Description

Tetrasodium 3,3'-[Carbonylbis(Imino-p-Phenyleneazo)]Bis[4-Amino-5-Hydroxy-6-(Phenylazo)Naphthalene-2,7-Disulphonate] is a high-purity, complex organic dye intermediate. This compound matters for its role as a key precursor in synthesizing high-value, colorfast dyes and pigments for demanding industrial applications. It is primarily needed by manufacturers in the textile, ink, and specialty coatings industries seeking to produce vibrant, durable colors. Consistent quality of this intermediate is critical for ensuring batch-to-batch reproducibility in final product performance.

Application

• Textile Dye Manufacturing: As a crucial intermediate for producing high-grade, wash-fast azo dyes for synthetic and natural fibers.
• Industrial Ink Production: Used in the synthesis of pigments for printing inks, including packaging and security inks requiring specific color properties.
• Specialty Coatings and Paints: Serves as a building block for organic pigments used in automotive, industrial, and decorative coatings.
• Paper Coloring: Intermediate for dyes used in high-quality paper and board products.
• Leather Dyeing: Used in the production of dyes for achieving deep, uniform coloration on leather goods.
• Plastics and Polymers: Can be utilized in the synthesis of colorants for mass pigmentation of plastics and synthetic materials.
• Research and Development: Serves as a standard or starting material in chemical R&D for novel chromophores and functional dyes.
• Analytical Reagents: Potential use as a staining agent or indicator in specific analytical chemistry applications.

Basic Information

Product Name	Tetrasodium 3,3'-[Carbonylbis(Imino-p-Phenyleneazo)]Bis[4-Amino-5-Hydroxy-6-(Phenylazo)Naphthalene-2,7-Disulphonate]
CAS No.	59262-64-5
Molecular Formula	C52H32N12Na4O16S4
Molecular Weight	~1240.1 g/mol
Synonyms	Direct Black 22, Tetrasodium Salt; C.I. 35435; Tetrasodium 3,3'-[Carbonylbis(imino-p-phenylenazo)]bis[4-amino-5-hydroxy-6-(phenylazo)naphthalene-2,7-disulphonate]; Azo Black Dye Intermediate; 3,3'-[Carbonylbis(imino-p-phenylenazo)]bis[4-amino-5-hydroxy-6-(phenylazo)naphthalene-2,7-disulphonic acid] tetrasodium salt; C.I. Direct Black 22; Direct Black 22 (tetrasodium salt); Benzo Black Intermediate
EINECS	Contact for details

Quality Control

Our Tetrasodium 3,3'-[Carbonylbis(Imino-p-Phenyleneazo)]Bis[4-Amino-5-Hydroxy-6-(Phenylazo)Naphthalene-2,7-Disulphonate] is produced under a stringent quality management system. Each batch undergoes rigorous analytical testing, including HPLC for purity and identity confirmation, to ensure it meets exacting industry standards. Certificates of Analysis (COA) detailing all critical specifications 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 to prevent absorption of atmospheric moisture. Keep away from incompatible materials.

Specification

Item	Specification
Appearance	Dark blue to black powder or solid
Identification (IR)	Conforms to structure
Assay (HPLC)	Min. 95%
Loss on Drying	Max. 5.0%
Sulfated Ash	Contact for details
Heavy Metals (as Pb)	Max. 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.