Description

Disodium 4-Amino-3-[[4'-[(2-Amino-4-Hydroxyphenyl)Azo][1,1'-Biphenyl]-4-Yl]Azo]-5-Hydroxy-6-(Phenylazo)Naphthalene-2,7-Disulphonate is a high-purity, synthetic organic dye belonging to the azo and disulphonate chemical class. This compound is valued for its strong chromophoric properties and excellent water solubility, making it a critical component for creating vivid and stable colors. It is primarily sought after by manufacturers in the textile, leather, and specialty ink industries for dyeing and printing applications.

Application

This specialized azo dye is engineered for high-performance coloration across several industrial sectors. Its key applications include:

• Textile Dyeing: Used for dyeing natural and synthetic fibers, particularly where bright, wash-fast shades are required.
• Leather Finishing: Applied in the dyeing of leather goods to achieve deep, uniform coloration.
• Ink Formulation: Serves as a colorant in the production of specialty inks, including inks for packaging and security printing.
• Paper Coloration: Employed in the manufacturing of colored papers and paper products.
• Biological Staining: Potential use as a histological stain in laboratory settings due to its specific affinity.
• Research & Development: Utilized as a chemical intermediate or reference standard in organic synthesis and analytical chemistry research.

Basic Information

Product Name	Disodium 4-Amino-3-[[4'-[(2-Amino-4-Hydroxyphenyl)Azo][1,1'-Biphenyl]-4-Yl]Azo]-5-Hydroxy-6-(Phenylazo)Naphthalene-2,7-Disulphonate
CAS No.	85895-85-8
Molecular Formula	C40H28N8Na2O10S2
Molecular Weight	906.86 g/mol
Synonyms	Direct Black 166; C.I. 30026; Disodium 4-amino-5-hydroxy-3-[[4'-[(2-amino-4-hydroxyphenyl)azo][1,1'-biphenyl]-4-yl]azo]-6-(phenylazo)naphthalene-2,7-disulfonate; 4-Amino-3-[[4'-[(2-amino-4-hydroxyphenyl)azo][1,1'-biphenyl]-4-yl]azo]-5-hydroxy-6-(phenylazo)naphthalene-2,7-disulfonic acid disodium salt; Azo Black 166; C.I. Direct Black 166; [1,1'-Biphenyl]-4-carboxamide, 4'-[(2-amino-4-hydroxyphenyl)azo]-N-(2-amino-4-hydroxyphenyl)-4-[[7-(aminosulfonyl)-1-hydroxy-3-sulfo-2-naphthalenyl]azo]-; Direct Black D-166
EINECS	Contact for details

Quality Control

Our production of Disodium 4-Amino-3-[[4'-[(2-Amino-4-Hydroxyphenyl)Azo][1,1'-Biphenyl]-4-Yl]Azo]-5-Hydroxy-6-(Phenylazo)Naphthalene-2,7-Disulphonate adheres to stringent quality management protocols. Every batch undergoes comprehensive analytical testing, including HPLC for purity and spectrophotometry for color strength, to ensure consistency and performance. Certificates of Analysis (COA) detailing purity, impurity profile, and physical specifications are provided with each shipment to guarantee compliance with your technical requirements.

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 sealed to prevent moisture absorption, which can affect product performance and stability.

Specification

Item	Specification
Appearance	Dark blue to black powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Color Strength	98 - 102% (vs. Standard)
Water Solubility	Freely soluble
Moisture Content (KF)	≤ 5.0%
Sulfated Ash	≤ 20.0%
Heavy Metals (as Pb)	≤ 20 ppm

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