Description

3-Methylbenzenesulfonic Acid is a versatile aromatic sulfonic acid derivative, serving as a key intermediate and catalyst in numerous industrial chemical processes. Its value lies in its strong acidity and solubility in organic media, making it an effective acid catalyst and a valuable building block for more complex molecules. This product is essential for manufacturers in the pharmaceutical, agrochemical, dye, and polymer industries seeking reliable, high-purity chemical intermediates.

Application

• Chemical Synthesis Intermediate: A crucial building block for producing dyes, pigments, and optical brighteners.
• Acid Catalyst: Used in organic synthesis reactions such as esterification, alkylation, and condensation where a strong, soluble acid catalyst is required.
• Pharmaceutical Manufacturing: Employed in the synthesis of various active pharmaceutical ingredients (APIs) and fine chemicals.
• Polymer Industry: Acts as a curing agent or catalyst in resin formulations and polymerization processes.
• Electroplating Additive: Used in plating baths to improve bath stability and metal deposition quality.
• Research & Development: Serves as a reagent in laboratory-scale organic chemistry and process development.

Basic Information

Product Name	3-Methylbenzenesulfonic Acid
CAS No.	617-97-0
Molecular Formula	C7H8O3S
Molecular Weight	172.20 g/mol
Synonyms	m-Toluenesulfonic Acid; 3-Toluenesulfonic Acid; m-Toluene Sulfonic Acid; 3-Toluene Sulfonic Acid; m-TSA; meta-Toluenesulfonic Acid; Toluene-3-sulfonic Acid; Benzenesulfonic acid, 3-methyl-
EINECS	210-537-3

Quality Control

Our 3-Methylbenzenesulfonic Acid is manufactured under a strict quality management system. Each batch undergoes comprehensive analytical testing to ensure it meets high-purity standards and consistent specifications for industrial and fine chemical applications. Certificates of Analysis (COA) detailing purity, assay, and impurity profiles are provided with every shipment to guarantee traceability and quality assurance.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area away from incompatible materials such as strong bases and oxidizing agents. Due to its nature as a strong acid/organic solvent, containers must be kept tightly sealed to prevent moisture absorption and contamination. Recommended storage temperature is 15-25°C.

Specification

Item	Specification
Appearance	White to off-white crystalline powder or solid
Identification (IR)	Conforms to structure
Assay (Titration)	≥ 98.0%
Water Content (KF)	≤ 1.0%
Melting Point	103 - 107 °C
Heavy Metals (as Pb)	≤ 20 ppm

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