Product name, CAS number, and available identification test | Helps verify that the quoted material matches the intended reagent. |
| Assay | Target value, test method, and whether the result is batch-specific | Supports reagent calculations and project acceptance criteria. |
| Impurities | Specified limits or reported impurity information, if required | Relevant when impurities could affect reaction performance or downstream processing. |
| Physical properties | Appearance, solubility, or melting point only when documented for the offered material | Avoids relying on values that may vary by source, method, or batch. |
| Packaging and handling | Container type, pack size, storage guidance, and shipping conditions | Allows receiving and EHS teams to plan handling and storage. |
Start by defining the role of the reagent in your route and the consequences of quality variation. If the compound is being used in a screening campaign, prioritize fit-for-purpose identity and assay information alongside manageable pack size. If a process already has tight impurity controls, provide those requirements before quotation so the supplier can confirm whether the requested specification can be supported.
For reaction planning, chemists often screen reagent loading around 1.0–1.5 molar equivalents as an initial experimental range, then adjust based on substrate behavior and the project’s validated method. This is a general screening suggestion, not a product specification or a guaranteed optimum. Follow the reaction protocol and internal safety review for the actual chemistry.
Compare suppliers on more than unit price. Confirm whether the quotation applies to the stated CAS number, the requested assay, the intended quantity, and a specific delivery destination. Ask whether the quoted lead time is an estimate or confirmed availability, and clarify how changes to batch, packaging, or documentation would be communicated.
Minimum order quantity (MOQ), price, and lead time depend on the supplier’s current stock, production or sourcing route, pack size, and destination. I recommend requesting a written quotation that separates the offered specification, quantity, packaging, documentation, shipping terms, and quote validity. This makes it easier to compare like-for-like offers and identify a sourcing risk before placing an order.
Maison Chemical can discuss sourcing requirements for 4-Butylphenylboronic acid CAS 145240-28-4 with B2B buyers. To help us assess an inquiry, provide your target quantity, required assay or grade, destination, preferred packaging, and documentation needs. We can then confirm the details available for the specific offer, including price, MOQ, lead time, and supporting documents, before you make a purchasing decision.
For an application-specific discussion, include the intended use and any critical acceptance criteria, while avoiding disclosure of confidential project information. Clear requirements help align the quote with your technical and procurement needs and reduce avoidable follow-up.
4-Butylphenylboronic acid CAS 145240-28-4 is an arylboronic acid building block that may suit Suzuki–Miyaura coupling and related synthesis work when its para-butyl-substituted structure matches the target. Its molecular formula is C10H15BO2, with a molecular weight of approximately 178.04 g/mol. The right buying decision depends on application fit and the verified specification for the offered batch, not on the product name alone.
Your next step is to send Maison Chemical the required quantity, assay or grade, destination, and documentation expectations. Request confirmation of the current specification, batch records available, packaging, MOQ, price, and lead time before placing an order. This approach gives your technical and procurement teams a clear basis for evaluating the material and moving the project forward.
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