Description

Disodium 8-[[3,3'-Dimethoxy-4'-[[4-[[(p-Tolyl)Sulphonyl]Oxy]Phenyl]Azo][1,1'-Biphenyl]-4-Yl]Azo]-7-Hydroxynaphthalene-1,3-Disulphonate is a high-purity, synthetic azo dye intermediate characterized by its complex disulfonated naphthalene structure. This compound is engineered for precise color development and is valued for its excellent solubility and chromophoric properties in demanding formulations. It serves as a critical precursor for manufacturers in the textile, ink, and specialty coatings industries who require consistent, high-performance pigments.

Application

• Textile Dyeing: A key intermediate for synthesizing high-grade, wash-fast azo dyes for cotton, wool, and synthetic fibers.
• Inkjet Inks: Used in the production of specialized colorants for industrial and graphic arts inks, offering vibrant color and stability.
• Pigment Manufacturing: Acts as a crucial building block for creating organic pigments used in plastics, paints, and coatings.
• Paper Coloring: Employed in the formulation of dyes for high-quality paper and specialty packaging materials.
• Leather Finishing: Utilized in dye systems for achieving deep, uniform colors on leather goods.
• Research & Development: Serves as a standard or experimental compound in chemical research for new colorant technologies.

Basic Information

Product Name	Disodium 8-[[3,3'-Dimethoxy-4'-[[4-[[(p-Tolyl)Sulphonyl]Oxy]Phenyl]Azo][1,1'-Biphenyl]-4-Yl]Azo]-7-Hydroxynaphthalene-1,3-Disulphonate
CAS No.	6548-30-7
Molecular Formula	C43H30N4Na2O12S3
Molecular Weight	960.87 g/mol
Synonyms	Disodium 1,3-disulfo-8-[[3,3'-dimethoxy-4'-[[4-[[(4-methylphenyl)sulfonyl]oxy]phenyl]azo][1,1'-biphenyl]-4-yl]azo]-7-hydroxynaphthalene; C.I. Direct Yellow 28; Direct Fast Yellow GC; Direct Yellow GC; Direct Yellow 5G; Amanil Fast Yellow GC; Azo dye intermediate 6548-30-7; 7-Hydroxy-8-[[4'-[4-[[(4-methylphenyl)sulfonyl]oxy]phenyl]azo]-3,3'-dimethoxy[1,1'-biphenyl]-4-yl]azo]-1,3-naphthalenedisulfonic acid disodium salt
EINECS	229-476-2

Quality Control

Our production of Disodium 8-[[3,3'-Dimethoxy-4'-[[4-[[(p-Tolyl)Sulphonyl]Oxy]Phenyl]Azo][1,1'-Biphenyl]-4-Yl]Azo]-7-Hydroxynaphthalene-1,3-Disulphonate adheres to a stringent quality management system. Every batch undergoes rigorous analytical testing to ensure high purity, consistent chroma value, and batch-to-batch reproducibility. Comprehensive Certificates of Analysis (COA) detailing identity, assay, and impurity profiles are provided to guarantee compliance with your technical specifications.

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 product is hygroscopic (moisture-sensitive); keep the container tightly sealed to prevent absorption of atmospheric moisture.

Specification

Item	Specification
Appearance	Reddish-brown to dark brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Moisture Content	≤ 5.0%
Sulfated Ash	≤ 20.0%
Heavy Metals (as Pb)	≤ 20 ppm
Solubility (in Water)	Clear solution

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