Description

2-Mesitylenesulfonic Acid Dihydrate, 97 is a highly versatile and potent organic sulfonic acid derivative, valued for its strong acidity and solubility in organic media. This compound is essential as a catalyst and reagent in fine chemical synthesis, where its sterically hindered structure offers advantages in selectivity and stability. It is particularly sought after by research and development laboratories, as well as production facilities in the pharmaceutical, agrochemical, and specialty chemical industries for constructing complex molecular architectures.

Application

• Acid Catalyst in Organic Synthesis: Employed as a Brønsted acid catalyst for esterifications, alkylations, and condensation reactions, especially where water-tolerant and recyclable catalysts are needed.
• Pharmaceutical Intermediate: Serves as a key building block or a sulfonating agent in the synthesis of active pharmaceutical ingredients (APIs) and drug candidates.
• Polymerization Catalyst: Used in the production of specialty polymers, resins, and as a curing agent for epoxy systems.
• Research & Development Reagent: A valuable tool in academic and industrial R&D for method development and exploring new synthetic pathways.
• Agrochemical Synthesis: Utilized in the manufacturing of herbicides, fungicides, and other crop protection agents.
• Dye and Pigment Production: Acts as an intermediate or catalyst in the synthesis of complex organic colorants.

Basic Information

Product Name	2-Mesitylenesulfonic Acid Dihydrate, 97
CAS No.	835617-36-2
Molecular Formula	C9H14O5S
Molecular Weight	234.27 g/mol
Synonyms	2,4,6-Trimethylbenzenesulfonic Acid Dihydrate; Mesitylenesulfonic Acid Dihydrate; MSA Dihydrate; 2-Mesitylenesulfonic Acid Hydrate; 2,4,6-Trimethylphenylsulfonic Acid Dihydrate; Toluene-2,4,6-trisulfonic Acid (related); TsOH•2H2O (analogous); MTSA
EINECS	Contact for details

Quality Control

Our 2-Mesitylenesulfonic Acid Dihydrate, 97 is manufactured under strict quality control protocols to ensure batch-to-batch consistency and reliability. Each lot is analyzed to confirm identity, purity, and the absence of critical impurities. A comprehensive Certificate of Analysis (COA) detailing all test results is provided with every shipment, supporting your quality assurance and regulatory compliance needs.

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 (moisture-sensitive) nature, the container must be kept tightly sealed 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 to structure
Assay (Titration)	≥ 97.0%
Water Content (KF)	≈ 15.4% (theoretical for dihydrate)
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.