Description

5-Acetamido-3-[[4-(Anilino)Phenyl]Azo]-4-Hydroxynaphthalene-2,7-Disulphonic Acid, Sodium Salt is a high-purity, water-soluble azo dye intermediate of significant industrial importance. Its value lies in its role as a key precursor for synthesizing reactive and direct dyes, particularly those yielding vibrant and stable shades of blue and green. This compound is essential for manufacturers in the textile, leather, and specialty ink industries seeking to produce high-performance colorants.

Application

• Primary Intermediate for Reactive Dyes: A critical building block in the synthesis of fiber-reactive dyes, especially for cotton and other cellulosic fibers.
• Direct Dye Production: Used in manufacturing direct dyes that color cellulose materials without a mordant.
• Leather Coloring Agent: Employed in the formulation of dyes for the leather tanning and finishing industry.
• Specialty Ink Formulation: Serves as a colorant component in the production of inks for specialized printing applications.
• Research & Development: Utilized in chemical R&D for developing novel chromophores and studying azo dye chemistry.
• Paper Dyeing: Applied in the manufacture of dyes for coloring paper and paper products.

Basic Information

Item	Details
Product Name	5-Acetamido-3-[[4-(Anilino)Phenyl]Azo]-4-Hydroxynaphthalene-2,7-Disulphonic Acid, Sodium Salt
CAS No.	94249-04-4
Molecular Formula	C24H19N4O8S2Na
Molecular Weight	602.55 g/mol
Synonyms	5-Acetamido-3-((4-(phenylamino)phenyl)azo)-4-hydroxy-2,7-naphthalenedisulfonic acid, sodium salt; C.I. Reactive Blue 221 intermediate; Sodium 5-acetamido-3-[[4-(anilino)phenyl]azo]-4-hydroxy-2,7-naphthalenedisulfonate; 4-Hydroxy-3-[[4-(phenylamino)phenyl]azo]-5-acetamido-2,7-naphthalenedisulfonic acid, sodium salt; 94249-04-4; Azo dye intermediate RB-221; Acid Blue 221 intermediate
EINECS	Contact for details

Quality Control

Our production of 5-Acetamido-3-[[4-(Anilino)Phenyl]Azo]-4-Hydroxynaphthalene-2,7-Disulphonic Acid, Sodium Salt adheres to stringent quality management protocols. Every batch undergoes rigorous analytical testing, including HPLC for purity and identity confirmation, to ensure consistency and compliance with customer specifications. Certificates of Analysis (COA) detailing purity, impurity profile, and physical characteristics are provided with each shipment.

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 nature, the container must be kept tightly sealed to prevent moisture absorption, which can affect product stability and performance.

Specification

Item	Specification
Appearance	Dark blue to violet powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Water Content (KF)	≤ 5.0%
Solubility (1% in Water)	Complete, clear solution
Heavy Metals (as Pb)	≤ 20 ppm

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