Description

5-[[4-[[8-[[(3-Carboxy-4-hydroxyphenyl)sulfonyl]amino]-1-hydroxy-3,6-disulfo-2-naphthalenyl]azo]-3-ethoxy-7-sulfo-1-naphthalenyl]azo]-2-hydroxy-3-sulfobenzoic acid hexasodium salt is a high-purity, water-soluble polyazo dye intermediate of significant industrial importance. This compound is valued for its complex molecular structure, which provides multiple reactive sites for creating vivid and stable colorants. It is primarily sought after by manufacturers in the specialty chemicals sector for the synthesis of advanced dyes and pigments. Its consistent quality and performance are critical for end-products requiring high color strength and durability.

Application

• Primary Intermediate for Reactive Dyes: A key building block in the synthesis of high-grade reactive dyes for textile coloring, particularly for cotton and other cellulose fibers.
• Production of Acid Dyes: Used in manufacturing acid dyes for wool, silk, and nylon, offering excellent wash and light fastness.
• Specialty Pigment Synthesis: Serves as a precursor for creating complex organic pigments used in inks, coatings, and plastics.
• Laboratory Research & Development: Employed in R&D settings for developing new chromophores and studying azo dye chemistry and properties.
• Functional Dye Manufacturing: Potential use in the production of dyes for specialized applications, such as in biological staining or as pH indicators.

Basic Information

Product Name	5-[[4-[[8-[[(3-Carboxy-4-hydroxyphenyl)sulfonyl]amino]-1-hydroxy-3,6-disulfo-2-naphthalenyl]azo]-3-ethoxy-7-sulfo-1-naphthalenyl]azo]-2-hydroxy-3-sulfobenzoic acid hexasodium salt
CAS No.	72379-56-7
Molecular Formula	C35H19N5Na6O23S6
Molecular Weight	Contact for details
Synonyms	Hexasodium 5-[[4-[[8-[[(3-carboxy-4-hydroxyphenyl)sulfonyl]amino]-1-hydroxy-3,6-disulfo-2-naphthalenyl]azo]-3-ethoxy-7-sulfo-1-naphthalenyl]azo]-2-hydroxy-3-sulfobenzoate; C.I. Reactive Black 5 intermediate; Polyazo dye intermediate; Reactive dye precursor; Tetrasulfonated azo dye salt; Benzenesulfonic acid, 5-[[4-[[8-[[(3-carboxy-4-hydroxyphenyl)sulfonyl]amino]-1-hydroxy-3,6-disulfo-2-naphthalenyl]azo]-3-ethoxy-7-sulfo-1-naphthalenyl]azo]-2-hydroxy-, hexasodium salt
EINECS	Contact for details

Quality Control

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

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 material is hygroscopic (moisture-sensitive); the container must be kept tightly sealed to prevent absorption of atmospheric moisture, which can affect product quality and handling properties.

Specification

Item	Specification
Appearance	Dark powder or solid
Identification (IR)	Conforms to structure
Purity (HPLC)	≥ 95% (Typical)
Water Content	≤ 5.0%
Sulfated Ash	Contact for details
Heavy Metals (as Pb)	≤ 20 ppm

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