Description

2,7-Naphthalenedisulfonic acid, 4-amino-5-hydroxy-, coupled with diazotized 3,3'-dimethoxy[1,1'-biphenyl]-4,4-diamine and 5,5'-[oxybis[(5-hydroxy-3,1-phenylene)oxy]]bis[1,3-benzenediol], sodium salts is a high-performance, complex synthetic dye intermediate. This compound is engineered to deliver exceptional color strength and stability in demanding applications. It is primarily required by manufacturers in the textile, specialty ink, and high-grade paper industries seeking advanced coloring solutions.

Application

• Dye Synthesis: A key intermediate for producing high-value, complex azo dyes and pigments.
• Textile Coloration: Used in dyeing processes for synthetic and natural fibers requiring deep, fast colors.
• Specialty Inks: Formulation component for high-performance inks used in packaging, security printing, and digital applications.
• Paper Dyeing: Provides vibrant and stable coloration for high-quality paper products.
• Leather Finishing: Employed in dyeing leather to achieve consistent and durable finishes.
• Research & Development: Serves as a critical reagent in chemical research for developing new chromophores and functional materials.

Basic Information

Product Name	2,7-Naphthalenedisulfonic acid, 4-amino-5-hydroxy-, coupled with diazotized 3,3'-dimethoxy[1,1'-biphenyl]-4,4-diamine and 5,5'-[oxybis[(5-hydroxy-3,1-phenylene)oxy]]bis[1,3-benzenediol], sodium salts
CAS No.	98073-03-1
Molecular Formula	Contact for details
Molecular Weight	Contact for details
Synonyms	C.I. Direct Brown 209; Direct Brown 209; Sodium 4-amino-5-hydroxy-2,7-naphthalenedisulfonate coupled diazo component; Diazotized 3,3'-dimethoxybenzidine coupled derivative; Complex Azo Dye Intermediate; 98073-03-1; C.I. 209
EINECS	Contact for details

Quality Control

Our production of this dye intermediate adheres to stringent quality control protocols to ensure batch-to-batch consistency and performance reliability. Each lot is analyzed against established specifications for critical parameters such as purity, color value, and impurity profile. A comprehensive Certificate of Analysis (COA) is provided with every shipment to guarantee compliance with your technical 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). This material is light-sensitive (store away from light) and hygroscopic (moisture-sensitive); ensure containers are kept sealed to prevent moisture absorption and degradation.

Specification

Item	Specification
Appearance	Dark brown to black powder or solid
Identification (IR)	Conforms to structure
Assay (HPLC)	Min. 90%
Moisture Content	Max. 5.0%
Ash Content	Max. 20.0%
Water Solubility	Freely soluble

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