Description

Tetrasodium 4,4'-[Carbonylbis[Imino(5-Dimethoxy-2-Methyl-4,1-Phenylene)Azo]]Bisnaphthalene-2,7-Disulphonate is a high-purity, water-soluble anionic dye belonging to the class of bisazo compounds. This specialized chemical is valued for its strong colorant properties and excellent stability, making it a critical component in advanced industrial formulations. It is primarily sought by manufacturers in the textile, ink, and specialty coatings industries for its reliable performance and consistent quality.

Application

• Textile Dyeing: As a key dye for synthetic fibers, particularly polyamide (nylon) and protein-based fibers like wool and silk, providing vibrant and wash-fast colors.
• Ink Manufacturing: Used in the formulation of high-performance inks for jet printing, packaging, and security applications due to its solubility and color strength.
• Specialty Coatings & Paints: Incorporated into industrial coatings and artist-grade paints where specific hue and lightfastness are required.
• Paper Coloration: Employed in the production of specialty colored papers and security paper products.
• Biological Staining: Potential use as a histological stain in laboratory settings, given its affinity for certain biological tissues.
• Polymer Masterbatch: Used as a colorant in the production of masterbatches for coloring plastics during manufacturing.

Basic Information

Product Name	Tetrasodium 4,4'-[Carbonylbis[Imino(5-Dimethoxy-2-Methyl-4,1-Phenylene)Azo]]Bisnaphthalene-2,7-Disulphonate
CAS No.	82996-64-3
Molecular Formula	C44H34N6Na4O16S4
Molecular Weight	1108.98 g/mol
Synonyms	Acid Black 194; C.I. 30336; Tetrasodium 6,6'-[(1E)-1,2-Diazenediylbis[(3-methoxy-4-methyl-6,1-phenylene)imino(1-methyl-2-oxo-2,1-ethanediyl)]]bis[5-hydroxy-1,3-naphthalenedisulfonate]; Reactive Black 31 (related class); Bisazo Black Dye; Direct Black 194 (related class); Azo Dye 82996-64-3
EINECS	Contact for details

Quality Control

Our production of Tetrasodium 4,4'-[Carbonylbis[Imino(5-Dimethoxy-2-Methyl-4,1-Phenylene)Azo]]Bisnaphthalene-2,7-Disulphonate adheres to stringent quality protocols to ensure batch-to-batch consistency and purity. Each lot is analyzed against comprehensive specifications, including identity confirmation, assay, and impurity profiling. Certificates of Analysis (COA) documenting these results are available upon request to support your quality assurance and regulatory compliance needs.

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). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept tightly sealed after each use to prevent absorption of atmospheric moisture, which can affect product performance and stability.

Specification

Item	Specification
Appearance	Dark blue to black powder or granules
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 5.0%
Sulfated Ash	≤ 20.0%
Water Solubility	Completely soluble
Heavy Metals (as Pb)	≤ 20 ppm
Related Substances (HPLC)	Total impurities ≤ 3.0%

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