Description

6-Amino-5-[(4-amino-2-sodiosulfophenyl)azo]-7'-[[4'-[(2,4-diaminophenyl)azo]-3,3'-dimethoxy[1,1'-biphenyl]-4-yl]azo]-1,8'-dihydroxy[2,2'-azobisnaphthalene]-3,6'-disulfonic acid disodium salt is a high-purity, complex azo dye intermediate designed for demanding industrial synthesis. This compound is valued for its role as a key precursor in the production of high-performance, multi-functional dyes and pigments. It is essential for manufacturers in the textile, ink, and specialty coatings industries seeking to develop products with enhanced color strength and specific functional properties.

Application

• Primary Intermediate for Polyazo Dyes: Serves as a critical building block in the synthesis of deep, complex shades like blacks, navies, and dark browns for textiles and leather.
• Functional Dye Manufacturing: Used in the production of dyes for inkjet inks, requiring high purity for consistent color performance and jetting reliability.
• Specialty Pigment Synthesis: A key precursor for creating high-grade pigments used in automotive paints, industrial coatings, and plastics.
• Research & Development: Employed in chemical R&D for developing novel chromophores with specific light-fastness and solubility characteristics.
• Paper Coloring: Suitable for the manufacture of dyes used in high-quality paper and board coloring processes.

Basic Information

Product Name	6-Amino-5-[(4-amino-2-sodiosulfophenyl)azo]-7'-[[4'-[(2,4-diaminophenyl)azo]-3,3'-dimethoxy[1,1'-biphenyl]-4-yl]azo]-1,8'-dihydroxy[2,2'-azobisnaphthalene]-3,6'-disulfonic acid disodium salt
CAS No.	6409-99-0
Molecular Formula	C46H34N12Na2O16S4
Molecular Weight	~1160.99 g/mol (Contact for details)
Synonyms	Direct Black 22 (disodium salt); C.I. 35435; Pontamine Black E; Azo Black; 1,8-Dihydroxy-6-amino-5-[(4-amino-2-sulfophenyl)azo]-7'-[[4'-[(2,4-diaminophenyl)azo]-3,3'-dimethoxybiphenyl-4-yl]azo]naphthalene-3,6'-disulfonic Acid Disodium Salt; 2,7-Naphthalenedisulfonic acid, 6-amino-5-[(4-amino-2-sulfophenyl)azo]-4-hydroxy-3-[[4-[[2-(hydroxy-kappaO)-5-[(2-hydroxy-5-sulfophenyl)azo]phenyl]azo]-3,3'-dimethoxy[1,1'-biphenyl]-4-yl]azo]-, sodium salt (1:2)
EINECS	Contact for details

Quality Control

Our production of this advanced dye intermediate adheres to stringent quality control protocols to ensure batch-to-batch consistency and reliability for your synthesis processes. Quality is verified through modern analytical techniques including HPLC for purity and identity confirmation. A comprehensive Certificate of Analysis (COA) detailing assay, 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). Keep away from incompatible materials. Due to its light-sensitive nature, handling and transfer should be conducted under conditions that minimize light exposure.

Specification

Item	Specification
Appearance	Dark blue to black powder or solid
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0% (Area %)
Loss on Drying	≤ 5.0%
Sulfated Ash	Contact for details
Heavy Metals (as Pb)	≤ 20 ppm
Solubility (in Water)	Soluble, clear solution

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