Description

2-Hydroxy-3-Methyl-Benzenesulfonic Acid is a versatile aromatic sulfonic acid derivative that serves as a critical intermediate in advanced organic synthesis. Its value lies in the combination of a phenolic hydroxyl group and a sulfonic acid moiety, enabling its use in the production of high-performance dyes, pigments, and specialty chemicals. This compound is essential for manufacturers in the agrochemical, pharmaceutical, and fine chemical industries seeking to introduce specific solubility and reactivity profiles into their target molecules.

Application

• Dye and Pigment Intermediate: A key building block for synthesizing azo dyes, acid dyes, and other colorants, where the sulfonic acid group enhances water solubility and fiber affinity.
• Agrochemical Synthesis: Used in the manufacture of certain herbicides and plant growth regulators, acting as a precursor to introduce specific functional groups.
• Pharmaceutical Intermediate: Employed in the synthesis of active pharmaceutical ingredients (APIs) that require a benzenesulfonic acid backbone for salt formation or biological activity.
• Corrosion Inhibitor Formulation: Functions as a component in specialty chemical blends designed to protect metal surfaces in industrial processes.
• Electroplating Additive: Serves as a brightening agent or stabilizer in electroplating baths to improve the quality and uniformity of metal deposits.
• Polymer Modification: Acts as a monomer or modifying agent in the production of ion-exchange resins and specialty polymers.

Basic Information

Product Name	2-Hydroxy-3-Methyl-Benzenesulfonic Acid
CAS No.	52277-26-6
Molecular Formula	C7H8O4S
Molecular Weight	188.20 g/mol
Synonyms	3-Methylsalicylic acid-2-sulfonic acid; 2-Hydroxy-3-methylbenzenesulphonic acid; 3-Methyl-2-hydroxybenzenesulfonic acid; o-Cresol-2-sulfonic acid; 2-Hydroxy-m-toluenesulfonic acid; 3-Methyl-2-sulfophenol; 2-Sulfo-3-methylphenol
EINECS	Contact for details

Quality Control

Our 2-Hydroxy-3-Methyl-Benzenesulfonic Acid is produced under a stringent quality management system. Every batch undergoes rigorous analytical testing, including HPLC for purity and identity confirmation, to ensure it meets precise customer specifications and industry standards. A comprehensive Certificate of Analysis (COA) detailing all test results is provided with each shipment to guarantee traceability and compliance.

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 after opening 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 (HPLC)	≥ 98.0%
Loss on Drying	≤ 2.0%
Residue on Ignition	≤ 0.5%
Heavy Metals (as Pb)	≤ 20 ppm

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