3-(Hydroxymethyl)Phenylboronic Acid for Vacuum: Bulk Purity & Supply
Technical Specifications and Purity Grades of 3-(Hydroxymethyl)phenylboronic Acid for Vacuum Applications
In high-vacuum organic synthesis, the performance of boronic acid derivatives hinges on precise purity control. 3-(Hydroxymethyl)phenylboronic acid (CAS 87199-15-3), also referred to as 3-boronobenzyl alcohol or m-hydroxymethylphenylboronic acid, is a critical building block for Suzuki-Miyaura cross-coupling reactions. When operating under vacuum, residual solvents or inorganic salts can outgas, compromising reaction integrity. Our industrial-grade material is manufactured to meet the stringent demands of vacuum environments, with typical purity exceeding 98% by HPLC. This phenylboronic acid analog is supplied as a crystalline powder, minimizing volatile contaminants. For procurement managers, understanding the interplay between purity and vacuum stability is essential. We offer two standard grades: Technical Grade (≥98%) for general synthesis and High-Purity Grade (≥99%) for sensitive electronic or pharmaceutical intermediates. The table below outlines key specifications.
| Parameter | Technical Grade | High-Purity Grade |
|---|---|---|
| Assay (HPLC) | ≥98.0% | ≥99.0% |
| Water Content (KF) | ≤0.5% | ≤0.2% |
| Melting Point | 95–102°C | 97–100°C |
| Appearance | White to off-white powder | White crystalline powder |
| Solubility (THF, 25°C) | Clear, colorless solution | Clear, colorless solution |
For vacuum applications, the High-Purity Grade is recommended due to its lower volatile content. However, even Technical Grade can be suitable if post-reaction purification is planned. We advise reviewing the batch-specific COA for exact values.
Certificate of Analysis (COA) Parameters: Ensuring Batch-to-Batch Consistency in High-Vacuum Environments
Batch-to-batch consistency is non-negotiable in industrial vacuum processes. Our COA for 3-(hydroxymethyl)phenylboronic acid includes critical parameters beyond standard assay: loss on drying, residue on ignition, and trace metals by ICP-MS. For vacuum-sensitive applications, we also report headspace GC-MS for residual solvents. This ensures that no unexpected volatiles disrupt your vacuum levels. A typical COA will list:
- Assay (HPLC): ≥99.0% (area normalization)
- Water (KF): ≤0.2%
- Melting Point: 97–100°C
- Residue on Ignition: ≤0.1%
- Heavy Metals (as Pb): ≤10 ppm
- Residual Solvents: Meets Ph.Eur. Class 3 limits
We understand that in vacuum distillation or sublimation setups, even trace impurities can cause bumping or decomposition. Our manufacturing process, which includes recrystallization from toluene/heptane, minimizes these risks. For customers requiring additional testing, such as particle size distribution or sub-visible particulates, we can accommodate custom COA requests. This level of transparency is what makes us a reliable global manufacturer for your synthesis route.
Bulk Packaging and Handling: IBC Totes, 210L Drums, and Stability Under Vacuum
When scaling up from lab to pilot plant, packaging integrity directly impacts product quality under vacuum. We supply 3-(hydroxymethyl)phenylboronic acid in a range of bulk containers: 25 kg fiber drums with PE liner, 210L steel drums, and 1000L IBC totes. For vacuum applications, moisture ingress is the primary concern. Our packaging is nitrogen-flushed and vacuum-sealed to maintain the anhydrous state. During winter shipping, we have observed that the crystalline powder can develop slight caking due to static charge, but this does not affect chemical purity. For detailed handling procedures, refer to our article on bulk storage and winter shipping of 3-(hydroxymethyl)phenylboronic acid. We recommend storing the product in a cool, dry place (15–25°C) and using it within 12 months of the manufacture date. For vacuum transfer systems, the powder can be charged directly into reactors under inert atmosphere using glovebox ports or vacuum conveyors.
