Description

Tetrasodium 4,4'-Bis[(1-Hydroxy-4-Sulphonato-2-Naphthyl)Azo][1,1'-Biphenyl]-2,2'-Disulphonate is a high-purity, water-soluble azo dye intermediate of significant commercial importance. This compound is valued for its role in synthesizing high-performance dyes and pigments, offering excellent color strength and stability. It is primarily sought by manufacturers in the textile, ink, and specialty chemical industries for producing vibrant and durable colorants.

Application

• Primary intermediate for the synthesis of direct dyes and reactive dyes used in textile coloring.
• Key component in the production of high-grade pigments for inks, paints, and coatings.
• Used in research and development of novel functional dyes for optical and electronic applications.
• Employed in the manufacturing of colorants for paper and specialty papers.
• Serves as a standard or reference material in analytical chemistry and quality control laboratories.
• Potential use in the development of sensitizers for photographic processes.

Basic Information

Product Name	Tetrasodium 4,4'-Bis[(1-Hydroxy-4-Sulphonato-2-Naphthyl)Azo][1,1'-Biphenyl]-2,2'-Disulphonate
CAS No.	84753-06-0
Molecular Formula	C44H24N4Na4O16S4
Molecular Weight	1088.9 g/mol
Synonyms	Direct Blue 218 (C.I. 24401); Tetrasodium 4,4'-[1,1'-Biphenyl]-2,2'-diylbis(azo)]bis[5-hydroxy-6-(4-sulfonato-1-naphthyl)azo]naphthalene-2,7-disulfonate; C.I. Direct Blue 218; Direct Blue 218, Tetrasodium Salt; 4,4'-Bis[(1-hydroxy-4-sulfo-2-naphthyl)azo]-2,2'-biphenyldisulfonic Acid Tetrasodium Salt; 1,1'-Biphenyl-2,2'-disulfonic Acid, 4,4'-Bis[(1-Hydroxy-4-Sulfo-2-Naphthyl)Azo]-, Tetrasodium Salt
EINECS	Contact for details

Quality Control

Our Tetrasodium 4,4'-Bis[(1-Hydroxy-4-Sulphonato-2-Naphthyl)Azo][1,1'-Biphenyl]-2,2'-Disulphonate is produced under a stringent quality management system. Each batch undergoes rigorous analytical testing, including HPLC for purity and identity confirmation, to ensure it meets exacting industry specifications. A comprehensive Certificate of Analysis (COA) detailing purity, assay, and impurity profiles is 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 when not in use to prevent absorption of atmospheric moisture, which can affect product quality and handling properties.

Specification

Item	Specification
Appearance	Dark Blue to Black Powder
Identification (IR)	Conforms to Standard
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 5.0%
Sulfated Ash	≤ 20.0%
Water Solubility	Freely Soluble

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