Description

Disodium 4-[[2,4-Dihydroxy-5-[[4-[(4-Sulphonatophenyl)Azo]Phenyl]Azo]Phenyl]Azo]Benzenesulphonate is a high-purity, water-soluble azo dye intermediate known for its excellent chromophore properties. This compound is critical for manufacturers requiring consistent, high-quality colorants with strong tinctorial strength and good lightfastness. It is primarily utilized by producers of dyes and pigments for textiles, inks, and specialty coatings who demand reliable supply and precise chemical specifications.

Application

• Primary intermediate for the synthesis of high-grade azo dyes and pigments.
• Key chromophore component in textile dyes for cotton, wool, and synthetic fibers.
• Manufacturing of colorants for inks, including packaging and security inks.
• Production of pigments for industrial coatings and plastics.
• Used in the formulation of specialized dyes for leather and paper.
• Potential use as a colorimetric reagent or indicator in analytical chemistry applications.

Basic Information

Product Name	Disodium 4-[[2,4-Dihydroxy-5-[[4-[(4-Sulphonatophenyl)Azo]Phenyl]Azo]Phenyl]Azo]Benzenesulphonate
CAS No.	70210-07-0
Molecular Formula	C30H20N6Na2O10S2
Molecular Weight	750.62 g/mol
Synonyms	Disodium 4-[(2,4-Dihydroxy-5-{[4-(4-sulfonatophenyl)diazenyl]phenyl}diazenyl)benzenesulfonate]; Benzenesulfonic acid, 4-[[2,4-dihydroxy-5-[[4-[(4-sulfophenyl)azo]phenyl]azo]phenyl]azo]-, disodium salt; C.I. Direct Brown 1:2; Direct Brown 1:2; Azo Dye Intermediate 70210-07-0; Tetrakis-azo dye intermediate; Disodium salt of a polyazo dye acid
EINECS	Contact for details

Quality Control

Our Disodium 4-[[2,4-Dihydroxy-5-[[4-[(4-Sulphonatophenyl)Azo]Phenyl]Azo]Phenyl]Azo]Benzenesulphonate is manufactured under a strict quality management system to ensure batch-to-batch consistency and high purity. Production adheres to relevant industrial standards, and each lot is accompanied by a comprehensive Certificate of Analysis (COA) detailing key parameters such as assay, impurity profile, and physical properties. Certificates are available upon request to support your quality assurance protocols.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at a controlled room temperature (15-25°C). Due to its hygroscopic nature, the container must be kept tightly sealed after opening to prevent moisture absorption, which can affect product performance and stability.

Specification

Item	Specification
Appearance	Dark brown to black powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 5.0%
Sulfated Ash	≤ 20.0%
Water Solubility	Freely soluble
Heavy Metals (as Pb)	≤ 20 ppm

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