Description

Disodium 4-Amino-3-[[4'-[(2-Amino-4-Hydroxyphenyl)Azo]-3,3'-Dimethyl[1,1'-Biphenyl]-4-Yl]Azo]-5-Hydroxy-6-[(4-Methoxyphenyl)Azo]Naphthalene-2,7-Disulphonate is a high-purity, synthetic organic dye belonging to the azo dye class, specifically engineered for demanding technical applications. Its complex polyazo structure provides exceptional color strength and specific affinity for various substrates, making it a critical component for achieving precise and durable coloration. This product is essential for manufacturers in the textile, ink, and specialty coatings industries who require consistent, high-performance colorants for their formulations.

Application

This specialized azo dye is designed for high-performance applications where color fastness and chemical stability are paramount.

• Textile Dyeing: Primary application for dyeing natural and synthetic fibers, particularly where high wash and light fastness are required.
• Ink Formulation: Used in the production of high-quality printing inks for packaging, security printing, and specialty publications.
• Industrial Coatings: Imparts color to coatings for plastics, metals, and other industrial materials.
• Leather Finishing: Employed in the dyeing process for leather goods to achieve deep, uniform shades.
• Paper Coloring: Suitable for specialty paper products requiring specific, vibrant colors.
• Research & Development: Serves as a key intermediate or reference standard in chemical research and analytical laboratories.

Basic Information

Item	Details
Product Name	Disodium 4-Amino-3-[[4'-[(2-Amino-4-Hydroxyphenyl)Azo]-3,3'-Dimethyl[1,1'-Biphenyl]-4-Yl]Azo]-5-Hydroxy-6-[(4-Methoxyphenyl)Azo]Naphthalene-2,7-Disulphonate
CAS No.	94159-53-2
Molecular Formula	C47H36N8Na2O11S2
Molecular Weight	990.93 g/mol
Synonyms	Direct Black 166 (C.I. 30026); C.I. Direct Black 166; Direct Black 166, Disodium salt; Azo Black 166; 4-Amino-3-[[4'-[(2-amino-4-hydroxyphenyl)azo]-3,3'-dimethyl[1,1'-biphenyl]-4-yl]azo]-5-hydroxy-6-[(4-methoxyphenyl)azo]naphthalene-2,7-disulfonic acid, disodium salt; Direct Black NB; Direct Deep Black NB
EINECS	Contact for details

Quality Control

Our production of Disodium 4-Amino-3-[[4'-[(2-Amino-4-Hydroxyphenyl)Azo]-3,3'-Dimethyl[1,1'-Biphenyl]-4-Yl]Azo]-5-Hydroxy-6-[(4-Methoxyphenyl)Azo]Naphthalene-2,7-Disulphonate adheres to a stringent quality management system. Every batch undergoes comprehensive analytical testing to ensure consistent purity, color strength, and application performance. We provide detailed Certificates of Analysis (COA) with each shipment, documenting key parameters such as assay, impurity profile, and physical properties to support your quality assurance protocols.

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). This product is hygroscopic (moisture-sensitive); ensure the container is kept tightly sealed when not in use to prevent absorption of atmospheric moisture, which can affect performance.

Specification

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

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