Description

4-Ethylbenzenesulfonic Acid is a versatile organic sulfonic acid derivative, valued for its strong acidity and utility as a key synthetic intermediate and catalyst. Its chemical structure makes it an effective reagent for introducing the ethylbenzenesulfonyl moiety in fine chemical synthesis and for use in specialized acid-catalyzed reactions. This compound is essential for manufacturers and R&D laboratories in the pharmaceutical, agrochemical, and specialty chemical sectors seeking reliable, high-purity building blocks.

Application

• Pharmaceutical Intermediate: Serves as a crucial building block in the synthesis of active pharmaceutical ingredients (APIs) and other drug candidates.
• Agrochemical Synthesis: Used in the production of herbicides, fungicides, and other crop protection agents.
• Catalyst & Reagent: Functions as an acid catalyst in organic synthesis and esterification reactions.
• Dye & Pigment Manufacturing: Acts as an intermediate in the production of sulfonated dyes and colorants.
• Polymer Modification: Employed in the sulfonation of polymers to alter their solubility and ionic properties.
• Research & Development: A valuable tool in academic and industrial R&D for exploring new synthetic pathways.
• Surfactant Precursor: Can be used in the synthesis of specialized surfactants and detergents.

Basic Information

Product Name	4-Ethylbenzenesulfonic Acid
CAS No.	98-69-1
Molecular Formula	C8H10O3S
Molecular Weight	186.23 g/mol
Synonyms	p-Ethylbenzenesulfonic Acid; 4-Ethylbenzene-1-sulfonic Acid; Ethylbenzenesulfonic Acid; Benzenesulfonic acid, 4-ethyl-; p-Ethylphenylsulfonic Acid; 1-Ethyl-4-sulfobenzene; (4-Ethylphenyl)sulfonic Acid
EINECS	202-693-3

Quality Control

Our 4-Ethylbenzenesulfonic Acid is manufactured under strict quality management systems. Each batch undergoes rigorous analytical testing to ensure it meets high-purity standards and consistent performance for industrial and research applications. A comprehensive Certificate of Analysis (COA) detailing purity, identity, and impurity profiles is provided with every shipment to guarantee traceability and compliance.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated place at room temperature (15-25°C). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept tightly sealed to prevent absorption of atmospheric moisture. Keep away from strong bases and incompatible materials.

Specification

Item	Specification
Appearance	White to off-white crystalline powder or solid
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Water Content (KF)	≤ 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.