Description

Tetrasodium 7-amino-3-[[2,5-dimethoxy-4-[[7-sulphonato-4-[(2-sulphonatophenyl)azo]naphthyl]azo]phenyl]azo]-4-hydroxy-8-[(3-sulphonatophenyl)azo]naphthalene-2-sulphonate is a high-purity, polyazo dye intermediate of significant commercial importance. This compound is valued for its role in synthesizing complex, high-performance dyes and pigments, particularly for demanding applications requiring specific color properties and stability. It is primarily utilized by manufacturers in the textile, ink, and specialty coatings industries seeking to produce vivid and durable colors.

Application

• Primary Intermediate for Reactive Dyes: A key building block in the synthesis of high-grade reactive dyes for cotton and other cellulosic fibers.
• Textile Dye Manufacturing: Used to produce dyes for wool, silk, and nylon, offering excellent wash and light fastness.
• Inkjet Ink Formulation: Employed in the creation of specialized pigments for high-quality digital and industrial printing inks.
• Leather Dyeing: Serves as an intermediate for dyes used in the leather processing industry.
• Paper Coloring: Used in the manufacture of dyes for specialty paper and packaging products.
• Research & Development: A critical compound for R&D laboratories developing new chromophores and functional dyes.

Basic Information

Product Name	Tetrasodium 7-amino-3-[[2,5-dimethoxy-4-[[7-sulphonato-4-[(2-sulphonatophenyl)azo]naphthyl]azo]phenyl]azo]-4-hydroxy-8-[(3-sulphonatophenyl)azo]naphthalene-2-sulphonate
CAS No.	70210-35-4
Molecular Formula	Contact for details
Molecular Weight	Contact for details
Synonyms	C.I. Reactive Black 5 Intermediate; Tetrasodium 4-Amino-5-hydroxy-3,6-bis((4-((2-sulfonatophenyl)azo)-7-sulfonato-1-naphthyl)azo)-2,7-naphthalenedisulfonate; Polyazo Dye Intermediate 70210-35-4; Reactive Dye Precursor; 1,3,6,8-Pyrenetetrasulfonic Acid Derivative (related class); Tetrasodium Salt of Azo Dye Intermediate
EINECS	Contact for details

Quality Control

Our tetrasodium azo dye intermediate is produced under strict quality management systems to ensure batch-to-batch consistency and high purity. Each lot is analyzed using advanced chromatographic and spectroscopic techniques to confirm identity and assess impurity profiles. A comprehensive Certificate of Analysis (COA) detailing purity, assay, and specific tests is provided with every shipment to 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). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept sealed to prevent absorption of atmospheric moisture, which can affect product stability and handling properties.

Specification

Item	Specification
Appearance	Dark powder or solid
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Moisture Content	≤ 5.0%
Sulfated Ash	Contact for details
Heavy Metals (as Pb)	≤ 20 ppm

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