Description

4-Amino-6-[[4-[[[4-[(2,4-Diaminophenyl)Azo]Phenyl]Amino]Sulphonyl]Phenyl]Azo]-5-Hydroxy-3-[(4-Nitrophenyl)Azo]Naphthalene-2,7-Disulphonic Acid, Potassium Salt is a high-purity, complex azo dye intermediate essential for producing vibrant and durable colorants. This compound matters for its role in synthesizing specialized dyes with excellent lightfastness and washfastness properties, meeting stringent industrial quality demands. It is primarily needed by manufacturers in the textile, ink, and specialty polymer industries seeking reliable, high-performance color components for their formulations.

Application

• Textile Dyeing: A key intermediate for the synthesis of high-grade, washfast azo dyes used on cotton, wool, and synthetic fibers.
• Ink Manufacturing: Used in the production of pigments for industrial printing inks, including packaging and security inks.
• Specialty Polymers: Acts as a colorant precursor for engineering plastics and coatings requiring specific chromatic and stability properties.
• Leather Coloring: Employed in the formulation of dyes for the leather tanning and finishing industry.
• Paper Coloring: Used in the manufacture of dyes for high-quality paper and cardboard products.
• Research & Development: Serves as a critical reference standard and starting material in chemical R&D for novel chromophores.

Basic Information

Item	Details
Product Name	4-Amino-6-[[4-[[[4-[(2,4-Diaminophenyl)Azo]Phenyl]Amino]Sulphonyl]Phenyl]Azo]-5-Hydroxy-3-[(4-Nitrophenyl)Azo]Naphthalene-2,7-Disulphonic Acid, Potassium Salt
CAS No.	85223-29-6
Molecular Formula	C40H26KN11O13S3
Molecular Weight	1012.03 g/mol
Synonyms	Potassium 4-Amino-6-{[4-({[4-((2,4-diaminophenyl)diazenyl)phenyl]amino}sulfonyl)phenyl]diazenyl}-5-hydroxy-3-[(4-nitrophenyl)diazenyl]naphthalene-2,7-disulfonate; CI 34200; Direct Black 166; Azo Black Dye Intermediate; 4-Amino-5-hydroxy-3-[(4-nitrophenyl)azo]-6-{[4-({[4-((2,4-diaminophenyl)azo)phenyl]amino}sulfonyl)phenyl]azo}naphthalene-2,7-disulfonic acid potassium salt; 85223-29-6; Potassium salt of a complex azo dye acid
EINECS	Contact for details

Quality Control

Our 4-Amino-6-[[4-[[[4-[(2,4-Diaminophenyl)Azo]Phenyl]Amino]Sulphonyl]Phenyl]Azo]-5-Hydroxy-3-[(4-Nitrophenyl)Azo]Naphthalene-2,7-Disulphonic Acid, Potassium Salt is produced under a strict quality management system. Every batch undergoes rigorous analytical testing to ensure consistent purity, identity, and performance. Certificates of Analysis (COA) detailing key parameters such as assay, impurity profile, and heavy metal content are available upon request to support your quality assurance protocols.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at room temperature (15-25°C). Keep away from strong oxidizing agents and incompatible materials. The container should be kept tightly sealed to minimize exposure to atmospheric moisture.

Specification

Item	Specification
Appearance	Dark blue to black powder or crystalline solid
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 5.0%
Sulfated Ash	Contact for details
Heavy Metals (as Pb)	≤ 20 ppm
Solubility	Soluble in water; slightly soluble in organic solvents

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