Description

Ethanesulfonic Acid is a versatile organic sulfonic acid with significant utility as a strong acid catalyst and electrolyte component. Its high acidity and stability in organic media make it a valuable reagent and intermediate for advanced chemical synthesis. This compound is essential for manufacturers and researchers in the pharmaceutical, agrochemical, and specialty chemical sectors seeking efficient and reliable sulfonation or acid-catalyzed processes.

Application

• Pharmaceutical Intermediate: Key building block in the synthesis of active pharmaceutical ingredients (APIs) and other sulfonamide-based drugs.
• Electrolyte Additive: Used in electroplating baths and as a component in certain battery electrolytes to enhance conductivity and stability.
• Chemical Synthesis Catalyst: Serves as a strong, non-oxidizing Brønsted acid catalyst in organic reactions such as esterification, alkylation, and condensation.
• Agrochemical Production: Intermediate in the manufacture of herbicides, fungicides, and other crop protection agents.
• Dye and Pigment Manufacturing: Used in the sulfonation process to produce water-soluble dyes and organic pigments.
• Polymer Modification: Employed to introduce sulfonic acid groups into polymers, modifying their properties for ion-exchange resins or specialty plastics.
• Laboratory Reagent: Utilized in research and analytical chemistry as a standard or reagent for various acid-base studies.

Basic Information

Product Name	Ethanesulfonic Acid
CAS No.	594-45-6
Molecular Formula	C2H6O3S
Molecular Weight	110.13 g/mol
Synonyms	Ethanethiolic acid, S-oxide; Ethylsulfonic acid; 1-Ethanesulfonic acid; ESA; Ethanesulphonic acid; Sulfethylic acid; NSC 3718
EINECS	209-842-2

Quality Control

Our Ethanesulfonic Acid is produced under stringent quality management systems. Each batch undergoes comprehensive analytical testing, including assay, impurity profiling, and identity confirmation, to ensure it meets the high standards required for industrial and research applications. A Certificate of Analysis (COA) detailing purity, physical properties, and test results is provided with every shipment to guarantee traceability and consistency.

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 and oxidizing agents. Due to its hygroscopic (moisture-sensitive) nature, containers should be kept tightly sealed to prevent absorption of atmospheric moisture. Recommended storage temperature is 15-25°C.

Specification

Item	Specification
Appearance	Colorless to pale yellow liquid
Identification (IR)	Conforms
Assay (HPLC)	≥ 98.0%
Water Content (KF)	≤ 1.0%
Residue on Ignition	≤ 0.1%
Heavy Metals (as Pb)	≤ 10 ppm

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