Description

Tetrasodium 3,3'-[(1-Amino-8-Hydroxy-3,6-Disulphonatonaphthalene-2,7-Diyl)Bis(Azo-4,1-Phenyleneazo)]Bis[6-Hydroxybenzoate] is a high-purity, water-soluble azo dye intermediate of significant industrial importance. This compound is valued for its role in synthesizing complex, high-performance dyes and pigments, particularly those requiring excellent light and wash fastness. It is primarily utilized by manufacturers in the textile, ink, and specialty coatings industries seeking to produce vivid and durable colorants.

Application

• Primary Intermediate for Reactive Dyes: A key building block in the synthesis of high-grade reactive dyes for cotton and other cellulosic fibers.
• Direct Dye Manufacturing: Used in the production of direct dyes for paper, leather, and textile applications.
• Specialty Pigment Synthesis: Serves as a precursor for creating complex organic pigments used in inks, plastics, and coatings.
• Research & Development: Employed in chemical R&D for developing novel chromophores and functional dyes.
• Analytical Chemistry: Can be used as a standard or reagent in specific colorimetric analytical methods.

Basic Information

Product Name	Tetrasodium 3,3'-[(1-Amino-8-Hydroxy-3,6-Disulphonatonaphthalene-2,7-Diyl)Bis(Azo-4,1-Phenyleneazo)]Bis[6-Hydroxybenzoate]
CAS No.	83846-57-5
Molecular Formula	C40H22N8Na4O18S2
Molecular Weight	1028.78 g/mol
Synonyms	Acid Black 210; Tetrasodium 6,6'-[carbonylbis(imino-4,1-phenyleneazo)]bis[4-hydroxy-2-naphthalenesulfonate]; C.I. 28440; Benzenesulfonic acid, 6,6'-[carbonylbis(imino-4,1-phenyleneazo)]bis[4-hydroxy-, tetrasodium salt; Reactive Black 5 precursor; Azo dye intermediate 83846-57-5
EINECS	Contact for details

Quality Control

Our production of this dye intermediate adheres to strict quality management protocols to ensure batch-to-batch consistency and high purity. Each lot is analyzed using advanced techniques including HPLC and spectrophotometry. A comprehensive Certificate of Analysis (COA) detailing purity, identity, and impurity profiles is provided with every shipment 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). Keep away from heat sources and incompatible materials. Due to its light-sensitive nature, prolonged exposure to direct light should be avoided.

Specification

Item	Specification
Appearance	Dark brown to black powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Moisture Content	≤ 5.0%
Sulfated Ash	≤ 20.0%
Solubility (in Water)	Freely soluble

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