Description

5-[[4'-[(6-Amino-1-Hydroxy-3-Sulfo-2-Naphtyl)Azo]-1,1'-Biphenyl-4-Yl]Azo]-2-Hydroxybenzoic Acid Disodium Salt is a high-purity, water-soluble azo dye intermediate of significant commercial importance. Its complex molecular structure, featuring multiple azo linkages and functional groups, makes it a critical precursor for synthesizing high-performance dyes and pigments. This compound is essential for manufacturers in the textile, ink, and specialty chemical industries seeking to produce vivid, stable colors with specific technical properties.

Application

• Primary Intermediate for Azo Dyes: Serves as a key building block in the synthesis of high-grade, polyazo direct dyes and acid dyes for textiles like cotton, wool, and nylon.
• Pigment Manufacturing: Used in the production of organic pigments for inks, plastics, and coatings, where color strength and stability are paramount.
• Research & Development: Employed in chemical research for developing novel chromophores and studying azo dye chemistry and photophysical properties.
• Specialty Chemical Synthesis: Acts as a functional intermediate for creating complex molecules used in analytical reagents or other advanced material applications.

Basic Information

Product Name	5-[[4'-[(6-Amino-1-Hydroxy-3-Sulfo-2-Naphtyl)Azo]-1,1'-Biphenyl-4-Yl]Azo]-2-Hydroxybenzoic Acid Disodium Salt
CAS No.	6253-15-2
Molecular Formula	C29H19N5O8S·2Na
Molecular Weight	659.54 g/mol
Synonyms	Direct Black 22 (disodium salt); C.I. 35435; 5-[(4'-[(6-Amino-1-hydroxy-3-sulfo-2-naphthyl)azo][1,1'-biphenyl]-4-yl)azo]-2-hydroxybenzoic acid disodium salt; Benzoic acid, 5-[[4'-[(6-amino-1-hydroxy-3-sulfo-2-naphthalenyl)azo][1,1'-biphenyl]-4-yl]azo]-2-hydroxy-, disodium salt; Azo Black D; Direct Black 22A; Pontamine Black E
EINECS	Contact for details

Quality Control

Our production of this azo dye intermediate adheres to stringent quality control protocols to ensure batch-to-batch consistency and high chemical purity. Every lot is analyzed using advanced techniques like HPLC to confirm identity and assay. A comprehensive Certificate of Analysis (COA) detailing purity, impurity profile, and physical specifications is provided with each shipment to support your quality assurance and regulatory 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 sealed to prevent absorption of atmospheric moisture, which can affect product stability and handling properties.

Specification

Item	Specification
Appearance	Dark brown to black powder
Identification (IR)	Conforms to structure
Assay (HPLC)	Min. 95%
Water Content (KF)	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.