Description

Tetrasodium 2,2'-[(Carbonyldiimino)Bis[(2-Acetamido-4,1-Phenylene)Azo]]Bis[5-[(4-Sulphonatophenyl)Azo]Benzenesulphonate] is a high-purity, water-soluble azo dye intermediate of significant industrial importance. This compound is valued for its role in synthesizing complex, high-performance dyes and pigments, offering excellent color strength and stability. It is primarily sought after by manufacturers in the textile, ink, and specialty coatings industries for producing vibrant and durable colors.

Application

• Textile Dyeing and Printing: A key intermediate for producing reactive and direct dyes used on cotton, wool, and nylon fibers.
• Ink Manufacturing: Used in the synthesis of pigments for high-quality printing inks, including those for packaging and publications.
• Industrial Coatings: Serves as a precursor for pigments in coatings requiring specific color fastness and chemical resistance.
• Paper Coloring: Employed in the production of dyes for specialty paper and paperboard products.
• Leather Finishing: Used in dye formulations for coloring leather goods.
• Research & Development: Acts as a standard or building block in chemical research for developing new chromophores and functional materials.

Basic Information

Product Name	Tetrasodium 2,2'-[(Carbonyldiimino)Bis[(2-Acetamido-4,1-Phenylene)Azo]]Bis[5-[(4-Sulphonatophenyl)Azo]Benzenesulphonate]
CAS No.	83249-55-2
Molecular Formula	C52H34N12Na4O18S4
Molecular Weight	~1291.1 g/mol
Synonyms	Reactive Black 5 Tetrasodium Salt; C.I. Reactive Black 5; Remazol Black B; Lanasol Black B; Tetrasodium 4-amino-5-hydroxy-3-[[4-[[2-(sulfonatooxy)ethyl]sulfonyl]phenyl]azo]-6-(phenylamino)-2,7-naphthalenedisulfonate (common alternate representation); 2,2'-[(Carbonyldiimino)bis[(2-acetamido-4,1-phenylene)azo]]bis[5-[(4-sulfonatophenyl)azo]benzenesulfonic acid] tetrasodium salt; Azo Black; Tetranol Black B
EINECS	Contact for details

Quality Control

Our production of this dye intermediate adheres to strict quality management systems. Every batch undergoes comprehensive analytical testing, including HPLC for purity and identity confirmation, to ensure it meets precise customer specifications. A Certificate of Analysis (COA) detailing assay, impurity profile, and physical parameters is provided with each shipment to guarantee consistency and traceability.

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 nature, the container must be kept tightly sealed to prevent moisture absorption, which can affect product stability and handling properties.

Specification

Item	Specification
Appearance	Dark blue to black powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Moisture Content	≤ 5.0%
Water Solubility	Completely soluble
Heavy Metals (as Pb)	≤ 20 ppm
pH (1% Solution)	7.0 - 9.0

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