Description

8-Hydroxy-7-[[4'-[(2-Hydroxy-1-Naphtyl)Azo]-1,1'-Biphenyl-4-Yl]Azo]-1,3,6-Naphthalenetrisulfonic Acid Trisodium Salt is a high-purity, water-soluble azo dye intermediate of significant industrial importance. Its complex molecular structure, featuring multiple azo linkages and sulfonate groups, makes it a critical precursor for synthesizing specialized dyes and pigments. This compound is essential for manufacturers in the textile, ink, and specialty chemical sectors seeking to produce vivid, stable colors with specific application properties.

Application

• Primary Intermediate for Azo Dyes: A key building block in the synthesis of acid dyes, direct dyes, and reactive dyes used for coloring nylon, silk, wool, and paper.
• Textile Industry: Used in the production of dyes that offer excellent wash-fastness and light-fastness on protein-based and polyamide fibers.
• Ink Manufacturing: Serves as a precursor for pigments and dyes in printing inks, including those for packaging and security applications.
• Biological Staining: Potential use as an intermediate for histochemical stains and indicators in laboratory settings.
• Research & Development: Utilized in chemical research for developing new chromophores, sensors, and functional materials.
• Specialty Chemical Synthesis: Acts as a starting material for creating metal-complex dyes and other advanced organic compounds.

Basic Information

Item	Detail
Product Name	8-Hydroxy-7-[[4'-[(2-Hydroxy-1-Naphtyl)Azo]-1,1'-Biphenyl-4-Yl]Azo]-1,3,6-Naphthalenetrisulfonic Acid Trisodium Salt
CAS No.	6426-67-1
Molecular Formula	C32H19N4Na3O10S3
Molecular Weight	800.67 g/mol
Synonyms	Trisodium 8-hydroxy-7-{[4'-({2-hydroxy-1-naphthyl}hydrazinylidene)methyl][1,1'-biphenyl]-4-yl}hydrazinylidene-methyl]naphthalene-1,3,6-trisulfonate; CI 18050; Acid Black 52 (related dye); Azo Dye Intermediate Black; 1,3,6-Naphthalenetrisulfonic acid, 8-hydroxy-7-[[4'-[(2-hydroxy-1-naphthalenyl)azo][1,1'-biphenyl]-4-yl]azo]-, trisodium salt; Trisodium 8-hydroxy-7-[(E)-[4'-[(E)-(2-hydroxynaphthalen-1-yl)diazenyl][1,1'-biphenyl]-4-yl]diazenyl]naphthalene-1,3,6-trisulfonate
EINECS	229-199-2

Quality Control

Our production of 8-Hydroxy-7-[[4'-[(2-Hydroxy-1-Naphtyl)Azo]-1,1'-Biphenyl-4-Yl]Azo]-1,3,6-Naphthalenetrisulfonic Acid Trisodium Salt adheres to a stringent quality management system. Every batch undergoes rigorous analytical testing, including HPLC for purity and identity confirmation, to ensure consistency and compliance with customer specifications. Certificates of Analysis (COA) detailing purity, impurity profile, and physical characteristics are provided with each shipment to guarantee traceability and 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). This product is hygroscopic (moisture-sensitive); therefore, the container must be kept tightly sealed after each use to prevent absorption of atmospheric moisture, which can affect product quality and handling properties.

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.