Description

Benzenesulfonic Acid, 4-Amino-, Ethyl Ester is a versatile aromatic sulfonate ester derivative, serving as a key intermediate in advanced organic synthesis. Its primary value lies in its bifunctional nature, featuring both an amino group and an esterified sulfonic acid moiety, which makes it a valuable precursor for dyes, pigments, and pharmaceutical actives. This compound is essential for manufacturers and R&D laboratories in the fine chemical, agrochemical, and specialty dye industries seeking to develop or produce complex sulfonated molecules.

Application

• Dye and Pigment Intermediate: A crucial building block for synthesizing azo dyes, acid dyes, and other colorants requiring sulfonic acid functionality.
• Pharmaceutical Synthesis: Used as a key intermediate in the production of certain sulfonamide-based drugs and other active pharmaceutical ingredients (APIs).
• Agrochemical Manufacturing: Employed in the synthesis of herbicides, fungicides, and other crop protection agents that incorporate sulfonate ester groups.
• Polymer Modification: Acts as a monomer or functionalizing agent for creating specialty polymers with ionic or hydrophilic properties.
• Chemical Research (R&D): Serves as a standard or reagent in organic chemistry research for studying sulfonation reactions and synthesizing novel compounds.
• Photographic Chemicals: Can be utilized in the synthesis of certain chemicals used in photographic development processes.

Basic Information

Product Name	Benzenesulfonic Acid, 4-Amino-, Ethyl Ester
CAS No.	90090-38-3
Molecular Formula	C8H11NO3S
Molecular Weight	201.24 g/mol
Synonyms	4-Aminoethyl benzenesulfonate; Ethyl 4-aminobenzenesulfonate; p-Aminoethyl benzenesulfonate; 4-Aminobenzenesulfonic acid ethyl ester; Benzenesulfonic acid, p-amino-, ethyl ester; Ethyl p-aminobenzenesulfonate; AES; Contact for EINECS details.

Quality Control

Our production of Benzenesulfonic Acid, 4-Amino-, Ethyl Ester adheres to stringent quality management protocols to ensure batch-to-batch consistency and high purity. Each lot is analyzed against comprehensive specifications using advanced techniques like HPLC, GC, and NMR. A Certificate of Analysis (COA) detailing identity, purity, and impurity profiles is provided with every shipment to support your quality assurance and regulatory compliance needs.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area away from incompatible materials such as strong acids, strong bases, and oxidizing agents. Recommended storage temperature is 2-25°C. The compound is light-sensitive and should be stored away from direct light exposure.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Melting Point	Contact for details
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.