Description

Tetrasodium 3,3'-[Carbonylbis[Imino(2,5-Dimethyl-4,1-Phenylene)Azo]]Bisnaphthalene-1,5-Disulphonate is a high-purity, water-soluble azo dye intermediate known for its excellent chromophore properties and stability. This compound is critical for synthesizing high-value, colorfast dyes and pigments used in demanding industrial applications. It is primarily sought by manufacturers in the textile, ink, and specialty chemical industries for producing vibrant and durable colors.

Application

• Textile Dyeing: A key intermediate for the synthesis of reactive and direct dyes for cotton, wool, and nylon, providing excellent wash and light fastness.
• Ink Manufacturing: Used in the production of high-performance pigments for inks in packaging, printing, and digital applications.
• Specialty Pigments: Serves as a precursor for creating complex organic pigments used in plastics, coatings, and automotive paints.
• Research & Development: Employed in chemical research for developing novel chromophores and studying azo dye chemistry.
• Paper Coloring: Utilized in the manufacture of dyes for high-quality paper and board products.
• Biological Staining: Potential use as an intermediate for synthesizing stains used in histological and cytological applications.

Basic Information

Product Name	Tetrasodium 3,3'-[Carbonylbis[Imino(2,5-Dimethyl-4,1-Phenylene)Azo]]Bisnaphthalene-1,5-Disulphonate
CAS No.	6420-29-7
Molecular Formula	C43H30N6Na4O13S4
Molecular Weight	1060.93 g/mol
Synonyms	Acid Blue 185; C.I. 74500; Tetrasodium 6,6'-[Carbonylbis[imino(2,5-dimethyl-1,4-phenylene)azo]]bis(1,5-naphthalenedisulfonate); 6420-29-7; Direct Blue 86 (related); Azo dye intermediate 6420-29-7; 1,5-Naphthalenedisulfonic acid, 6,6'-[carbonylbis[imino(2,5-dimethyl-1,4-phenylene)azo]]bis-, tetrasodium salt
EINECS	229-199-6

Quality Control

Our Tetrasodium 3,3'-[Carbonylbis[Imino(2,5-Dimethyl-4,1-Phenylene)Azo]]Bisnaphthalene-1,5-Disulphonate is manufactured under a strict quality management system. Every batch undergoes rigorous analytical testing to ensure high purity, consistent performance, and compliance with industry specifications. Comprehensive Certificates of Analysis (COA) detailing purity, identity, and impurity profiles are available upon request.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at room temperature (15-25°C). Keep away from incompatible materials. The product is light-sensitive and should be stored away from direct light exposure to maintain stability.

Specification

Item	Specification
Appearance	Dark blue to violet powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Water Content (KF)	≤ 5.0%
Sulfated Ash	≤ 20.0%
Heavy Metals (as Pb)	≤ 20 ppm
Solubility (in Water)	Freely soluble

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