When I evaluate 4-Methoxyphenylboronic acid, CAS 5720-07-0 for a purchasing or development project, I treat the decision as more than a simple price comparison. I first confirm the chemical identity, requested quality grade, analytical documentation, packaging, transport requirements, and expected supply volume. The compound is also known as 4-anisylboronic acid, and its molecular formula is commonly represented as C7H9BO3, with a molecular weight of approximately 151.96 g/mol. Maison Chemical can support buyers by reviewing these requirements before quotation and aligning the proposed supply with the intended application.
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This guide is designed for procurement teams, organic synthesis laboratories, process development groups, quality departments, and chemical distributors. It is particularly useful when a buyer needs to compare several suppliers or move from gram-scale research use to repeat or bulk purchasing. The goal is to create a practical checklist for confirming specifications, COA and SDS documentation, packaging, and commercial supply conditions.
Because requirements differ between research, process development, and manufacturing, I do not recommend using one generic specification for every project. A laboratory may focus on identity and assay, while a quality department may also require impurity limits, analytical methods, traceability, and change-control information. The final acceptance criteria should therefore be approved by the buyer’s technical and quality teams.
4-Methoxyphenylboronic acid is an aromatic boronic acid containing a methoxy-substituted phenyl group and a boronic acid functional group. In synthetic chemistry, it is commonly considered an aryl boronic acid building block for carbon–carbon bond-forming research, especially Suzuki–Miyaura coupling workflows. The actual suitability of a batch depends on the reaction system, catalyst, solvent, water content, substrate combination, and the buyer’s process controls.
The CAS number is an important identity reference, but it should not be the only identity check. I recommend confirming the CAS number together with the chemical name, molecular formula, molecular weight, structural representation, and analytical data. For regulated or quality-sensitive projects, the supplier should also provide a lot-specific certificate rather than relying only on a catalog description.
A commercial inquiry should clearly state “4-Methoxyphenylboronic acid, CAS 5720-07-0” and, where relevant, the preferred synonym “4-anisylboronic acid.” The buyer should compare the supplier’s product information with the expected molecular formula of C7H9BO3 and approximate molecular weight of 151.96 g/mol. If the supplier presents conflicting identity information, I recommend pausing the order until the discrepancy is resolved.
Many buyers request an assay target such as 98.0% or higher, but the correct limit must be agreed before purchase and confirmed on the applicable COA. A specification may also include appearance, water content, residual solvents, related substances, and inorganic or metal-related impurities, depending on the application. I advise buyers to distinguish between a supplier’s standard specification and a project-specific specification, because a tighter limit can affect testing, yield, price, and lead time.
| Item to Review | What the Buyer Should Confirm |
|---|---|
| Identity | CAS 5720-07-0, chemical name, formula, molecular weight, and analytical identification |
| Assay | Acceptance limit, test method, reporting basis, and lot-specific result |
| Physical description | Expected color, form, and any appearance-related acceptance criteria |
| Impurities | Related substances, residual solvents, water, and project-specific contaminants |
| Documentation | COA, SDS, batch or lot number, production date, and retest or review information where applicable |
I recommend reviewing the COA before placing a repeat or bulk order, not only after the material arrives. The document should identify the product, lot or batch number, test items, analytical results, specification limits, test methods, and approval information. The COA lot number should match the label on the container and the shipment documents.
Buyers should also check whether the reported assay is based on an “as is” basis, a dry basis, or another calculation basis. If the project depends on a specific analytical technique, such as HPLC, NMR, or another internal method, the buyer should ask whether the supplier’s method is comparable. Where the data are not directly comparable, a pre-shipment sample or method discussion may reduce qualification risk.
The SDS should be reviewed by the buyer’s EHS and logistics teams before shipment. Important sections commonly include product identification, hazard classification, handling and storage, exposure controls, personal protective equipment, accidental release measures, transport information, and disposal considerations. I recommend checking that the SDS product name and CAS number correspond to the material being quoted.
