Description

4-Mercaptobenzoic Acid is a versatile aromatic thiol compound that serves as a critical building block in organic synthesis and material science. Its unique structure, featuring both a carboxylic acid and a thiol group, makes it a valuable precursor for creating complex molecules and functional materials. This compound is essential for researchers and manufacturers in the pharmaceutical, agrochemical, and polymer industries, where it is used to introduce specific chemical functionalities.

Application

• Pharmaceutical Intermediates: Key building block for synthesizing active pharmaceutical ingredients (APIs), particularly those requiring thioether or disulfide linkages.
• Polymer Modification & Cross-linking Agent: Used to functionalize polymer chains, introduce thiol groups for "click" chemistry, and act as a cross-linker in specialty resins and coatings.
• Ligand Synthesis for Catalysis: Serves as a precursor for creating chelating ligands used in homogeneous catalysis and metal-organic frameworks (MOFs).
• Surface Functionalization & Self-Assembled Monolayers (SAMs): The thiol group allows for attachment to gold and other metal surfaces, useful in sensor development and nanotechnology.
• Agrochemical Synthesis: Intermediate in the production of certain herbicides, fungicides, and plant growth regulators.
• Bioconjugation & Protein Labeling: Utilized to modify peptides, proteins, and other biomolecules via thiol-specific chemistry.

Basic Information

Product Name	4-Mercaptobenzoic Acid
CAS No.	1074-36-8
Molecular Formula	C7H6O2S
Molecular Weight	154.19 g/mol
Synonyms	4-Thiosalicylic Acid; p-Mercaptobenzoic Acid; 4-Sulfanylbenzoic Acid; Benzoic acid, 4-mercapto-; p-Carboxythiophenol; 4-Carboxyphenyl mercaptan; 4-MBA
EINECS	214-041-6

Quality Control

Our 4-Mercaptobenzoic Acid is produced under a strict quality management system. Each batch undergoes rigorous analytical testing, including HPLC for purity and identity confirmation, to ensure it meets high-grade specifications. Certificates of Analysis (COA) documenting all critical parameters are available upon request to support your quality assurance and regulatory needs.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated place at a controlled room temperature (15-25°C). Due to its sensitivity to oxidation, it is recommended to store the product under an inert atmosphere (e.g., nitrogen or argon) for long-term preservation. Keep away from strong oxidizing agents.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Melting Point	210 - 215 °C
Loss on Drying	≤ 0.5%
Residue on Ignition	≤ 0.1%

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