Description

Benzenesulfonic Acid, 2-Ethyl-4-Hydroxy- (9Ci) is a specialized organic sulfonic acid derivative, valued for its dual functionality as a strong acid and a phenolic compound. This unique structure makes it a versatile intermediate for synthesizing complex molecules where precise acidity and aromatic substitution are required. It is primarily sought by R&D chemists and process engineers in the pharmaceutical, agrochemical, and specialty chemical industries for applications in catalysis, polymer modification, and fine chemical synthesis.

Application

• Pharmaceutical Intermediate: Key building block in the synthesis of active pharmaceutical ingredients (APIs), particularly for compounds requiring sulfonate ester or phenolic functionalities.
• Catalyst & Co-Catalyst: Used as an acidic catalyst or co-catalyst in organic synthesis reactions, including esterification and polymerization processes.
• Polymer Modification: Serves as a monomer or functionalizing agent to introduce sulfonic acid groups into polymers, enhancing properties like hydrophilicity or ion-exchange capacity.
• Agrochemical Synthesis: Intermediate in the production of herbicides, fungicides, and other crop protection agents.
• Dye & Pigment Manufacturing: Used in the synthesis of sulfonated dyes and organic pigments.
• Research & Development: A valuable reagent for method development and exploratory chemistry in academic and industrial laboratories.
• Corrosion Inhibitor Formulation: Potential component in specialty formulations for metal surface treatment and protection.

Basic Information

Product Name	Benzenesulfonic Acid, 2-Ethyl-4-Hydroxy- (9Ci)
CAS No.	792861-33-7
Molecular Formula	C8H10O4S
Molecular Weight	202.23 g/mol
Synonyms	2-Ethyl-4-hydroxybenzenesulfonic acid; 4-Hydroxy-2-ethylbenzenesulfonic Acid; 2-Ethylphenol-4-sulfonic Acid; 1-Hydroxy-2-ethyl-4-sulfobenzene; (2-Ethyl-4-hydroxyphenyl)sulfonic acid
EINECS	Contact for details

Quality Control

Our Benzenesulfonic Acid, 2-Ethyl-4-Hydroxy- (9Ci) is manufactured under strict quality management systems. Each batch undergoes rigorous analytical testing, including HPLC for purity and identity confirmation, to ensure it meets precise customer specifications and internal standards. Certificates of Analysis (COA) documenting all critical quality attributes are available upon request to support your quality assurance and regulatory compliance 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 and oxidizing agents. Due to its nature as a strong acid/organic solvent, containers must be kept tightly sealed to prevent moisture absorption and contamination. Recommended storage temperature: 15-25°C.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Loss on Drying	≤ 0.5%
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.