Description

3-Ethylbenzenesulfonic Acid is a versatile organic sulfonic acid derivative, serving as a key intermediate and catalyst in advanced chemical synthesis. Its strong acidic nature and solubility in organic solvents make it a valuable reagent for electrophilic aromatic substitution and esterification reactions. This compound is essential for manufacturers in the pharmaceutical, agrochemical, and specialty chemical industries requiring precise and efficient sulfonation or acid-catalyzed processes.

Application

• Pharmaceutical Intermediate: Used in the synthesis of active pharmaceutical ingredients (APIs) and fine chemicals.
• Catalyst: Acts as an efficient acid catalyst in organic synthesis, including esterification and condensation reactions.
• Dye & Pigment Manufacturing: Serves as a sulfonating agent in the production of sulfonated dyes and colorants.
• Agrochemical Synthesis: A building block for creating herbicides, fungicides, and other crop protection agents.
• Polymer Modification: Employed in the sulfonation of polymers to alter their solubility and ionic properties.
• Research & Development: A valuable reagent in laboratory-scale organic chemistry and process development.
• Electroplating Additives: Used in the formulation of specialty baths and surface treatment solutions.
• Ion Exchange Resins: A precursor in the manufacture of certain types of ion exchange materials.

Basic Information

Product Name	3-Ethylbenzenesulfonic Acid
CAS No.	138-29-4
Molecular Formula	C8H10O3S
Molecular Weight	186.23 g/mol
Synonyms	m-Ethylbenzenesulfonic Acid; 3-Ethylbenzene-1-sulfonic Acid; Benzenesulfonic acid, 3-ethyl-; Ethylbenzenesulfonic Acid; 1-Ethyl-3-sulfobenzene; 3-Ethylphenylsulfonic Acid
EINECS	205-324-9

Quality Control

Our 3-Ethylbenzenesulfonic Acid is produced under strict quality management protocols. Every batch undergoes comprehensive analytical testing to ensure high purity and consistency, meeting the stringent requirements of industrial and research applications. A detailed Certificate of Analysis (COA) is provided with each shipment, documenting key parameters such as assay, identity, and impurity profiles.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at room temperature (15-25°C). Keep away from heat, sparks, and open flame. Due to its strong acid nature, store separately from bases, oxidizing agents, and reactive metals. Ensure containers are kept upright to prevent leakage.

Specification

Item	Specification
Appearance	Colorless to pale yellow liquid or solid
Identification (IR)	Conforms
Assay (Titration)	≥ 95.0%
Water Content (KF)	≤ 2.0%
Related Impurities (HPLC)	≤ 3.0% total

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