Description

Benzenesulfonic Acid, 4-Amino-, Methyl Ester is an important aromatic sulfonate ester derivative, serving as a versatile intermediate in fine chemical synthesis. Its value lies in its functional groups, which make it a key building block for creating more complex molecules with specific properties. This compound is primarily needed by manufacturers in the pharmaceutical, agrochemical, and dye industries for research, development, and production processes.

Application

• Pharmaceutical Intermediate: Used in the synthesis of active pharmaceutical ingredients (APIs), particularly those requiring a sulfonamide or sulfonate ester moiety.
• Agrochemical Synthesis: Serves as a precursor in the manufacture of herbicides, fungicides, and other crop protection agents.
• Dye and Pigment Manufacturing: Acts as a key intermediate for producing azo dyes and other colorants, leveraging the amino group for diazotization.
• Chemical Research & Development: Employed as a standard or building block in organic synthesis and material science research.
• Polymer Modification: Can be used to introduce sulfonate groups into polymers to alter solubility or ionic characteristics.

Basic Information

Product Name	Benzenesulfonic Acid, 4-Amino-, Methyl Ester
CAS No.	55034-26-9
Molecular Formula	C7H9NO3S
Molecular Weight	187.22 g/mol
Synonyms	4-Aminobenzenesulfonic Acid Methyl Ester; Methyl 4-Aminobenzenesulfonate; p-Aminophenyl Methyl Sulfonate; Methyl p-Aminobenzenesulfonate; 4-Amino-1-methylbenzenesulfonate; Benzenesulfonic acid, 4-amino-, methyl ester; Methyl 4-aminobenzene-1-sulfonate
EINECS	Contact for details

Quality Control

Our Benzenesulfonic Acid, 4-Amino-, Methyl Ester is produced under a strict quality management system. Each batch undergoes rigorous analytical testing to ensure identity, purity, and consistency meet high standards. A comprehensive Certificate of Analysis (COA) detailing purity, assay, and impurity profiles is provided with every shipment and is available upon request.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at room temperature (15-25°C). This product is hygroscopic (moisture-sensitive); keep the container tightly sealed to minimize exposure to atmospheric humidity.

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	≤ 1.0%
Related Substances (HPLC)	Contact for details

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