Description

4-Amino-6-[(2,5-Disulfophenyl)Azo]-3-[[2-(Ethylsulfonyl)Benzothiazol-6-Yl]Azo]-5-Hydroxy-2,7-Naphthalenedisulfonic Acid Tetrasodium Salt is a high-purity, water-soluble azo dye intermediate of significant commercial importance. Its complex polyfunctional structure makes it a critical precursor for synthesizing specialized dyes and pigments with enhanced color fastness and solubility properties. This compound is essential for manufacturers in the textile, ink, and specialty chemical industries seeking to produce high-performance colorants.

Application

• Primary Intermediate for Reactive Dyes: Key building block for manufacturing high-grade reactive dyes used in cotton and cellulose fiber dyeing.
• Specialty Pigment Synthesis: Used in the production of complex organic pigments for inks, coatings, and plastics requiring specific hue and stability.
• Textile Colorant Formulation: Provides the chromophore structure for dyes demanding excellent wash and light fastness in the textile industry.
• Functional Dye Production: Serves as a precursor for dyes used in technical applications, including laser marking and optical data storage.
• Research & Development: Utilized in chemical R&D for developing novel chromophores and studying azo dye chemistry and properties.
• Analytical Chemistry: May be employed as a staining agent or complexometric indicator in specific analytical procedures.

Basic Information

Item	Detail
Product Name	4-Amino-6-[(2,5-Disulfophenyl)Azo]-3-[[2-(Ethylsulfonyl)Benzothiazol-6-Yl]Azo]-5-Hydroxy-2,7-Naphthalenedisulfonic Acid Tetrasodium Salt
CAS No.	72828-71-8
Molecular Formula	C31H19N6Na4O16S6
Molecular Weight	Contact for details
Synonyms	Acid Black 210; C.I. 300310; Tetrasodium 4-amino-6-[(2,5-disulfophenyl)azo]-3-[[2-(ethylsulfonyl)-1,3-benzothiazol-6-yl]azo]-5-hydroxy-2,7-naphthalenedisulfonate; Reactive Black 5 related intermediate; Azo dye intermediate 72828-71-8; 2,7-Naphthalenedisulfonic acid, 4-amino-6-[(2,5-disulfophenyl)azo]-3-[[2-(ethylsulfonyl)-6-benzothiazolyl]azo]-5-hydroxy-, tetrasodium salt
EINECS	Contact for details

Quality Control

Our 4-Amino-6-[(2,5-Disulfophenyl)Azo]-3-[[2-(Ethylsulfonyl)Benzothiazol-6-Yl]Azo]-5-Hydroxy-2,7-Naphthalenedisulfonic Acid Tetrasodium Salt is produced under a strict quality management system. Every batch undergoes comprehensive analytical testing to ensure consistent purity, identity, and performance. A detailed Certificate of Analysis (COA) documenting key parameters such as assay, impurity profile, and physical properties is provided to guarantee it meets your specific application requirements.

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	Dark powder or solid
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 5.0%
Water Solubility	Freely soluble
Heavy Metals (as Pb)	≤ 20 ppm

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