Description

4'-Aminoazobenzene-4-Sulphonic Acid is an important diazo component and a key organic intermediate. This compound matters for its role in synthesizing azo dyes and pigments, offering a specific chromophore structure that contributes to color properties. It is primarily needed by manufacturers in the dyestuff, textile, and specialty chemical industries for producing colorants and as a research chemical in analytical chemistry.

Application

• Primary intermediate for the synthesis of azo dyes and pigments, particularly acid dyes.
• Key component in the production of dyes for textile fibers such as wool, silk, and nylon.
• Used in the manufacture of biological stains and histochemical reagents.
• Acts as a chromogenic agent in certain analytical and research applications.
• Intermediate for specialty chemicals used in inks and coatings.
• Potential use as a starting material for liquid crystal and other advanced material research.

Basic Information

Product Name	4'-Aminoazobenzene-4-Sulphonic Acid
CAS No.	104-23-4
Molecular Formula	C12H11N3O3S
Molecular Weight	277.30 g/mol
Synonyms	4-Aminoazobenzene-4'-sulfonic Acid; Fast Red A Salt; p-Aminoazobenzene-p'-sulfonic Acid; 4-(Phenylazo)aniline-4'-sulfonic Acid; 4'-Amino-4-sulfoazobenzene; C.I. 11160; Azobenzene-4,4'-diamine-3-sulfonic acid; 4-Sulfo-4'-aminoazobenzene
EINECS	203-185-6

Quality Control

Our 4'-Aminoazobenzene-4-Sulphonic Acid is produced under a stringent quality management system. Each batch undergoes rigorous analytical testing to ensure it meets precise chemical and physical specifications. A comprehensive Certificate of Analysis (COA) detailing purity, identity, and impurity profiles is provided with every shipment to guarantee consistency and support your quality assurance protocols.

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.

Specification

Item	Specification
Appearance	Orange to brown powder or crystalline solid
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Loss on Drying	≤ 1.0%
Sulfated Ash	≤ 0.5%
Heavy Metals (as Pb)	≤ 20 ppm
Solubility	Soluble in alkaline aqueous solutions

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