Description

4-Amino-6-[(2,5-Disulphophenyl)Azo]-3-[[2-(Ethylsulphonyl)Benzothiazol-6-Yl]Azo]-5-Hydroxynaphthalene-2,7-Disulphonic Acid, Potassium Sodium Salt is a high-purity, water-soluble anionic dye intermediate characterized by its complex polyazo and disulfonic acid structure. This compound is critically important for its ability to impart exceptional color strength, brightness, and wash-fastness in demanding applications. It is an essential raw material for manufacturers in the textile, leather, and specialty ink industries seeking to produce high-performance, vivid dyes and pigments.

Application

• Primary Intermediate for Reactive Dyes: Key building block for synthesizing high-quality reactive dyes used in cotton, wool, and nylon dyeing.
• Textile Printing Inks: Used in the formulation of inks for digital and screen printing on fabrics, offering excellent color yield.
• Leather Dyeing: Imparts deep, uniform colors to leather goods with good light and rub fastness.
• Paper Coloring: Employed in specialty paper production where high color intensity is required.
• Biological Staining: Potential use as a staining agent in histology and microscopy due to its specific chromophoric properties.
• Research & Development: Serves as a reference standard and starting material in chemical research for novel chromophores and functional dyes.

Basic Information

Item	Details
Product Name	4-Amino-6-[(2,5-Disulphophenyl)Azo]-3-[[2-(Ethylsulphonyl)Benzothiazol-6-Yl]Azo]-5-Hydroxynaphthalene-2,7-Disulphonic Acid, Potassium Sodium Salt
CAS No.	83400-05-9
Molecular Formula	C31H19KN6Na2O16S6
Molecular Weight	Contact for details
Synonyms	Reactive Black 5 (Potassium Sodium Salt); C.I. 20505; 4-Amino-5-hydroxy-3-[[2-(ethylsulfonyl)-6-benzothiazolyl]azo]-6-[(2,5-disulfophenyl)azo]-2,7-naphthalenedisulfonic acid potassium sodium salt; Potassium sodium 4-amino-6-[(2,5-disulfophenyl)azo]-3-[[2-(ethylsulfonyl)-6-benzothiazolyl]azo]-5-hydroxy-2,7-naphthalenedisulfonate; Remazol Black B; Sumifix Black B; Levafix Black EB
EINECS	Contact for details

Quality Control

Every batch of our 4-Amino-6-[(2,5-Disulphophenyl)Azo]-3-[[2-(Ethylsulphonyl)Benzothiazol-6-Yl]Azo]-5-Hydroxynaphthalene-2,7-Disulphonic Acid, Potassium Sodium Salt is manufactured and tested under a strict quality management system. We ensure compliance with industry standards for dye intermediates, with rigorous checks for purity, color strength, and impurity profiles. A comprehensive Certificate of Analysis (COA) detailing assay, identification, and specific tests is provided with each shipment to guarantee traceability and consistency.

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 performance and stability.

Specification

Item	Specification
Appearance	Dark blue to black powder or granules
Identification (IR)	Conforms to structure
Assay (HPLC)	Min. 95%
Moisture Content	Max. 5.0%
Water Solubility	Completely soluble
Heavy Metals (as Pb)	Max. 20 ppm
pH (1% Solution)	6.0 - 8.0

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