An SDS is a hazard communication document, not a guarantee of product purity or process performance. It should therefore be used together with the COA and product specification. The buyer remains responsible for determining whether the material can be handled safely under its own workplace, regulatory, and transportation procedures.
Packaging should be selected according to order size, handling frequency, transport route, and the buyer’s storage system. Small research quantities may be suitable for tightly closed laboratory containers, while larger orders may require a more formal inner-and-outer packaging configuration. As a planning reference, buyers may compare quantities such as 100 g, 1 kg, and 25 kg, but the available pack size, container type, and minimum order quantity must be confirmed for each quotation.
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I advise buyers to ask how the product is protected from moisture, contamination, and repeated exposure during handling. The packaging label should normally provide the product name, CAS number, net weight, lot number, and relevant handling information. For international shipments, the buyer should also confirm whether the packaging and shipping documents are suitable for the destination country and the selected transport mode.
Start with the intended use, target quantity, required assay, impurity expectations, preferred analytical method, and delivery location. If the material will be used in a sensitive reaction or process, state the critical quality attributes in the inquiry. This gives the supplier a basis for proposing a suitable standard or customized specification.
Do not compare unit prices without reviewing the complete offer. A meaningful comparison should include product price, packaging, shipping terms, sample availability, testing charges, lead time, payment terms, and any required documentation. A lower unit price may not be commercially advantageous if it comes with a longer lead time, unsuitable packaging, or insufficient analytical support.
For recurring projects, ask whether the supplier can support repeat batches and whether the specification can remain consistent across production lots. I also recommend asking about forecast requirements, production scheduling, and the process for communicating material or manufacturing changes. These questions are especially important when a buyer expects to scale from laboratory quantities to kilogram or multi-kilogram demand.
At minimum, request a product specification, representative or lot-specific COA, SDS, packaging details, and quotation validity. Depending on the project, additional documents may include a statement of origin, residual solvent information, allergen or animal-origin statements, or other buyer-specific declarations. Such documents should only be provided when they are applicable and supportable for the quoted material.
One common mistake is treating the CAS number as a complete quality specification. Another is accepting a generic COA without checking whether the lot number, test method, and specification limits are clearly stated. Buyers can also create avoidable delays by requesting a very tight impurity profile only after the quotation has been issued.
Another frequent issue is overlooking storage and transport instructions. The receiving team should understand the supplier’s recommended conditions and verify that the shipment can be handled at the destination. I also recommend confirming whether the buyer needs a sample approval step before committing to a larger quantity.
At Maison Chemical, I approach inquiries by first clarifying the product identity, target quantity, application context, documentation needs, and destination. We can discuss standard specifications, requested analytical items, packaging options, and the difference between a research-scale order and a bulk supply plan. This helps buyers receive a quotation that reflects their actual requirements rather than a generic product listing.
For qualified inquiries, our support can include COA and SDS review, packaging coordination, export document discussion, and supply planning. Availability, MOQ, lead time, and final commercial terms depend on the requested grade, quantity, destination, and current production schedule. I recommend sending these details at the beginning so that the proposed solution can be evaluated efficiently.
The most reliable way to purchase 4-Methoxyphenylboronic acid CAS 5720-07-0 is to qualify the complete supply package: identity, specification, COA, SDS, packaging, logistics, and repeat-batch capability. I recommend preparing a written requirement that includes quantity, target quality, application, destination, required documents, and preferred delivery schedule. This creates a clear basis for comparing suppliers and reduces the risk of receiving a material that does not match the project’s acceptance criteria.
Maison Chemical can help procurement, R&D, and quality teams review these points and prepare a practical B2B quotation. To begin, share your required quantity, specification or assay target, packaging preference, destination, and documentation needs. We can then discuss the appropriate supply route for your 4-Methoxyphenylboronic acid project.
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