Description

3,4-Dimethylbenzenesulfonic Acid is a versatile organic sulfonic acid derivative, serving as a key intermediate and catalyst in advanced chemical synthesis. Its value lies in its strong acidity and solubility in organic media, making it an effective reagent where mineral acids are unsuitable. This compound is essential for manufacturers in the pharmaceutical, agrochemical, and specialty chemical industries, particularly for producing dyes, pigments, and performance polymers.

Application

• Pharmaceutical Intermediate: Used in the synthesis of active pharmaceutical ingredients (APIs) and fine chemicals.
• Catalyst & Reagent: Acts as an acid catalyst in organic reactions such as esterification, alkylation, and condensation.
• Dye & Pigment Manufacturing: Serves as a key intermediate in the production of sulfonated dyes and colorants.
• Polymer & Resin Production: Employed in the synthesis of ion-exchange resins and specialty polymers.
• Agrochemical Synthesis: Used as a building block for manufacturing certain herbicides and plant protection agents.
• Research & Development: A valuable reagent in laboratory-scale organic synthesis and process development.

Basic Information

Product Name	3,4-Dimethylbenzenesulfonic Acid
CAS No.	618-01-9
Molecular Formula	C8H10O3S
Molecular Weight	186.23 g/mol
Synonyms	3,4-Xylenesulfonic Acid; 4-Methyl-o-toluenesulfonic Acid; 1,2-Dimethyl-4-sulfobenzene; 3,4-Dimethylphenylsulfonic Acid; 3,4-DMBA-SO3H; o-Xylene-4-sulfonic Acid
EINECS	210-535-3

Quality Control

Our 3,4-Dimethylbenzenesulfonic Acid is produced under a strict quality management system. Each batch undergoes comprehensive analytical testing to ensure it meets precise specifications for identity, purity, and impurity profiles. A Certificate of Analysis (COA) detailing the results is provided with every shipment to guarantee traceability and compliance with your requirements.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and 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 should 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
Identification (IR)	Conforms to structure
Assay (Titration)	≥ 98.0%
Water Content (KF)	≤ 1.0%
Melting Point	Contact for details
Heavy Metals (as Pb)	≤ 20 ppm
Residue on Ignition	≤ 0.1%

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