Description

5,5'-[Ureylenebis[(4-Amino-2,1-Phenylene)Azo[1,1'-Biphenyl]-4',4-Diylazo]]Bis[2,4-Diaminobenzenesulfonic Acid Sodium] Salt is a high-purity, complex azo dye intermediate with significant industrial importance. This compound is valued for its role in synthesizing high-performance dyes and pigments, offering excellent color strength and stability. It is primarily sought by manufacturers in the textile, ink, and specialty chemical industries for producing vibrant and durable colorants.

Application

• Primary Intermediate for Azo Dyes: Key starting material for the synthesis of high-grade, complex azo dyes used in textile coloring.
• Pigment Manufacturing: Utilized in the production of organic pigments for inks, coatings, and plastics, providing enhanced color fastness.
• Specialty Chemical Synthesis: Serves as a crucial building block in the synthesis of advanced functional dyes for non-textile applications.
• Research & Development: Used in chemical R&D for developing new chromophores and studying azo coupling reactions.

Basic Information

Product Name	5,5'-[Ureylenebis[(4-Amino-2,1-Phenylene)Azo[1,1'-Biphenyl]-4',4-Diylazo]]Bis[2,4-Diaminobenzenesulfonic Acid Sodium] Salt
CAS No.	6772-31-2
Molecular Formula	C50H38N16Na2O10S2
Molecular Weight	1108.12 g/mol
Synonyms	Direct Black 22 (disodium salt); C.I. 35435; Benzenediazonium, 4-amino-2-[(4'-[(4-amino-2-azophenyl)azo][1,1'-biphenyl]-4-yl)azo]-5-hydroxy-6-(phenylazo)-, inner salt, sodium salt; 5,5'-[Carbonylbis(imino-4,1-phenyleneazo)]bis[6-amino-4-hydroxy-2-(phenylazo)benzenesulfonic acid] disodium salt; Azo Black; Ureylene Bis Azo Dye Intermediate.
EINECS	Contact for details

Quality Control

Our production of this azo dye intermediate adheres to strict quality protocols to ensure batch-to-batch consistency and high purity. Quality is verified through advanced analytical techniques including HPLC and spectrophotometry. A comprehensive Certificate of Analysis (COA) detailing purity, identity, and impurity profiles is provided with every shipment to support your quality assurance processes.

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). Due to its hygroscopic nature, the container must be kept tightly sealed to minimize exposure to atmospheric moisture. Keep away from incompatible materials.

Specification

Item	Specification
Appearance	Dark brown to black powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 5.0%
Sulfated Ash	≤ 20.0%
Heavy Metals (as Pb)	≤ 20 ppm
Solubility (1% in Water)	Complete, clear solution

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