Non-Standard Behavior in Vacuum: Viscosity Shifts, Sublimation, and Trace Impurities
Field experience has revealed that 3-(hydroxymethyl)phenylboronic acid exhibits subtle but important non-standard behaviors under high vacuum. At pressures below 0.1 mbar, we have noted a slight tendency for sublimation at temperatures above 80°C. This can lead to product loss and contamination of vacuum lines. To mitigate this, we recommend using a cold trap or maintaining temperatures below 60°C during vacuum drying. Another edge-case behavior involves trace boronic anhydride formation, which can increase the apparent viscosity of solutions in polar aprotic solvents. This is often mistaken for incomplete dissolution. In reality, the anhydride species (formed via dehydration of the boronic acid) has a higher molecular weight and can cause gel-like consistency. Our manufacturing process controls the anhydride content to <1%, but for critical applications, we can provide material with a certified anhydride level. Additionally, trace iron impurities (from reactor vessels) can impart a faint yellow color to the powder, though this does not affect reactivity. We monitor iron content by ICP-MS and keep it below 5 ppm. These insights come from years of hands-on production and customer feedback, ensuring that your vacuum processes run smoothly.
Supply Chain Reliability and Drop-in Replacement Strategy for Industrial Procurement
For procurement managers, supply chain resilience is as critical as product quality. Our 3-(hydroxymethyl)phenylboronic acid serves as a seamless drop-in replacement for major brands, offering identical technical parameters and performance. We maintain a stable supply of 5–10 metric tons per month, with safety stock in both our Ningbo and Rotterdam warehouses. This dual-warehouse strategy ensures lead times of 7–10 days for most destinations. Our product is a direct equivalent to Sigma-Aldrich 512834 and other commercial sources, as detailed in our drop-in replacement guide. By choosing our material, you reduce costs by 30–50% without compromising on quality. We provide full documentation, including COA, MSDS, and TSE/BSE statements. Our quality system is ISO 9001:2015 certified, and we welcome customer audits. For your vacuum synthesis needs, trust a verified manufacturer with a proven track record. Explore our product page for detailed specifications: high-purity 3-(hydroxymethyl)phenylboronic acid for organic synthesis.
Frequently Asked Questions
What is the minimum order quantity (MOQ) for bulk purchases?
Our standard MOQ is 1 kg for sample evaluation. For commercial orders, we typically supply in 25 kg drums, but we can accommodate smaller quantities for initial trials. Contact our sales team for a tailored quote.
Can you provide custom packaging for vacuum-sensitive applications?
Yes, we offer nitrogen-flushed, vacuum-sealed packaging in various sizes. For extremely moisture-sensitive processes, we can supply the product in glass ampoules under argon. Please specify your requirements when ordering.
How do you ensure batch-to-batch consistency for industrial vacuum processes?
We employ rigorous in-process controls and final product testing per our COA. Each batch is analyzed for assay, water content, melting point, and residual solvents. We also retain samples for 24 months for retrospective analysis.
What is the shelf life of 3-(hydroxymethyl)phenylboronic acid under recommended storage conditions?
When stored in unopened, original packaging at 15–25°C, the product has a shelf life of 12 months. Retesting after this period is recommended to confirm purity before use in critical applications.
Do you offer technical support for vacuum process optimization?
Absolutely. Our team of PhD chemists can assist with solubility, stability, and handling questions. We can also provide small-scale samples for compatibility testing in your specific vacuum setup.
Sourcing and Technical Support
In summary, 3-(hydroxymethyl)phenylboronic acid is a versatile boronic acid derivative that demands careful handling in vacuum environments. By choosing a supplier with deep technical expertise and robust logistics, you can avoid costly downtime and ensure consistent reaction outcomes. We are committed to being your long-term partner for this critical intermediate. Partner with a verified manufacturer. Connect with our procurement specialists to lock in your supply agreements.