Description

2,7-Naphthalenedisulfonic acid, 4-amino-5-hydroxy-, diazotized, coupled with diazotized 2-[(4-aminophenyl)amino]-5-nitrobenzenesulfonic acid, diazotized 4-nitrobenzenamine, 4-methyl-1,3-benzenediamine and resorcinol, potassium sodium salts is a complex, high-purity azo dye intermediate essential for producing vibrant and stable colorants. This compound matters for its role in synthesizing specialized dyes with excellent lightfastness and wash-fastness properties for demanding applications. It is primarily needed by manufacturers in the textile, leather, ink, and specialty pigments industries seeking consistent, high-performance raw materials.

Application

• Primary Intermediate for Azo Dyes: Key building block for synthesizing high-value, polyazo direct dyes and acid dyes.
• Textile Dyeing: Used in the production of dyes for coloring cotton, wool, silk, and nylon fibers.
• Leather Coloring: Essential for manufacturing dyes applied in the leather tanning and finishing industry.
• Ink Formulation: Serves as a precursor for pigments used in printing inks, including packaging and security inks.
• Specialty Pigments: Employed in the creation of pigments for plastics, coatings, and artistic paints.
• Paper Dyeing: Used in the production of dyes for high-grade paper and paperboard.
• Biological Staining: Potential use as an intermediate for histological stains and indicators in laboratory settings.

Basic Information

Product Name	2,7-Naphthalenedisulfonic acid, 4-amino-5-hydroxy-, diazotized, coupled with diazotized 2-[(4-aminophenyl)amino]-5-nitrobenzenesulfonic acid, diazotized 4-nitrobenzenamine, 4-methyl-1,3-benzenediamine and resorcinol, potassium sodium salts
CAS No.	90432-01-2
Molecular Formula	Contact for details
Molecular Weight	Contact for details
Synonyms	C.I. Direct Brown 1:1; Direct Brown 1:1; Direct Brown 1:1, potassium sodium salt; 90432-01-2; Polyazo dye intermediate; Azo dye coupling component; Potassium sodium salt of a polyazo dye
EINECS	Contact for details

Quality Control

Our production of this advanced dye intermediate adheres to strict quality management systems, ensuring batch-to-batch consistency for critical applications. Quality is verified through comprehensive analytical testing, including HPLC for purity and impurity profiling and spectroscopic identification (IR, UV-Vis). A detailed Certificate of Analysis (COA) documenting identity, purity, and relevant physical parameters is provided with every 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 (moisture-sensitive) nature, the container must be kept tightly sealed after opening to prevent moisture absorption and degradation. Keep away from incompatible materials such as strong oxidizing agents.

Specification

Item	Specification
Appearance	Dark brown to black powder or granules
Identification (IR)	Conforms to reference spectrum
Assay (HPLC)	Min. 95%
Moisture (KF)	Max. 5.0%
Ash Content	Contact for details
Heavy Metals (as Pb)	Max. 20 ppm
Solubility (in Water)	Freely soluble

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