Description

Disodium 6-Hydroxy-5-[[2-Hydroxy-3-[(2-Hydroxynaphthyl)Azo]-5-Sulphonatophenyl]Azo]Naphthalene-2-Sulphonate is a high-purity, water-soluble azo dye intermediate essential for producing vivid and stable colorants. This compound matters for its role as a key precursor in synthesizing high-performance dyes and pigments, offering excellent chromophore properties and compatibility with various substrates. Industries that require precise and durable coloration, such as textile manufacturing, ink production, and specialty coatings, rely on this intermediate for consistent quality and performance.

Application

• Primary Intermediate for Dyes & Pigments: Serves as a critical building block in the synthesis of high-quality azo dyes for textiles, leather, and paper.
• Textile Colorant Production: Used in manufacturing dyes for cotton, wool, and synthetic fibers, providing strong color fastness.
• Ink Formulation: A key component in producing colorants for printing inks, including those used in packaging and publications.
• Specialty Coatings: Employed in creating pigments for industrial paints and coatings that require specific hue and stability.
• Laboratory & Research Reagent: Used as a standard or intermediate in chemical research and analytical method development.
• Potential Biological Staining: May find application in the development of histological or biological stains due to its chromophoric structure.

Basic Information

Product Name	Disodium 6-Hydroxy-5-[[2-Hydroxy-3-[(2-Hydroxynaphthyl)Azo]-5-Sulphonatophenyl]Azo]Naphthalene-2-Sulphonate
CAS No.	3258-74-0
Molecular Formula	C26H16N4Na2O9S2
Molecular Weight	638.52 g/mol
Synonyms	Acid Black 172; C.I. 15711; Disodium 6-hydroxy-5-[(2-hydroxy-3-[(2-hydroxynaphthyl)azo]-5-sulfophenyl)azo]naphthalene-2-sulfonate; 6-Hydroxy-5-((2-hydroxy-3-((2-hydroxynaphthyl)azo)-5-sulfophenyl)azo)naphthalene-2-sulfonic acid disodium salt; Azo Dye Intermediate 3258-74-0; C.I. Acid Black 172; 2-Naphthalenesulfonic acid, 6-hydroxy-5-((2-hydroxy-3-((2-hydroxy-1-naphthalenyl)azo)-5-sulfophenyl)azo)-, disodium salt
EINECS	221-865-8

Quality Control

Our Disodium 6-Hydroxy-5-[[2-Hydroxy-3-[(2-Hydroxynaphthyl)Azo]-5-Sulphonatophenyl]Azo]Naphthalene-2-Sulphonate is manufactured under a strict quality management system to ensure batch-to-batch consistency and high purity. Each lot undergoes comprehensive analytical testing, including HPLC for assay and impurity profiling, to confirm identity and meet specified standards. A Certificate of Analysis (COA) detailing all test results is provided with every shipment 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 (moisture-sensitive) nature, the container must be kept tightly sealed after each use to prevent absorption of atmospheric moisture. Keep away from incompatible materials.

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%
Heavy Metals (as Pb)	≤ 20 ppm
Water Solubility	Freely soluble

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