Description

2-Toluenesulfonic Acid is a versatile and widely used organic acid catalyst and reagent. This compound is valued for its strong acidity and solubility in organic solvents, making it a key component in numerous synthetic and industrial processes. It is essential for manufacturers in the pharmaceutical, agrochemical, polymer, and specialty chemical sectors seeking efficient and reliable acid catalysts.

Application

• Pharmaceutical Synthesis: As a catalyst in esterification, alkylation, and protection/deprotection reactions for active pharmaceutical ingredients (APIs).
• Polymer Industry: Used as a curing agent and catalyst in the production of phenolic, epoxy, and other thermosetting resins.
• Agrochemical Manufacturing: Employed as an intermediate and catalyst in the synthesis of pesticides, herbicides, and fungicides.
• Dye and Pigment Production: Acts as a catalyst and sulfonating agent in the manufacture of various colorants.
• Organic Synthesis: A common acid catalyst for acetal formation, Friedel-Crafts reactions, and other acid-promoted transformations in fine chemical production.
• Electroplating Additives: Used in plating baths as a brightening agent and conductivity enhancer.

Basic Information

Product Name	2-Toluenesulfonic Acid
CAS No.	88-20-0
Molecular Formula	C7H8O3S
Molecular Weight	172.20 g/mol
Synonyms	o-Toluenesulfonic Acid; 2-Methylbenzenesulfonic Acid; ortho-Toluene Sulfonic Acid; o-TSA; Tosic Acid; 2-TSA; Benzenesulfonic acid, 2-methyl-; Toluene-2-sulfonic acid
EINECS	201-810-9

Quality Control

Our 2-Toluenesulfonic Acid is manufactured under strict quality management systems. Each batch undergoes comprehensive analytical testing to ensure it meets the required specifications for purity, identity, and performance. Certificates of Analysis (COA) are provided with every shipment to guarantee traceability and batch-to-batch consistency for your critical processes.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area. Due to its hygroscopic (moisture-sensitive) nature, containers 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
Assay (Titration)	≥ 98.0 %
Water Content (KF)	≤ 1.0 %
Melting Point	104 - 107 °C
Heavy Metals (as Pb)	≤ 20 ppm
Sulfated Ash	≤ 0.1 %

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