Description

4-amino-6-[[4'-[(2,4-diamino-5-sulphophenyl)azo]-3,3'-dimethoxy[1,1'-biphenyl]-4-yl]azo]-5-hydroxy-3-[(4-nitrophenyl)azo]naphthalene-2,7-disulphonic acid, sodium salt is a high-purity, polyazo dye intermediate of significant industrial importance. This compound is valued for its ability to impart deep, complex color shades and is a critical precursor in the synthesis of specialized dyes and pigments. It is primarily sought by manufacturers in the textile, ink, and specialty chemical industries for producing high-performance colorants.

Application

• Primary Intermediate for Polyazo Dyes: A key building block for synthesizing complex, high-molecular-weight azo dyes, particularly for textile fibers like cotton, wool, and nylon.
• Specialty Ink Manufacturing: Used in the production of high-quality inks for packaging, security printing, and digital textile printing, where color fastness and intensity are critical.
• Pigment Synthesis: Serves as a precursor for creating organic pigments used in plastics, coatings, and paints, offering excellent tinting strength and durability.
• Research & Development: Utilized in chemical R&D for developing novel chromophores and studying structure-property relationships in dye chemistry.
• Analytical Chemistry Reagent: Can be employed as a staining agent or a complexometric indicator in specific laboratory analyses.

Basic Information

Item	Details
Product Name	4-amino-6-[[4'-[(2,4-diamino-5-sulphophenyl)azo]-3,3'-dimethoxy[1,1'-biphenyl]-4-yl]azo]-5-hydroxy-3-[(4-nitrophenyl)azo]naphthalene-2,7-disulphonic acid, sodium salt
CAS No.	83763-77-3
Molecular Formula	C41H30N10O13S3Na2 (or related sodium salt form)
Molecular Weight	Contact for details
Synonyms	Direct Black 166 (C.I. 30026); C.I. Direct Black 166; Direct Black 166, sodium salt; Polyazo black dye intermediate; 4-Amino-5-hydroxy-3-[(4-nitrophenyl)azo]-6-[[4'-[(2,4-diamino-5-sulfophenyl)azo]-3,3'-dimethoxy[1,1'-biphenyl]-4-yl]azo]naphthalene-2,7-disulfonic acid disodium salt; C.I. 30026; Azo Black 166 Intermediate
EINECS	Contact for details

Quality Control

Our production of this dye intermediate adheres to strict quality control protocols to ensure batch-to-batch consistency and high purity. Quality is verified through advanced analytical techniques including HPLC, UV-Vis spectroscopy, and elemental analysis. A comprehensive Certificate of Analysis (COA) detailing purity, impurity profile, and physical specifications is provided with every shipment to guarantee it meets your specific application 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 tightly sealed to prevent moisture absorption, which can affect product performance. Keep away from incompatible materials.

Specification

Item	Specification
Appearance	Dark blue to black powder or solid
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0% (typical)
Moisture Content	≤ 5.0%
Ash Content	Contact for details
Solubility (Water)	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.