Description

p-Toluenesulfinic Acid is a versatile organosulfur compound that serves as a key intermediate and reagent in advanced organic synthesis. Its value lies in its ability to act as a nucleophilic sulfinate anion source, enabling the construction of sulfones and other sulfur-containing molecules critical to modern chemistry. This product is essential for research and development laboratories, pharmaceutical manufacturers, and agrochemical producers seeking to develop new active ingredients and functional materials.

Application

• Pharmaceutical Intermediate: A crucial building block in the synthesis of sulfone-based drugs and active pharmaceutical ingredients (APIs).
• Polymerization Catalyst & Modifier: Used in controlled radical polymerization processes and as a modifier for polymer properties.
• Agrochemical Synthesis: Employed in the production of herbicides, fungicides, and other crop protection agents containing sulfone moieties.
• Organic Synthesis Reagent: Facilitates sulfonylation reactions, C-S bond formation, and serves as a precursor to p-tolylsulfonyl derivatives.
• Cross-coupling Reactions: Acts as a coupling partner in palladium-catalyzed reactions for creating complex molecular architectures.
• Material Science Research: Used in developing novel organic electronic materials and liquid crystals.

Basic Information

Product Name	p-Toluenesulfinic Acid
CAS No.	536-57-2
Molecular Formula	C7H8O2S
Molecular Weight	156.20 g/mol
Synonyms	4-Methylbenzenesulfinic Acid; p-Tolylsulfinic Acid; Tosylsulfinic Acid; 4-Toluenesulfinic Acid; Benzenesulfinic acid, 4-methyl-; TSA; p-TSA; Toluenesulfinic Acid
EINECS	208-634-0

Quality Control

Our p-Toluenesulfinic Acid is manufactured under a strict quality management system. Each batch undergoes comprehensive analytical testing, including HPLC for purity and identity confirmation by FT-IR and NMR, to ensure it meets the high standards required for synthetic applications. A Certificate of Analysis (COA) detailing all test results is provided with every shipment.

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 handle and store the material under an inert atmosphere (e.g., nitrogen) 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	84 - 88 °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.