Description

4-[[4-(Anilino)Phenyl]Azo]Benzenesulphonic Acid is an important azo dye intermediate and functional chemical compound. Its value lies in its role as a versatile precursor for synthesizing a range of dyes, pigments, and specialty colorants with specific performance characteristics. This product is essential for manufacturers in the dyestuff, textile, ink, and specialty chemical industries seeking to develop custom color formulations or advanced materials.

Application

• Primary Intermediate for Azo Dyes & Pigments: Serves as a key building block in the synthesis of various yellow, orange, and red azo colorants.
• Textile Dye Manufacturing: Used in the production of dyes for coloring natural and synthetic fibers, including cotton, wool, and polyamide.
• Ink & Toner Formulation: Employed in the creation of colorants for printing inks, including packaging and publication inks, and electrophotographic toners.
• Specialty Chemical Synthesis: Acts as a functional intermediate in the manufacture of complex organic molecules for research and advanced material applications.
• Laboratory & Research Reagent: Utilized in chemical research and development for studying azo coupling reactions and dye chemistry.

Basic Information

Product Name	4-[[4-(Anilino)Phenyl]Azo]Benzenesulphonic Acid
CAS No.	17040-79-8
Molecular Formula	C18H15N3O3S
Molecular Weight	353.40 g/mol
Synonyms	4-[(4-Anilinophenyl)azo]benzenesulfonic acid; Benzenesulfonic acid, 4-[[4-(phenylamino)phenyl]azo]-; C.I. 18050; Acid Yellow 36 (unsulfonated component); 4-[(4-Aminodiphenyl-4-yl)azo]benzenesulfonic acid; p-[(p-Anilinophenyl)azo]benzenesulfonic acid; 4-[(4-Phenylaminophenyl)azo]benzenesulfonic acid
EINECS	241-110-8

Quality Control

Our production of 4-[[4-(Anilino)Phenyl]Azo]Benzenesulphonic Acid adheres to stringent quality management protocols. Every batch undergoes comprehensive analytical testing to ensure identity, purity, and consistency meet the high standards required for industrial synthesis. A Certificate of Analysis (COA) detailing specific results for assay, impurity profile, and physical characteristics is provided with each shipment and is available upon request.

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)	≥ 95.0%
Loss on Drying	≤ 2.0%
Sulfated Ash	≤ 0.5%
Heavy Metals (as Pb)	≤ 20 ppm

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