Description

3-Hydroxy-5-Methylbenzenesulfonic Acid is a versatile aromatic sulfonic acid derivative that serves as a key intermediate in the synthesis of more complex organic molecules. Its value lies in its dual functionality, featuring both a phenolic hydroxyl group and a strongly acidic sulfonic acid group, making it a valuable building block for dyes, pharmaceuticals, and agrochemicals. This compound is essential for manufacturers and R&D chemists in the fine chemical, pharmaceutical, and specialty chemical industries seeking to introduce sulfonate moieties or create water-soluble derivatives.

Application

• Dye and Pigment Intermediate: A crucial precursor in the synthesis of azo dyes and other colorants, where the sulfonic acid group enhances water solubility.
• Pharmaceutical Synthesis: Used as a building block for active pharmaceutical ingredients (APIs), particularly in creating sulfonamide drugs or molecules requiring enhanced bioavailability.
• Agrochemical Production: Employed in the manufacture of herbicides, fungicides, and plant growth regulators that benefit from the acidic and hydrophilic properties of the sulfonate group.
• Chemical Research & Development: Serves as a model compound or starting material in organic synthesis for exploring new reaction pathways.
• Surfactant and Detergent Industry: Can be utilized to synthesize specialized surfactants due to its anionic character.
• Polymer Modification: Acts as a monomer or modifying agent to introduce ionic character and improve the properties of polymers.
• Catalyst and Ligand Synthesis: Useful for preparing metal-complexing agents or acidic catalysts in various chemical processes.
• Water Treatment Chemicals: Potential use in formulating scale inhibitors or dispersants in industrial water systems.

Basic Information

Product Name	3-Hydroxy-5-Methylbenzenesulfonic Acid
CAS No.	98-20-4
Molecular Formula	C7H8O4S
Molecular Weight	188.20 g/mol
Synonyms	5-Methyl-3-hydroxybenzenesulfonic acid; 3-Hydroxy-5-methylbenzenesulfonic acid; 5-Methylresorcinolsulfonic acid; 3-Hydroxy-5-toluenesulfonic acid; 5-Methyl-1,3-benzenediol-1-sulfonic acid; m-Cresolsulfonic acid (isomer); 1-Hydroxy-3-methyl-5-sulfobenzene
EINECS	202-647-3

Quality Control

Our 3-Hydroxy-5-Methylbenzenesulfonic Acid is produced under a strict quality management system. Each batch undergoes rigorous analytical testing to ensure it meets precise specifications for identity, purity, and impurity profiles. We provide comprehensive Certificates of Analysis (COA) with each shipment, detailing key parameters such as assay, related substances, and physical characteristics. Our quality commitment ensures reliability for your critical synthesis and manufacturing processes.

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). This product is hygroscopic (moisture-sensitive) and should be kept under dry conditions to prevent caking or decomposition. 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%
Water Content (KF)	≤ 2.0%
Related Substances (HPLC)	Total impurities ≤ 2.0%
Melting Point	Contact for details
Heavy Metals	< 20 ppm

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