Description

Tetrasodium 5,5'-[Carbonylbis(Imino-4,1-Phenyleneazo)]Bis[8-[(4-Sulphonatophenyl)Azo]Naphthalene-2-Sulphonate] is a high-purity, water-soluble synthetic organic dye belonging to the class of bis-azo compounds. This compound is valued for its exceptional color strength, stability, and compatibility in demanding industrial formulations. It is primarily required by manufacturers in the textile, paper, leather, and specialty ink industries for producing vibrant and durable colorations.

Application

• Textile Dyeing: As a direct or reactive dye for coloring cotton, wool, silk, and nylon fibers.
• Paper Coloring: For tinting writing, printing, and specialty papers to achieve consistent hues.
• Leather Finishing: Used in dye baths for leather goods to provide deep, uniform color penetration.
• Ink Manufacturing: A key colorant in the production of inks for flexographic, gravure, and inkjet printing.
• Biological Staining: Potential use as a histological stain in laboratory settings due to its specific affinity.
• Industrial Pigments: Serves as a precursor or component in the synthesis of high-performance pigments.
• Research & Development: Utilized in chemical research as a model compound for studying azo dye chemistry and photostability.

Basic Information

Product Name	Tetrasodium 5,5'-[Carbonylbis(Imino-4,1-Phenyleneazo)]Bis[8-[(4-Sulphonatophenyl)Azo]Naphthalene-2-Sulphonate]
CAS No.	6409-83-2
Molecular Formula	C52H30N10Na4O16S4
Molecular Weight	~1250.0 g/mol (Contact for exact details)
Synonyms	Direct Blue 71; C.I. 34140; Amanil Sky Blue 6BX; Pontamine Sky Blue 6BX; Chlorantine Sky Blue 7BLL; Sirius Supra Blue 7BG; Tetrasodium 8,8'-[Carbonylbis[imino(1-hydroxy-4,2-phenylene)azo]]bis[7-hydroxy-1,3-naphthalenedisulfonate]; Azo Blue Dye 6409-83-2
EINECS	229-077-1

Quality Control

Our Tetrasodium 5,5'-[Carbonylbis(Imino-4,1-Phenyleneazo)]Bis[8-[(4-Sulphonatophenyl)Azo]Naphthalene-2-Sulphonate] is manufactured under a strict quality management system. Every batch undergoes comprehensive analytical testing, including HPLC for purity, spectrophotometry for color strength, and tests for insolubles and heavy metals to ensure it meets precise customer and industry specifications. Certificates of Analysis (COA) documenting all critical parameters are available upon request.

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 nature, the container must be kept tightly sealed to prevent moisture absorption, which can affect product performance and handling.

Specification

Item	Specification
Appearance	Dark Blue to Bluish-Black Powder
Identification (IR)	Conforms to Standard
Assay (HPLC)	Min. 95%
Color Strength	100 ± 3% (vs. Standard)
Moisture (Karl Fischer)	Max. 5.0%
Water Solubility	Completely Soluble
pH (1% Solution)	7.0 - 9.0
Heavy Metals (as Pb)	Max. 20 ppm

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