Description

4-hydroxy-7-[[[[5-hydroxy-6-[(o-tolyl)azo]-7-sulpho-2-naphthyl]amino]carbonyl]amino]-3-[(6-sulpho-2-naphthyl)azo]naphthalene-2-sulphonic acid, potassium sodium salt is a high-purity, water-soluble azo dye intermediate of significant industrial importance. Its complex polyfunctional structure provides excellent chromophoric properties and binding affinity, making it a critical precursor for synthesizing high-performance dyes and pigments. This compound is essential for manufacturers in the textile, ink, and specialty coatings industries seeking to produce vivid, stable colors with specific technical characteristics.

Application

• Primary Intermediate for Reactive Dyes: Key building block for synthesizing high-quality reactive dyes used in cotton and cellulose fiber dyeing.
• Pigment Manufacturing: Used in the production of high-performance organic pigments for inks, plastics, and coatings.
• Textile Printing: Serves as a crucial component in formulations for textile printing pastes, ensuring color fastness and brightness.
• Specialty Ink Production: Employed in manufacturing inks for digital textile printing and other advanced printing technologies.
• Research & Development: Used in chemical R&D for developing new chromophores and studying azo dye chemistry and properties.
• Analytical Chemistry: Can be utilized as a standard or reagent in analytical methods for dye identification and quantification.

Basic Information

Item	Details
Product Name	4-hydroxy-7-[[[[5-hydroxy-6-[(o-tolyl)azo]-7-sulpho-2-naphthyl]amino]carbonyl]amino]-3-[(6-sulpho-2-naphthyl)azo]naphthalene-2-sulphonic acid, potassium sodium salt
CAS No.	83232-37-5
Molecular Formula	C39H24KN6NaO13S3
Molecular Weight	Contact for details
Synonyms	Reactive Black 5 precursor; Potassium sodium salt of a disazo dye intermediate; CI 20505 intermediate; 4-Hydroxy-3-[(6-sulfo-2-naphthalenyl)azo]-7-[[[[5-hydroxy-6-[(2-methylphenyl)azo]-7-sulfo-2-naphthalenyl]amino]carbonyl]amino]-2-naphthalenesulfonic acid potassium sodium salt; Azo dye derivative KN salt; Textile dye intermediate 83232-37-5; Disulfonated disazo dye intermediate
EINECS	Contact for details

Quality Control

Our production of this advanced dye intermediate adheres to stringent quality control protocols to ensure batch-to-batch consistency and high purity. The material is characterized using advanced analytical techniques including HPLC and spectrophotometry. A comprehensive Certificate of Analysis (COA) detailing purity, identity, and impurity profiles is provided with each shipment to support your quality assurance and regulatory needs.

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. Keep away from incompatible materials.

Specification

Item	Specification
Appearance	Dark powder or granules
Identification (IR)	Conforms to structure
Assay (HPLC)	Min. 95%
Moisture Content	Max. 5.0%
Solubility (Water)	Completely soluble
Heavy Metals	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.