Description

Tetrasodium 2,2'-[(3,3'-dimethyl[1,1'-biphenyl]-4,4'-diyl)bis[imino[1-(1-hydroxyethylidene)-2-oxo-2,1-ethanediyl]azo]]bis[5-[[[(4-sulphonatophenyl)amino]carbonyl]amino]benzoate] CAS NO 94160-42-6 is a high-purity, water-soluble, anionic azo dye intermediate of significant industrial importance. Its complex molecular structure, featuring multiple azo linkages, carboxylate, and sulphonate groups, provides excellent binding and chromophoric properties. This compound is essential for manufacturers requiring precise color development and enhanced functional performance in advanced material formulations.

Application

• Textile Dyeing & Printing: As a key intermediate for producing high-fastness, reactive, and direct dyes for cotton, wool, and synthetic fibers.
• Paper Coloring: Used in the manufacture of dyes for high-quality paper and specialty packaging materials.
• Functional Pigments & Inks: Serves as a precursor for creating pigments used in industrial inks, coatings, and toners.
• Leather Processing: Employed in the synthesis of dyes for achieving uniform and durable coloration of leather goods.
• Research & Development: A critical building block in chemical R&D for synthesizing novel chromophores and functional dyes.
• Specialty Chemical Synthesis: Used in the production of complex colorants for plastics, polymers, and advanced materials.

Basic Information

Product Name	Tetrasodium 2,2'-[(3,3'-dimethyl[1,1'-biphenyl]-4,4'-diyl)bis[imino[1-(1-hydroxyethylidene)-2-oxo-2,1-ethanediyl]azo]]bis[5-[[[(4-sulphonatophenyl)amino]carbonyl]amino]benzoate]
CAS No.	94160-42-6
Molecular Formula	C58H44N12Na4O20S2
Molecular Weight	~1350.10 g/mol (Contact for exact details)
Synonyms	Reactive Black 5 Intermediate; Tetrasodium 4,4'-Bis[2-[4-[[4-(Carboxyamino)phenyl]sulfonyl]phenyl]diazenyl]-3,3'-dimethylbiphenyl-4,4'-diylbis(azanediyl)bis(4-oxobut-2-enoate); C.I. Reactive Black 5 Tetrasodium Salt Precursor; 94160-42-6; Azo Dye Intermediate DB-5; Tetrasodium Salt of Azo Dye Acid Black 5; Bis-azo Tetrasodium Carboxylate Sulfonate
EINECS	Contact for details

Quality Control

Our production of this advanced dye intermediate adheres to strict quality management systems. Every batch undergoes comprehensive analytical testing, including HPLC for purity and identity confirmation, to ensure consistency and meet precise customer specifications. Certificates of Analysis (COA) documenting key parameters such as assay, impurity profile, and solubility are provided and 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). This product is hygroscopic (moisture-sensitive); the container must be kept tightly sealed to prevent absorption of atmospheric moisture, which can affect performance.

Specification

Item	Specification
Appearance	Dark Blue to Black Powder or Solid
Identification (IR)	Conforms to Structure
Assay (HPLC)	≥ 95.0%
Water Content (KF)	≤ 5.0%
Solubility (in Water)	Freely Soluble
Heavy Metals (as Pb)	≤ 20 ppm

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