Description

5-Formyl-2-Methylbenzenesulfonic Acid is a versatile aromatic sulfonic acid derivative that serves as a critical building block in advanced organic synthesis. Its bifunctional nature, featuring both a formyl and a sulfonic acid group, makes it a valuable precursor for creating complex molecules with tailored properties. This compound is essential for researchers and manufacturers in the pharmaceutical and specialty chemical industries, particularly for developing active pharmaceutical ingredients (APIs), dyes, and high-performance polymers.

Application

• Pharmaceutical Intermediate: A key starting material for the synthesis of novel drug candidates and active pharmaceutical ingredients (APIs), especially in therapeutic areas requiring complex sulfonated or aldehyde-functionalized scaffolds.
• Dye and Pigment Manufacturing: Used as a precursor in the production of sulfonated azo dyes and other colorants, where it contributes to water solubility and color fastness.
• Polymer Chemistry: Acts as a monomer or functionalization agent in the synthesis of specialty polymers, including ion-exchange resins and sulfonated polyaryletherketones (SPAEKs) for membrane applications.
• Chemical Research & Development: Employed in academic and industrial R&D labs as a versatile reagent for constructing heterocyclic compounds, ligands for catalysis, and other fine chemicals.
• Catalyst and Ligand Synthesis: Serves as a building block for creating sulfonated ligands used in homogeneous catalysis and metal-organic frameworks (MOFs).
• Agrochemical Intermediates: Utilized in the synthesis of certain herbicides and plant growth regulators that benefit from sulfonic acid functionality.

Basic Information

Product Name	5-Formyl-2-Methylbenzenesulfonic Acid
CAS No.	80318-84-9
Molecular Formula	C8H8O4S
Molecular Weight	200.21 g/mol
Synonyms	2-Methyl-5-formylbenzenesulfonic Acid; 6-Formyl-m-toluenesulfonic Acid; 5-Formyl-o-toluenesulfonic Acid; 2-Methyl-5-sulfobenzaldehyde; 5-Aldehydo-2-methylbenzenesulfonic Acid; 2-Methyl-5-carboxyaldehydobenzenesulfonic Acid; 5-Formyl-2-methylphenylsulfonic Acid
EINECS	Contact for details

Quality Control

Our production of 5-Formyl-2-Methylbenzenesulfonic Acid adheres to stringent quality management protocols to ensure batch-to-batch consistency and purity. Each lot is subjected to comprehensive analytical testing, including HPLC for assay and impurity profiling, IR for identification, and Karl Fischer titration for moisture content. A detailed Certificate of Analysis (COA) is provided with every shipment, documenting all critical quality attributes. We operate in compliance with cGMP principles where applicable to support our customers in regulated industries.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at a controlled room temperature (15-25°C). This compound is hygroscopic (moisture-sensitive) and should be handled in a dry environment to prevent degradation. 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% Any single impurity ≤ 1.0%
Residue on Ignition	≤ 0.1%

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