Description

Benzenemethanesulfonic Acid, 4-Ethyl- (9Ci) is a specialized organic sulfonic acid derivative, valued for its role as a versatile building block and catalyst in advanced chemical synthesis. Its strong acidic nature and specific aromatic substitution pattern make it a critical intermediate for creating high-value compounds. This product is essential for research and development chemists, as well as production teams in the pharmaceutical, agrochemical, and specialty chemical industries seeking reliable, high-purity intermediates.

Application

• Pharmaceutical Intermediate: A key building block in the synthesis of active pharmaceutical ingredients (APIs), particularly for molecules requiring a sulfonic acid or sulfonate ester functional group.
• Agrochemical Synthesis: Used in the production of herbicides, fungicides, and plant growth regulators where its aromatic sulfonic acid structure contributes to biological activity.
• Catalyst & Reagent: Functions as an efficient acid catalyst in organic reactions, including esterification, alkylation, and condensation processes.
• Dye & Pigment Manufacturing: Serves as an intermediate in the synthesis of sulfonated dyes and pigments, enhancing solubility and color fastness.
• Polymer Modification: Employed to introduce sulfonic acid groups into polymers, modifying properties like hydrophilicity and ion-exchange capacity.
• Research & Development: A valuable compound for method development and exploratory synthesis in academic and industrial R&D laboratories.

Basic Information

Product Name	Benzenemethanesulfonic Acid, 4-Ethyl- (9Ci)
CAS No.	752148-79-1
Molecular Formula	C9H12O3S
Molecular Weight	200.26 g/mol
Synonyms	4-Ethylbenzenemethanesulfonic Acid; p-Ethylbenzylsulfonic Acid; (4-Ethylphenyl)methanesulfonic Acid; 4-Ethylbenzylsulfonic Acid; 4-Ethyl-α-toluenesulfonic Acid; 1-(Ethyl)-4-(methylsulfonyl)benzene; Benzenemethanesulfonic acid, 4-ethyl-
EINECS	Contact for details

Quality Control

Our Benzenemethanesulfonic Acid, 4-Ethyl- (9Ci) is produced under stringent quality management systems. Each batch undergoes rigorous analytical testing to ensure high purity and consistency, meeting the exacting standards required for synthetic applications. A comprehensive Certificate of Analysis (COA) detailing identity, purity, and impurity profiles is provided with every shipment to guarantee traceability and support your quality assurance protocols.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at room temperature (15-25°C). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept tightly sealed after opening to prevent absorption of atmospheric moisture. 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)	≤ 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.