Description

2-(4-Aminoanilino)-5-Nitrobenzenesulphonic Acid is a key aromatic amine and sulfonic acid derivative used as a versatile chemical intermediate. Its molecular structure makes it valuable for synthesizing complex dyes, pigments, and other functional organic compounds. This product is essential for manufacturers in the dye and pigment, specialty chemical, and pharmaceutical research industries seeking high-purity building blocks.

Application

• Primary intermediate in the synthesis of azo dyes and pigments, particularly for textile and leather coloring.
• Key building block for the production of sulphonated azo dyes, which offer excellent water solubility and fiber affinity.
• Used in research and development for creating novel functional dyes with specific optical or electronic properties.
• Intermediate in the manufacture of organic pigments for inks, coatings, and plastics.
• Potential precursor in pharmaceutical research for synthesizing sulfonamide-containing compounds.
• Starting material for specialty chemicals used in analytical reagents and photographic chemicals.

Basic Information

Product Name	2-(4-Aminoanilino)-5-Nitrobenzenesulphonic Acid
CAS No.	91-29-2
Molecular Formula	C12H11N3O5S
Molecular Weight	309.30 g/mol
Synonyms	4-Nitro-4'-aminodiphenylamine-2-sulfonic Acid; 5-Nitro-2-(p-phenylenediamino)benzenesulfonic Acid; 2-(4-Aminoanilino)-5-nitrobenzenesulfonic Acid; C.I. 37240; 1-Amino-4-(4-aminoanilino)-5-nitrobenzene-2-sulfonic acid; 4-Nitro-4'-aminodiphenylamine-2-sulphonic Acid; 2-(4-Aminophenylamino)-5-nitrobenzenesulfonic acid
EINECS	202-058-8

Quality Control

Our production of 2-(4-Aminoanilino)-5-Nitrobenzenesulphonic Acid adheres to stringent quality management protocols to ensure batch-to-batch consistency and high purity. The material is characterized and tested against established internal specifications. A comprehensive Certificate of Analysis (COA) detailing purity, identity, and impurity profiles is provided with each shipment to support your quality assurance processes.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, 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 degradation from atmospheric moisture.

Specification

Item	Specification
Appearance	Yellow to brownish powder or crystalline solid
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 2.0%
Sulfated Ash	≤ 0.5%

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