Description

Disodium 7-[[2,6-Dihydroxy-3-[[4-[(4-Sulphonatophenyl)Azo]Phenyl]Azo]Phenyl]Azo]-4-Hydroxynaphthalene-2-Sulphonate is a high-purity, water-soluble azo dye intermediate of significant commercial importance. Its complex polyazo structure provides excellent chromophore properties, 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 vibrant, stable colors.

Application

• Primary intermediate for the synthesis of azo dyes and pigments used in textile dyeing and printing.
• Key chromophore component in the production of industrial inks for packaging, printing, and coding applications.
• Used in the formulation of specialty colorants for coatings, plastics, and leather.
• Acts as a functional intermediate in research and development of novel colorants and optical materials.
• Potential use as a biological stain or indicator in analytical chemistry and life sciences research.

Basic Information

Product Name	Disodium 7-[[2,6-Dihydroxy-3-[[4-[(4-Sulphonatophenyl)Azo]Phenyl]Azo]Phenyl]Azo]-4-Hydroxynaphthalene-2-Sulphonate
CAS No.	93940-01-3
Molecular Formula	C34H22N6Na2O11S2
Molecular Weight	800.73 g/mol
Synonyms	7-[[2,6-Dihydroxy-3-[[4-[(4-Sulfophenyl)azo]phenyl]azo]phenyl]azo]-4-hydroxy-2-naphthalenesulfonic Acid Disodium Salt; C.I. Direct Brown 1:1; Direct Brown 1:1; Polyazo Dye Intermediate; Disodium 4-Hydroxy-7-[[3-[[4-[(4-sulfophenyl)azo]phenyl]azo]-2,6-dihydroxyphenyl]azo]-2-naphthalenesulfonate; 4-Hydroxy-7-[[3-[[4-[(4-sulfophenyl)azo]phenyl]azo]-2,6-dihydroxyphenyl]azo]-2-naphthalenesulfonic Acid Disodium Salt
EINECS	Contact for details

Quality Control

Our production of this azo dye intermediate adheres to strict quality management systems to ensure batch-to-batch consistency and high purity. Every lot undergoes comprehensive analytical testing, including HPLC for assay and impurity profiling and spectrophotometric analysis for color strength. A detailed Certificate of Analysis (COA) is provided with each shipment, confirming compliance with agreed 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). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept sealed when not in use to prevent absorption of atmospheric moisture, which can affect product stability and performance.

Specification

Item	Specification
Appearance	Dark brown to black powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Water Content	≤ 5.0%
Solubility (in Water)	Clear solution
Heavy Metals (as Pb)	≤ 20 ppm

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