Description

[(2-Methyl-4-Nitrophenyl)Amino]Benzenesulphonic Acid CAS NO 71735-26-7 is a specialized organic intermediate featuring a sulfonic acid group and a nitro-substituted aniline moiety. This compound matters for its role as a key building block in the synthesis of complex dyes, pigments, and functional materials, where its specific structure imparts valuable chromophoric and chemical properties. It is primarily needed by manufacturers in the fine chemical, dye and pigment, and advanced material research sectors.

Application

• Primary intermediate in the synthesis of azo dyes and pigments for textiles, inks, and plastics.
• Key precursor for the development of functional dyes used in specialized optical applications.
• Building block in organic synthesis for pharmaceutical research and active pharmaceutical ingredient (API) development.
• Intermediate in the production of liquid crystal dyes and other advanced electronic materials.
• Used in research and development of corrosion inhibitors and metal-complexing agents.
• Starting material for analytical reagent synthesis and chemical standards.

Basic Information

Product Name	[(2-Methyl-4-Nitrophenyl)Amino]Benzenesulphonic Acid
CAS No.	71735-26-7
Molecular Formula	C13H12N2O5S
Molecular Weight	308.31 g/mol
Synonyms	Benzenesulfonic acid, [(2-methyl-4-nitrophenyl)amino]-; 2-Methyl-4-nitroanilinobenzene-4'-sulfonic acid; 4-[(2-Methyl-4-nitrophenyl)amino]benzenesulfonic acid; 2'-Methyl-4'-nitrodiphenylamine-4-sulfonic acid; 4-Amino-3-methyl-4'-nitrodiphenyl sulfone (related structure); N-(2-Methyl-4-nitrophenyl)-4-aminobenzenesulfonic acid; 4-[(2-Methyl-4-nitrophenyl)amino]benzenesulphonic acid
EINECS	Contact for details

Quality Control

Our production of [(2-Methyl-4-Nitrophenyl)Amino]Benzenesulphonic Acid adheres to stringent quality management protocols. Every batch undergoes rigorous analytical testing to ensure high purity and consistent performance. Certificates of Analysis (COA) detailing identity, purity, and impurity profiles are available upon request to support your quality assurance and regulatory needs.

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 after opening to prevent degradation from atmospheric moisture.

Specification

Item	Specification
Appearance	Yellow to brownish powder or crystalline solid
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Loss on Drying	≤ 2.0%
Residue on Ignition (Sulfated Ash)	≤ 0.5%
Heavy Metals (as Pb)	≤ 20 ppm
Related Substances (HPLC)	Individual impurity ≤ 0.5%; Total impurities ≤ 2.0%

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