Description

4-Methylsulfanyl-Benzenesulfonic Acid is a specialized organosulfur compound that serves as a valuable building block and intermediate in advanced chemical synthesis. Its unique structure, featuring both sulfonic acid and methylthio functional groups, makes it a versatile reagent for introducing specific functionalities into target molecules. This high-purity intermediate is essential for research and production in the pharmaceutical, agrochemical, and material science industries, where precise molecular architecture is critical.

Application

• Pharmaceutical Intermediate: A key building block in the synthesis of active pharmaceutical ingredients (APIs), particularly for compounds requiring a sulfonamide or sulfonate ester moiety.
• Agrochemical Synthesis: Used in the production of advanced herbicides, fungicides, and plant growth regulators, leveraging its reactive sites for molecular diversification.
• Dye & Pigment Manufacturing: Acts as an intermediate in the synthesis of sulfur-containing dyes and specialty pigments, contributing to color fastness and stability.
• Polymer & Material Science: Employed as a monomer or functionalization agent in the creation of ion-exchange resins, conductive polymers, and other advanced materials.
• Chemical Research & Development: Serves as a versatile reagent in organic synthesis for academic and industrial R&D, enabling novel reaction pathways.
• Ligand & Catalyst Preparation: Useful for synthesizing specialized ligands for metal catalysis and coordination chemistry.

Basic Information

Product Name	4-Methylsulfanyl-Benzenesulfonic Acid
CAS No.	70140-60-2
Molecular Formula	C7H8O3S2
Molecular Weight	204.26 g/mol
Synonyms	4-(Methylthio)benzenesulfonic Acid; p-(Methylthio)benzenesulfonic Acid; 4-Methylmercaptobenzenesulfonic Acid; Benzenesulfonic acid, 4-(methylthio)-; p-Methylsulfanylbenzenesulfonic Acid; 4-Methylsulfanylbenzene-1-sulfonic Acid; 4-(Methylsulfanyl)benzenesulfonic Acid
EINECS	Contact for details

Quality Control

Our 4-Methylsulfanyl-Benzenesulfonic Acid is manufactured under a strict quality management system to ensure batch-to-batch consistency and high purity. Each lot undergoes comprehensive analytical testing, including HPLC for assay and impurity profiling, to meet exacting customer specifications. A Certificate of Analysis (COA) detailing all test results is provided with every shipment, ensuring full traceability and compliance with relevant industry standards.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at room temperature (15-25°C). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept tightly sealed after opening to prevent absorption of atmospheric moisture. Keep away from strong bases and oxidizing agents.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Loss on Drying	≤ 1.0%
Residue on Ignition	≤ 0.1%
Heavy Metals (as Pb)	≤ 20 ppm

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