Description

4-Amino-3,6-Bis[[4-[(2,4-Diaminophenyl)Azo]Phenyl]Azo]-5-Hydroxynaphthalene-2,7-Disulphonic Acid, Lithium Sodium Salt is a high-purity, multi-azo dye intermediate of significant commercial importance. This compound is valued for its ability to impart deep, stable colors and is a critical precursor in the synthesis of specialized dyes and pigments. It is primarily required by manufacturers in the textile, ink, and specialty coatings industries seeking to produce high-performance colorants.

Application

• Primary intermediate for the synthesis of high-grade, complex azo dyes and pigments.
• Key component in the production of dyes for textile fibers, including polyamide, wool, and silk.
• Used in formulating specialized inks for printing applications, particularly where color fastness is critical.
• Precursor for colorants used in the leather tanning and dyeing industry.
• Potential use in the development of functional dyes for non-textile applications such as optical data storage or sensors.
• Employed in research and development for novel chromogenic materials.

Basic Information

Product Name	4-Amino-3,6-Bis[[4-[(2,4-Diaminophenyl)Azo]Phenyl]Azo]-5-Hydroxynaphthalene-2,7-Disulphonic Acid, Lithium Sodium Salt
CAS No.	83221-72-1
Molecular Formula	C40H28LiN12NaO10S2 (Contact for details)
Molecular Weight	Contact for details
Synonyms	Lithium Sodium 4-Amino-3,6-bis[[4-[(2,4-diaminophenyl)azo]phenyl]azo]-5-hydroxy-2,7-naphthalenedisulfonate; C.I. 34200; Direct Black 166; Azo Black Dye Intermediate; 4-Amino-3,6-bis(4-((2,4-diaminophenyl)diazenyl)phenyl)diazenyl)-5-hydroxynaphthalene-2,7-disulfonic acid lithium sodium salt; Multi-azo Dye Salt; Complex Azo Dye Precursor
EINECS	Contact for details

Quality Control

Our production of this dye intermediate adheres to rigorous quality control protocols to ensure batch-to-batch consistency and purity. Quality is verified through analytical methods including HPLC, spectrophotometry, and titration. A comprehensive Certificate of Analysis (COA) detailing purity, identity, and impurity profiles is provided with every shipment to support your quality assurance processes.

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 (moisture-sensitive) nature, the container must be kept tightly sealed after opening to prevent degradation from atmospheric moisture.

Specification

Item	Specification
Appearance	Dark colored powder or solid
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 5.0%
Heavy Metals (as Pb)	≤ 20 ppm
Solubility (Water)	Partially soluble

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