Description

5,5'-[[4,6-Bis(Sodiosulfo)-1,3-Phenylene]Bis[Azo(4,6-Diamino-3,1-Phenylene)Azo(3,3'-Dimethyl[1,1'-Biphenyl]-4,4'-Diyl)Azo]]Bis[2-Hydroxybenzoic Acid Sodium] Salt is a high-purity, water-soluble azo dye intermediate of significant industrial importance. Its complex, multi-azo structure provides excellent chromophoric properties, making it a critical precursor for synthesizing specialized dyes and pigments. This compound is essential for manufacturers in the textile, ink, and specialty coatings industries seeking to produce vibrant, stable colors.

Application

• Primary Intermediate for Polyazo Dyes: Serves as a key building block in the synthesis of high-performance direct, acid, and reactive dyes for textiles like cotton, wool, and nylon.
• Specialty Pigment Manufacturing: Used in the production of pigments for inks, including packaging and security inks, where color strength and stability are paramount.
• Functional Dyes for Non-Textile Uses: Applicable in the formulation of dyes for paper, leather, and as colorants for various industrial products.
• Research & Development: Employed in chemical research for developing novel chromophores and studying azo dye chemistry and photophysical properties.

Basic Information

Product Name	5,5'-[[4,6-Bis(Sodiosulfo)-1,3-Phenylene]Bis[Azo(4,6-Diamino-3,1-Phenylene)Azo(3,3'-Dimethyl[1,1'-Biphenyl]-4,4'-Diyl)Azo]]Bis[2-Hydroxybenzoic Acid Sodium] Salt
CAS No.	6471-42-7
Molecular Formula	C62H44N14Na6O18S2
Molecular Weight	1471.2 g/mol (approx.)
Synonyms	Direct Black 19 (sodium salt); C.I. 35255; 5,5'-[[4,6-Bis(sodiosulfo)-1,3-phenylene]bis[azo(4,6-diamino-3,1-phenylene)azo(3,3'-dimethyl[1,1'-biphenyl]-4,4'-diyl)azo]]bis[2-hydroxybenzoic acid] sodium salt; Direct Black 19; Benzamide, 5,5'-[[4,6-bis(sodiosulfo)-1,3-phenylene]bis[azo(4,6-diamino-3,1-phenylene)azo(3,3'-dimethyl[1,1'-biphenyl]-4,4'-diyl)azo]]bis[2-hydroxy-, sodium salt; Direct Black B; Direct Black BN
EINECS	Contact for details

Quality Control

Our production of this azo dye intermediate adheres to strict quality management protocols to ensure batch-to-batch consistency and high purity. Each lot is analyzed using advanced techniques like HPLC and spectrophotometry to confirm identity, strength, and impurity profiles. A Certificate of Analysis (COA) detailing specific results is provided with every shipment to support your quality assurance and regulatory needs.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at room temperature (15-25°C). This material is hygroscopic (moisture-sensitive); keep the container tightly sealed to prevent absorption of atmospheric moisture.

Specification

Item	Specification
Appearance	Dark brown to black powder or solid
Identification (IR)	Conforms to structure
Assay (HPLC)	Min. 95%
Water Content	Max. 5.0%
Solubility (1% in Water)	Complete, clear solution
Heavy Metals (as Pb)	Max. 20 ppm

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