Description

Benzenesulfonic Acid, 3-Methyl-, Ethyl Ester is a specialized organic ester derivative of toluenesulfonic acid, valued for its role as a versatile intermediate and reagent in advanced chemical synthesis. This compound is particularly significant for introducing the ethyl benzenesulfonate moiety, which can act as an alkylating agent or a protecting group in complex molecular constructions. It serves the needs of research institutions and industrial manufacturers engaged in pharmaceutical development, agrochemical production, and the creation of specialty chemicals and dyes.

Application

• Pharmaceutical Intermediate: A key building block in the synthesis of active pharmaceutical ingredients (APIs), particularly where sulfonate ester functionalities are required.
• Agrochemical Synthesis: Used in the production of herbicides, fungicides, and other crop protection agents as a reactive intermediate.
• Chemical Research & Development: Serves as a valuable reagent in organic chemistry labs for method development and novel compound synthesis.
• Dye and Pigment Manufacturing: Acts as an intermediate in the production of sulfonated dyes and colorants.
• Polymer Modification: Can be utilized to introduce sulfonate groups into polymers to alter solubility or ionic characteristics.
• Cross-coupling Reactions: May serve as a substrate or reagent in palladium-catalyzed and other metal-mediated coupling reactions.

Basic Information

Item	Details
Product Name	Benzenesulfonic Acid, 3-Methyl-, Ethyl Ester
CAS No.	126865-08-5
Molecular Formula	C9H12O3S
Molecular Weight	200.26 g/mol
Synonyms	Ethyl 3-Methylbenzenesulfonate; 3-Methylbenzenesulfonic Acid Ethyl Ester; m-Toluenesulfonic Acid Ethyl Ester; Ethyl m-Toluenesulfonate; Ethyl 3-Toluenesulfonate; 3-Toluenesulfonic Acid Ethyl Ester; Ethyl Ester of 3-Methylbenzenesulfonic Acid
EINECS	Contact for details

Quality Control

Our Benzenesulfonic Acid, 3-Methyl-, Ethyl Ester is produced under a strict quality management system. Each batch undergoes rigorous analytical testing to ensure identity, purity, and consistency. Certificates of Analysis (COA) documenting key parameters are available upon request, providing full traceability and compliance data for your regulatory needs.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area away from incompatible materials such as strong bases. Recommended storage temperature is 2-25°C. The container should be kept tightly sealed to prevent moisture absorption.

Specification

Item	Specification
Appearance	Colorless to pale yellow liquid
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Water Content (KF)	≤ 0.5%
Related Substances (HPLC)	Total impurities ≤ 2.0%
Density (at 20°C)	~1.20 g/mL

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