Description

3-Mercaptophenylboronic Acid is a versatile bifunctional organoboron compound that serves as a critical building block in modern synthetic chemistry. Its unique structure, featuring both a boronic acid and a thiol group, enables its use in cross-coupling reactions and as a linker for bioconjugation. This high-purity intermediate is essential for researchers and manufacturers in the pharmaceutical and advanced materials sectors developing new active ingredients and functional polymers.

Application

• Pharmaceutical Intermediate: Key precursor in the synthesis of active pharmaceutical ingredients (APIs), particularly for Suzuki-Miyaura cross-coupling reactions.
• Bioconjugation & Protein Labeling: The thiol group allows for site-specific conjugation to proteins, antibodies, and other biomolecules for diagnostic and therapeutic applications.
• Polymer & Material Science: Monomer for creating functionalized polymers, hydrogels, and boronate-affinity materials used in sensors and separation media.
• Ligand Synthesis: Building block for constructing complex ligands used in catalysis and metal-organic frameworks (MOFs).
• Chemical Research: Valuable reagent in organic synthesis for constructing complex molecular architectures containing C-S and C-B bonds.

Basic Information

Product Name	3-Mercaptophenylboronic Acid
CAS No.	352526-01-3
Molecular Formula	C6H7BO2S
Molecular Weight	153.99 g/mol
Synonyms	(3-Mercaptophenyl)boronic Acid; 3-Sulfanylphenylboronic Acid; 3-Boronobenzenethiol; m-Mercaptophenylboronic Acid; 3-Thiophenylboronic Acid; Boronic acid, B-(3-mercaptophenyl)-; 352526-01-3; m-Thiophenylboronic Acid
EINECS	Contact for details

Quality Control

Our 3-Mercaptophenylboronic Acid is manufactured under strict quality management systems. Each batch undergoes comprehensive analytical testing, including HPLC for purity and identity confirmation by NMR and IR spectroscopy, to ensure it meets the high standards required for research and production. Certificates of Analysis (COA) with detailed batch-specific data are provided to guarantee traceability and consistency.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated place. Due to its hygroscopic (moisture-sensitive) nature, the container should be kept sealed under an inert atmosphere (e.g., nitrogen or argon) for long-term storage to prevent oxidation and hydrolysis. Recommended storage temperature: 2-8°C.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Purity (HPLC)	≥ 97.0%
Water Content (KF)	≤ 1.0%

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.