Description

7-(Acetylamino)-3-[[4-(Acetylamino)Phenyl]Azo]-4-Hydroxynaphthalene-2-Sulphonic Acid is a specialized azo dye intermediate of significant commercial importance. This compound is valued for its role in synthesizing high-performance dyes and pigments with excellent color fastness and specific functional properties. It is primarily sought by manufacturers in the textile, ink, and specialty chemical industries for producing vibrant and durable colorants.

Application

• Primary Intermediate for Azo Dyes: A key building block in the synthesis of acid dyes and direct dyes used for coloring nylon, wool, silk, and paper.
• Textile Industry: Used in the production of dyes that offer good wash and light fastness on protein-based and synthetic polyamide fibers.
• Ink Manufacturing: Serves as a precursor for pigments and dyes in inks for packaging, printing, and writing instruments.
• Specialty Pigments: Employed in the creation of pigments for coatings, plastics, and other industrial applications requiring specific color shades.
• Research & Development: Utilized in chemical research for developing novel chromophores and studying structure-property relationships in dye chemistry.
• Biological Staining: Potential use as an intermediate for synthesizing stains used in histological and microbiological applications.

Basic Information

Product Name	7-(Acetylamino)-3-[[4-(Acetylamino)Phenyl]Azo]-4-Hydroxynaphthalene-2-Sulphonic Acid
CAS No.	25317-48-0
Molecular Formula	C20H18N4O6S
Molecular Weight	442.45 g/mol
Synonyms	Acid Orange 156; C.I. 26410; 7-Acetamido-3-[(4-acetamidophenyl)azo]-4-hydroxy-2-naphthalenesulfonic acid; 4-Hydroxy-3-[(4-acetamidophenyl)azo]-7-acetamido-2-naphthalenesulfonic acid; 2-Naphthalenesulfonic acid, 7-(acetylamino)-3-[[4-(acetylamino)phenyl]azo]-4-hydroxy-; Azo dye intermediate 25317-48-0; 7-Acetylamino-3-(4-acetylamino-phenylazo)-4-hydroxy-naphthalene-2-sulfonic acid
EINECS	Contact for details

Quality Control

Our production of 7-(Acetylamino)-3-[[4-(Acetylamino)Phenyl]Azo]-4-Hydroxynaphthalene-2-Sulphonic Acid adheres to stringent quality protocols to ensure batch-to-batch consistency and purity. Each lot is analyzed using advanced techniques like HPLC and spectrophotometry to verify identity, strength, and impurity profiles. Certificates of Analysis (COA) detailing all relevant specifications are provided with every shipment to support your quality assurance processes.

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). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept sealed to prevent absorption of atmospheric moisture. Keep away from incompatible materials.

Specification

Item	Specification
Appearance	Brown to reddish-brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 5.0%
Sulfated Ash	≤ 1.0%
Heavy Metals (as Pb)	≤ 20 ppm
Related Substances (HPLC)	Total impurities ≤ 3.0%

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