Description

4-(4-Aminoanilino)-3-Nitrobenzenesulphonic Acid is a specialized aromatic sulfonic acid derivative that serves as a critical intermediate in advanced organic synthesis. Its unique structure, featuring both amino and nitro functional groups on a benzenesulfonic acid backbone, makes it a valuable precursor for creating complex molecules. This compound is primarily sought by manufacturers in the dye and pigment, pharmaceutical, and agrochemical industries for the development of high-performance products.

Application

• Dye and Pigment Intermediate: A key building block in the synthesis of azo dyes, acid dyes, and other complex colorants, particularly for textiles and inks.
• Pharmaceutical Synthesis: Used as a versatile intermediate in the research and production of active pharmaceutical ingredients (APIs) and other fine chemicals.
• Agrochemical Manufacturing: Employed in the synthesis of certain herbicides, pesticides, and plant growth regulators.
• Chemical Research & Development: Serves as a valuable reagent in organic chemistry labs for constructing novel molecular architectures.
• Polymer Additive Precursor: Can be utilized to synthesize functional monomers or additives that impart specific properties to polymers.
• Photographic Chemical: Finds application in the production of certain specialty chemicals for photographic and imaging processes.

Basic Information

Product Name	4-(4-Aminoanilino)-3-Nitrobenzenesulphonic Acid
CAS No.	135-11-5
Molecular Formula	C12H11N3O5S
Molecular Weight	309.30 g/mol
Synonyms	4-(4-Aminoanilino)-3-nitrobenzenesulfonic acid; 3-Nitro-4-(p-phenylenediamino)benzenesulfonic acid; 4-Amino-4'-(3-nitro-4-sulfophenyl)azobenzene intermediate; 1-Amino-4-[(2-nitro-4-sulfophenyl)amino]benzene; C.I. 37230; Acid Yellow 36 intermediate; p-Aminoazobenzene-2'-sulfonic acid derivative; 4-[(4-Aminophenyl)amino]-3-nitrobenzenesulfonic acid
EINECS	205-179-7

Quality Control

Our production of 4-(4-Aminoanilino)-3-Nitrobenzenesulphonic Acid adheres to stringent quality management protocols to ensure batch-to-batch consistency and reliability. Each lot undergoes comprehensive analytical testing, including HPLC for purity and identity confirmation. A Certificate of Analysis (COA) detailing all specifications is provided with every shipment, and we support customer audits and quality agreements to meet specific regulatory or application needs.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at room temperature (15-25°C). Keep away from strong oxidizing agents and incompatible materials. The compound may be hygroscopic; ensure containers are sealed after use to minimize moisture absorption.

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%
Sulfated Ash	≤ 0.5%
Heavy Metals (as Pb)	≤ 20 ppm
Related Substances (HPLC)	Total impurities ≤ 2.0%

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