Description

Tetrasodium 5-[[1-Hydroxy-6-(Phenylamino)-3-Sulphonato-2-Naphthyl]Azo]-8-[[6-Sulphonato-4-[(3-Sulphonatophenyl)Azo]Naphthyl]Azo]Naphthalene-2-Sulphonate is a high-purity, water-soluble azo dye intermediate with a complex polycyclic structure. This compound matters for its role in synthesizing high-performance, colorfast dyes and pigments, particularly for demanding technical applications. Industrial manufacturers in the textile, ink, and specialty coatings sectors rely on this consistent, high-quality intermediate to achieve precise and vibrant coloration in their final products.

Application

• Primary intermediate for the synthesis of high-grade, polyazo direct dyes and reactive dyes for cotton and cellulose fibers.
• Key precursor in manufacturing pigments for industrial inks, including those used in packaging and security printing.
• Used in the production of colorants for specialty paper coatings and decorative laminates.
• Employed in research and development of novel chromophores for advanced optical and electronic applications.
• Serves as a standard or reference compound in analytical chemistry for dye identification and quality control protocols.

Basic Information

Product Name	Tetrasodium 5-[[1-Hydroxy-6-(Phenylamino)-3-Sulphonato-2-Naphthyl]Azo]-8-[[6-Sulphonato-4-[(3-Sulphonatophenyl)Azo]Naphthyl]Azo]Naphthalene-2-Sulphonate
CAS No.	6428-60-0
Molecular Formula	C46H28N6Na4O16S4
Molecular Weight	~1132.9 g/mol
Synonyms	Direct Blue 71 (Tetrasodium Salt); C.I. 34140; Amanil Sky Blue FF; Pontamine Sky Blue 5BX; Tetrasodium 8,8'-[Carbonylbis(imino-4,1-phenylenecarbonylimino-4,1-phenylenecarbonylimino)]di-1,3,6-naphthalenetrisulfonate; Benzenesulfonic acid, 5-[[1-hydroxy-6-(phenylamino)-3-sulfo-2-naphthalenyl]azo]-8-[[6-sulfo-4-[(3-sulfophenyl)azo]-1-naphthalenyl]azo]-, tetrasodium salt; Azo Bordeaux; Direct Sky Blue 5B
EINECS	229-181-9

Quality Control

Our Tetrasodium 5-[[1-Hydroxy-6-(Phenylamino)-3-Sulphonato-2-Naphthyl]Azo]-8-[[6-Sulphonato-4-[(3-Sulphonatophenyl)Azo]Naphthyl]Azo]Naphthalene-2-Sulphonate is manufactured under a strict quality management system. Every batch undergoes rigorous analytical testing to ensure identity, purity, and consistency meet the high standards required for industrial dye synthesis. Certificates of Analysis (COA) detailing specific batch results are available upon request.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at a controlled room temperature (15-25°C). This material is hygroscopic (moisture-sensitive); 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 bluish-black powder or granules
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 85% (as dye content)
Moisture Content	≤ 8.0 %
Water Solubility	Freely soluble
pH (1% Solution)	7.0 - 9.0
Heavy Metals (as Pb)	≤ 20 ppm
Ash Content	Contact for details

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