Description

6-Amino-5-[(4-Anilinosulfonylphenyl)Azo]-4-Hydroxynaphthalene-2-Sulphonic Acid is a specialized azo dye intermediate characterized by its complex aromatic structure containing sulfonic acid and amino functional groups. This compound matters as a critical precursor for synthesizing high-value, colorfast dyes and pigments, offering precise color properties and stability in demanding formulations. It is essential for manufacturers in the textile, ink, and specialty chemical industries who require consistent, high-purity intermediates for producing vibrant and durable colors.

Application

• Primary intermediate for the synthesis of azo dyes and pigments used in textile coloring.
• Key component in manufacturing specialty inks for packaging and security printing applications.
• Used in the production of colorants for plastics and polymers to achieve specific hue and lightfastness properties.
• Precursor for biological stains and histochemical dyes used in laboratory diagnostics and research.
• Intermediate in the development of functional dyes for applications in electronics and optical data storage.
• Used in research and development for novel photographic and imaging chemicals.

Basic Information

Product Name	6-Amino-5-[(4-Anilinosulfonylphenyl)Azo]-4-Hydroxynaphthalene-2-Sulphonic Acid
CAS No.	64863-81-6
Molecular Formula	C22H17N5O6S2
Molecular Weight	511.53 g/mol
Synonyms	6-Amino-5-[(4-(phenylamino)sulfonyl)phenyl]azo]-4-hydroxy-2-naphthalenesulfonic acid; 6-Amino-4-hydroxy-5-[[4-[(phenylamino)sulfonyl]phenyl]azo]-2-naphthalenesulfonic acid; Acid Red 337; C.I. 17200; Azo dye intermediate 64863-81-6; 5-[(4-Anilinosulfonylphenyl)azo]-6-amino-4-hydroxy-2-naphthalenesulfonic acid; 4-Hydroxy-6-amino-5-[(4-anilinosulfonylphenyl)azo]-2-naphthalenesulfonic acid
EINECS	Contact for details

Quality Control

Our production of 6-Amino-5-[(4-Anilinosulfonylphenyl)Azo]-4-Hydroxynaphthalene-2-Sulphonic Acid adheres to stringent quality protocols to ensure batch-to-batch consistency and high purity. Each lot is analyzed using advanced techniques like HPLC and spectrophotometry to verify identity, potency, and impurity profiles. Certificates of Analysis (COA) detailing all specifications are provided to guarantee compliance with your technical and research-grade requirements.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at a controlled room temperature (15-25°C). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept sealed when not in use to prevent degradation from atmospheric moisture.

Specification

Item	Specification
Appearance	Dark 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.