Description

7,7'-[(4,6-Dihydroxy-1,3-Phenylene)Bis(Azo)]Bisnaphthalene-1,3-Disulphonic Acid is a high-purity, synthetic organic compound belonging to the class of bis-azo dyes and intermediates. This chemical is valued for its strong chromophoric properties and ability to form stable complexes with metal ions, making it a critical component in specialized colorant systems. It is primarily sought by manufacturers in the dyes and pigments, analytical chemistry, and specialty chemical synthesis industries for producing vivid colors and functional materials.

Application

• Primary Intermediate for Dyes and Pigments: Serves as a key building block in the synthesis of high-performance azo dyes, particularly for textiles, inks, and coatings requiring specific hue and fastness properties.
• Metal Complex Dye Production: Used in the manufacture of pre-metallized dyes, where it acts as a ligand to form stable complexes with metals like chromium, cobalt, or copper, enhancing color durability and lightfastness.
• Analytical Reagent: Functions as a colorimetric indicator or a complexing agent in analytical chemistry for the detection and quantification of specific metal ions in solution.
• Specialty Chemical Synthesis: Employed as a sophisticated intermediate in organic synthesis for creating advanced materials, including functional polymers and research chemicals.
• Laboratory Research & Development: Utilized in R&D settings for studying azo chemistry, photochemical properties, and developing new colorant technologies.

Basic Information

Product Name	7,7'-[(4,6-Dihydroxy-1,3-Phenylene)Bis(Azo)]Bisnaphthalene-1,3-Disulphonic Acid
CAS No.	65151-32-8
Molecular Formula	C26H16N4O10S2
Molecular Weight	608.56 g/mol
Synonyms	7,7'-[(4,6-Dihydroxy-1,3-phenylene)bis(azo)]bis[1,3-naphthalenedisulfonic acid]; 1,3-Naphthalenedisulfonic acid, 7,7'-[(4,6-dihydroxy-1,3-phenylene)bis(azo)]bis-; Bis-azo dye intermediate; Acid Black 107 intermediate; C.I. 18105 intermediate; 4,6-Dihydroxyisophthalic acid bis-azo derivative; 1,3-Naphthalenedisulfonic acid azo dye
EINECS	Contact for details

Quality Control

Our production of 7,7'-[(4,6-Dihydroxy-1,3-Phenylene)Bis(Azo)]Bisnaphthalene-1,3-Disulphonic Acid adheres to stringent quality management protocols to ensure batch-to-batch consistency and high purity. Every lot is subjected to comprehensive analytical testing, including HPLC for purity and identity confirmation. Certificates of Analysis (COA) detailing all specification parameters are provided and available upon request to support your quality assurance and regulatory needs.

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 tightly sealed after each use to prevent degradation from atmospheric moisture.

Specification

Item	Specification
Appearance	Dark brown to black powder or crystalline solid
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 5.0%
Sulfated Ash	≤ 1.0%
Heavy Metals (as Pb)	≤ 20 ppm
Related Substances (HPLC)	Individual impurity ≤ 1.0%; Total impurities ≤ 3.0%

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