Description

2,5-Dimethylbenzenesulfonic Acid Dihydrate is a versatile aromatic sulfonic acid derivative, valued for its strong acidity and utility as an intermediate and catalyst in organic synthesis. Its dihydrate form offers improved handling characteristics and stability for industrial processes. This compound is essential for manufacturers in the agrochemical, pharmaceutical, and specialty chemical sectors seeking a reliable building block for sulfonation reactions and acid catalysis.

Application

• Chemical Intermediate: A key precursor in the synthesis of dyes, pigments, and optical brighteners.
• Catalyst: Used as an acid catalyst in esterification, alkylation, and condensation reactions within fine chemical production.
• Agrochemical Synthesis: Employed in the manufacturing of certain herbicides and plant growth regulators.
• Pharmaceutical Intermediates: Serves as a building block for active pharmaceutical ingredients (APIs) and other drug substances.
• Electroplating Additives: Functions as a brightening agent and leveler in electroplating baths.
• Ion Exchange Resins: Used in the production of specialty ion exchange materials.
• Research & Development: A valuable reagent for academic and industrial R&D in organic chemistry.

Basic Information

Product Name	2,5-Dimethylbenzenesulfonic Acid Dihydrate
CAS No.	66905-17-7
Molecular Formula	C8H10O3S · 2H2O
Molecular Weight	218.24 g/mol (anhydrous basis)
Synonyms	2,5-Xylenesulfonic Acid Dihydrate; p-Xylene-2-sulfonic Acid Dihydrate; 2,5-Dimethylbenzenesulphonic Acid Dihydrate; 1,4-Dimethyl-2-sulfobenzene Dihydrate; 2,5-DMBA Dihydrate; 2,5-Dimethylphenylsulfonic Acid Dihydrate; 2,5-Dimethylbenzene-1-sulfonic Acid Dihydrate
EINECS	Contact for details

Quality Control

Our 2,5-Dimethylbenzenesulfonic Acid Dihydrate is produced under a strict quality management system. Each batch undergoes comprehensive analytical testing to ensure identity, purity, and consistency. A Certificate of Analysis (COA) detailing specific results for assay, water content, and related substances is provided with every shipment, ensuring full traceability and compliance with your technical requirements.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at room temperature (15-25°C). Due to its hygroscopic nature, the container must be kept tightly sealed to prevent moisture absorption, which can affect product quality and handling.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms
Assay (HPLC)	≥ 98.0%
Water Content (KF)	14.0% - 17.0%
Related Substances (HPLC)	≤ 2.0% total
Residue on Ignition	≤ 0.1%

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