Description

Disodium 4,4'-Bis[(2-Hydroxy-1-Naphthyl)Azo]-5,5'-Dimethoxy[1,1'-Biphenyl]-2,2'-Disulphonate is a high-purity, synthetic azo dye intermediate known for its distinct chromophoric properties. This compound is valued for its role in producing vivid and stable colorants, particularly in applications requiring specific lightfastness and chemical resistance. It serves as a critical building block for manufacturers in the textile dyeing, specialty ink formulation, and high-performance pigment industries.

Application

• Primary Intermediate for Azo Dyes and Pigments: A key precursor in the synthesis of high-value, complex azo dyes used in textiles, leather, and plastics.
• Specialty Ink Manufacturing: Used in the production of inks for security printing, packaging, and high-resolution digital printing where color stability is paramount.
• Functional Colorant for Polymers: Imparts color to engineering plastics and synthetic fibers, offering good dispersion and thermal stability during processing.
• Research & Development: Serves as a standard or starting material in chemical research for developing new chromophores and studying dye-sensitized systems.
• Analytical Reagent: Can be utilized as a staining agent or colorimetric indicator in specific laboratory and diagnostic applications.

Basic Information

Product Name	Disodium 4,4'-Bis[(2-Hydroxy-1-Naphthyl)Azo]-5,5'-Dimethoxy[1,1'-Biphenyl]-2,2'-Disulphonate
CAS No.	6428-81-5
Molecular Formula	C40H26N4Na2O10S2
Molecular Weight	832.73 g/mol
Synonyms	Direct Blue 80; C.I. 24315; Disodium 4,4'-bis(2-hydroxy-1-naphthylazo)-5,5'-dimethoxybiphenyl-2,2'-disulfonate; 4,4'-Bis[(2-hydroxy-1-naphthyl)azo]-5,5'-dimethoxy[1,1'-biphenyl]-2,2'-disulfonic acid disodium salt; Azo Blue 80; C.I. Direct Blue 80; Direct Blue 80 (C.I. 24315); Benzenesulfonic acid, 4,4'-bis[(2-hydroxy-1-naphthalenyl)azo]-5,5'-dimethoxy[1,1'-biphenyl]-2,2'-diyl ester, disodium salt
EINECS	229-208-5

Quality Control

Our production of Disodium 4,4'-Bis[(2-Hydroxy-1-Naphthyl)Azo]-5,5'-Dimethoxy[1,1'-Biphenyl]-2,2'-Disulphonate adheres to stringent quality management protocols. Each batch undergoes comprehensive analytical testing, including HPLC for purity and identity confirmation, to ensure it meets precise customer specifications and industry standards. Certificates of Analysis (COA) documenting all critical parameters are provided with every shipment.

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 to prevent absorption of atmospheric moisture, which can affect product performance and handling.

Specification

Item	Specification
Appearance	Dark blue to violet powder or crystalline solid
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0% (typical 97-99%)
Loss on Drying	≤ 5.0%
Sulfated Ash	≤ 20.0%
Heavy Metals (as Pb)	≤ 20 ppm
Water Solubility	Freely soluble in water

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