Description

6-Amino-5-[[4'-[(2-Amino-7-Sulfo-1-Naphtyl)Azo]-3,3'-Dimethyl-1,1'-Biphenyl-4-Yl]Azo]-2-Naphthalenesulfonic Acid Disodium Salt is a high-purity, water-soluble disazo dye intermediate of significant industrial importance. This compound is valued for its ability to impart strong, vibrant colors and its role as a key precursor in the synthesis of complex dyes and pigments. It is primarily sought by manufacturers in the textile, ink, and specialty chemical sectors for producing high-performance colorants.

Application

• Primary Intermediate for Azo Dyes: Serves as a critical building block in the synthesis of high-grade disazo and polyazo dyes, particularly for cotton and other cellulosic fibers.
• Textile Dyeing and Printing: Used in the manufacturing of dyes for textile applications requiring excellent color fastness and brightness.
• Inkjet and Printing Inks: A key component in the production of pigments for high-quality inks, including those used in inkjet printing and packaging.
• Leather and Paper Coloring: Employed in dye formulations for coloring leather goods and specialty papers.
• Research & Development: Utilized in chemical research for developing novel chromophores and studying azo dye chemistry and properties.
• Specialty Pigments: Acts as an intermediate for creating complex, high-performance pigments used in plastics and coatings.

Basic Information

Product Name	6-Amino-5-[[4'-[(2-Amino-7-Sulfo-1-Naphtyl)Azo]-3,3'-Dimethyl-1,1'-Biphenyl-4-Yl]Azo]-2-Naphthalenesulfonic Acid Disodium Salt
CAS No.	6448-80-2
Molecular Formula	C34H26N6O6S2 · 2Na
Molecular Weight	Contact for details
Synonyms	Direct Black 22 (disodium salt); C.I. 35435; 6-Amino-5-{[4'-[(2-amino-7-sulfo-1-naphthyl)azo]-3,3'-dimethyl[1,1'-biphenyl]-4-yl]azo}-2-naphthalenesulfonic acid disodium salt; Direct Black 22A; Benzo Fast Black D; Pontamine Black EBN; Azo Black D; Diamine Black BH
EINECS	Contact for details

Quality Control

Our production of 6-Amino-5-[[4'-[(2-Amino-7-Sulfo-1-Naphtyl)Azo]-3,3'-Dimethyl-1,1'-Biphenyl-4-Yl]Azo]-2-Naphthalenesulfonic Acid Disodium Salt adheres to stringent quality protocols to ensure batch-to-batch consistency and high purity for industrial applications. Every lot undergoes comprehensive analysis, including HPLC for purity and azo content determination, spectrophotometric analysis for color strength, and control of key impurities. Certificates of Analysis (COA) detailing all specifications are provided with each shipment.

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 performance and handling.

Specification

Item	Specification
Appearance	Dark blue to black powder or granules
Identification (IR)	Conforms to structure
Assay (HPLC)	Min. 95%
Color Strength	100% ± 5% (vs. Standard)
Moisture Content	Max. 5.0%
Water Solubility	Completely soluble
Ash Content (Sulfated)	Contact for details
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.