Description

Tetrasodium 5,5'-[Carbonylbis[Imino(1-Hydroxy-3-Sulphonatonaphthalene-2,6-Diyl)Azo]]Bisnaphthalene-1-Sulphonate is a high-purity, water-soluble azo dye intermediate of significant industrial importance. This compound is valued for its role in synthesizing vibrant and stable dyes and pigments, particularly in applications requiring strong color fastness and chemical resistance. It is primarily sought by manufacturers in the textile, leather, ink, and specialty chemical industries for producing high-performance colorants.

Application

• Textile Dyeing & Printing: A key intermediate for producing reactive and direct dyes used on cotton, wool, and synthetic fibers.
• Leather Coloring: Used in the formulation of dyes for imparting deep, uniform colors to leather goods.
• Ink Manufacturing: Serves as a precursor for pigments in industrial inks, including those for packaging and printing.
• Paper Coloring: Employed in the production of dyes for specialty and decorative papers.
• Biological Staining: Potential use as an intermediate for histological stains and indicators in laboratory settings.
• Research & Development: Used as a standard or building block in chemical research for novel dye and functional material synthesis.

Basic Information

Product Name	Tetrasodium 5,5'-[Carbonylbis[Imino(1-Hydroxy-3-Sulphonatonaphthalene-2,6-Diyl)Azo]]Bisnaphthalene-1-Sulphonate
CAS No.	6410-42-0
Molecular Formula	C45H24N6Na4O16S4
Molecular Weight	1124.93 g/mol
Synonyms	Direct Blue 71 (Tetrasodium Salt); C.I. 34140; Amanil Sky Blue 3RL; Azo Brilliant Sky Blue; Tetrasodium 5,5'-[Carbonylbis(imino-2,6-disulfo-1-naphthylenazo)]di(1-naphthalenesulfonate); 6410-42-0; C.I. Direct Blue 71
EINECS	229-088-4

Quality Control

Our production of Tetrasodium 5,5'-[Carbonylbis[Imino(1-Hydroxy-3-Sulphonatonaphthalene-2,6-Diyl)Azo]]Bisnaphthalene-1-Sulphonate adheres to stringent quality management protocols. Every batch undergoes rigorous analytical testing, including HPLC for purity and identity confirmation, to ensure consistency and compliance with industry specifications. A comprehensive Certificate of Analysis (COA) detailing purity, impurity profile, and physical parameters is provided with each shipment to guarantee traceability and quality assurance for our B2B partners.

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). This material is hygroscopic (moisture-sensitive); therefore, the container must be kept tightly sealed after opening to prevent absorption of atmospheric moisture, which can affect product quality and handling.

Specification

Item	Specification
Appearance	Dark blue to bluish-black powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 5.0%
Sulfated Ash	≤ 30.0%
Water Solubility	Freely soluble

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