Description

5-[[4-[[4-[(7-Amino-1-Hydroxy-3-Sulfo-2-Naphthalenyl)Azo]-7-Sulfo-1-Naphthalenyl]Azo]Phenyl]Azo]-2-Hydroxybenzoic Acid Trisodium Salt is a high-purity, multi-sulfonated azo dye intermediate of significant industrial importance. Its complex polyazo structure with multiple sulfonate groups provides excellent water solubility and strong chromophoric properties, making it a critical precursor for high-performance dyes. This compound is essential for manufacturers in the textile, ink, and specialty chemical sectors requiring advanced colorants with specific fastness and hue characteristics.

Application

• Primary Intermediate for Reactive Dyes: A key building block in the synthesis of high-grade reactive dyes for cotton and other cellulosic fibers, offering brilliant shades and excellent wash-fastness.
• Production of Acid Dyes: Used in manufacturing acid dyes for wool, silk, and nylon, providing strong, vibrant colors with good leveling properties.
• Specialty Ink Formulations: Serves as a colorant precursor in high-quality inkjet inks and other specialty printing inks where color intensity and stability are paramount.
• Functional Dye Synthesis: A valuable intermediate for creating functional dyes used in biological staining, sensors, and other advanced material applications.
• Research & Development: Employed in chemical R&D for developing novel chromophores and studying structure-property relationships in dye chemistry.

Basic Information

Item	Details
Product Name	5-[[4-[[4-[(7-Amino-1-Hydroxy-3-Sulfo-2-Naphthalenyl)Azo]-7-Sulfo-1-Naphthalenyl]Azo]Phenyl]Azo]-2-Hydroxybenzoic Acid Trisodium Salt
CAS No.	71393-86-7
Molecular Formula	C33H21N7O11S2·3Na
Molecular Weight	Contact for details
Synonyms	Trisodium 5-({4-[(E)-{4-[(E)-(7-amino-1-hydroxy-3-sulfonatonaphthalen-2-yl)diazenyl]-7-sulfonatonaphthalen-1-yl}diazenyl]phenyl}diazenyl)-2-hydroxybenzoate; Polyazo dye intermediate (sulfonated); CI Acid Red (related derivatives); Reactive Dye Intermediate; Sulfonated polyazo compound; Azo dye precursor, trisodium salt; 2-Hydroxy-5-[[4-[[4-[(7-amino-1-hydroxy-3-sulfo-2-naphthyl)azo]-7-sulfo-1-naphthyl]azo]phenyl]azo]benzoic acid trisodium salt
EINECS	Contact for details

Quality Control

Our production of this advanced dye intermediate adheres to stringent quality control protocols to ensure batch-to-batch consistency and high chemical purity. Quality is verified through modern analytical techniques including HPLC, UV-Vis spectroscopy, and titration methods. A comprehensive Certificate of Analysis (COA) detailing purity, identity, and impurity profiles is provided with every shipment to support your quality assurance and regulatory needs.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at a controlled room temperature (15-25°C). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept tightly sealed after opening to prevent absorption of atmospheric moisture, which can affect product performance and handling.

Specification

Item	Specification
Appearance	Dark colored powder or solid
Identification (IR)	Conforms to structure
Assay (HPLC)	Min. 95%
Moisture Content	Max. 5.0%
Water Solubility	Freely soluble
Heavy Metals (as Pb)	Max. 20 ppm

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