Description

2(Or 4)-Toluenesulphonic Acid is a versatile aromatic sulfonic acid derivative, commonly used as a strong organic acid catalyst and intermediate in chemical synthesis. Its value lies in its high acidity and solubility in organic solvents, making it a preferred alternative to mineral acids in sensitive reactions. This product is essential for manufacturers in the pharmaceutical, agrochemical, polymer, and specialty chemical industries seeking efficient and controllable acid catalysis.

Application

• Pharmaceutical Synthesis: A key catalyst and intermediate in the production of active pharmaceutical ingredients (APIs), particularly in esterification and protection/deprotection reactions.
• Polymer Industry: Used as a curing agent and catalyst in the production of phenolic, epoxy, and alkyd resins, as well as in polycarbonate synthesis.
• Agrochemical Manufacturing: Serves as a building block and catalyst in the synthesis of herbicides, fungicides, and other crop protection agents.
• Dye and Pigment Production: Acts as a sulfonating agent and catalyst in the manufacture of various dyes and organic pigments.
• Electroplating Additives: Employed in electroplating baths as a brightening agent and conductivity enhancer.
• Chemical Research & Development: A valuable reagent in organic synthesis labs for acid-catalyzed transformations.

Basic Information

Product Name	2(Or 4)-Toluenesulphonic Acid
CAS No.	70788-37-3
Molecular Formula	C7H8O3S
Molecular Weight	172.20 g/mol
Synonyms	Toluene-4-sulfonic Acid; p-Toluenesulfonic Acid; 4-Methylbenzenesulfonic Acid; Tosic Acid; PTSA; Toluenesulfonic Acid; p-TSA; TsOH
EINECS	Contact for details

Quality Control

Our 2(Or 4)-Toluenesulphonic Acid is manufactured under a stringent quality management system. Each batch undergoes comprehensive analytical testing to ensure it meets precise specifications for purity, identity, and impurity profiles. A Certificate of Analysis (COA) documenting these results is provided with every shipment to guarantee traceability and compliance with your quality requirements.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at room temperature (15-25°C). This material is hygroscopic (moisture-sensitive); ensure containers are kept sealed to prevent absorption of atmospheric moisture.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms
Assay (Titration)	≥ 98.0 %
Water Content (KF)	≤ 1.0 %
Sulfated Ash	≤ 0.1 %
Heavy Metals (as Pb)	≤ 10 ppm

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