Description

2-[[4-[(4-Amino-5-Sulfo-1-Naphthalenyl)Azo]-7-Sulfo-1-Naphthalenyl]Azo]-1,4-Benzenedisulfonic Acid is a high-purity, multi-sulfonated azo dye intermediate of significant commercial importance. Its complex polycyclic structure with multiple sulfonic acid groups makes it a key precursor for synthesizing high-value, water-soluble dyes and pigments. This compound is essential for manufacturers in the textile, ink, and specialty chemical industries seeking to produce vivid and stable colorants.

Application

• Primary Intermediate for Reactive Dyes: Serves as a critical building block in the synthesis of high-performance reactive dyes for cotton and other cellulosic fibers.
• Production of Acid Dyes: Used in manufacturing acid dyes for wool, silk, and nylon, providing excellent wash and light fastness.
• Specialty Pigment Synthesis: Acts as a precursor for creating lake pigments and other specialty colorants used in inks and coatings.
• Research & Development: Employed in chemical R&D for developing novel chromophores and functional dyes with specific optical properties.
• Analytical Chemistry: Can be utilized as a standard or reagent in analytical methods due to its distinct chemical structure.

Basic Information

Product Name	2-[[4-[(4-Amino-5-Sulfo-1-Naphthalenyl)Azo]-7-Sulfo-1-Naphthalenyl]Azo]-1,4-Benzenedisulfonic Acid
CAS No.	75627-28-0
Molecular Formula	C26H17N5O12S4
Molecular Weight	719.69 g/mol
Synonyms	Acid Black 210; C.I. 28440; 1,4-Benzenedisulfonic acid, 2-[[4-[(4-amino-5-sulfo-1-naphthalenyl)azo]-7-sulfo-1-naphthalenyl]azo]-; 2-[[4-[(4-Amino-5-sulfo-1-naphthyl)azo]-7-sulfo-1-naphthyl]azo]-1,4-benzenedisulfonic acid; C.I. Acid Black 210; Polyazo dye intermediate; Tetrasulfonated azo dye intermediate
EINECS	Contact for details

Quality Control

Our production of 2-[[4-[(4-Amino-5-Sulfo-1-Naphthalenyl)Azo]-7-Sulfo-1-Naphthalenyl]Azo]-1,4-Benzenedisulfonic Acid adheres to rigorous quality testing protocols to ensure batch-to-batch consistency and compliance with industry specifications. Quality is verified through advanced analytical techniques including HPLC and spectrophotometry. A comprehensive Certificate of Analysis (COA) detailing purity, identity, and impurity profiles is provided with every shipment to guarantee traceability and 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 nature, the container must be kept tightly sealed after opening to prevent moisture absorption, which can affect product stability and performance.

Specification

Item	Specification
Appearance	Dark brown to black powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Moisture Content	≤ 5.0%
Sulfated Ash	≤ 1.0%
Water Solubility	Freely soluble

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