Description

7-Hydroxy-8-[[3,4'-Bis(Sodiooxysulfonyl)Azobenzene-4-Yl]Azo]-1,3,6-Naphthalenetrisulfonic Acid Trisodium Salt is a high-purity, water-soluble azo dye intermediate of significant commercial importance. This compound is valued for its ability to impart vivid and stable color properties in demanding industrial applications. It is primarily sought by manufacturers in the textile, ink, and specialty chemical sectors for the synthesis of advanced dyes and pigments.

Application

• Primary Intermediate for Reactive Dyes: A key building block in the synthesis of high-performance reactive dyes for cotton and other cellulosic fibers.
• Textile Dyeing and Printing: Used in formulations for textile printing inks and dye baths, offering excellent wash and light fastness.
• Specialty Ink Production: Employed in the manufacture of inks for inkjet, packaging, and security printing applications.
• Paper Coloring: Suitable for the coloration of specialty papers and paper products.
• Leather Dyeing: Used in the formulation of dyes for the leather tanning and finishing industry.
• Liquid Crystal Display (LCD) Color Filters: Potential application in the production of color filters for electronic displays due to its chromophoric properties.
• Biological Staining: May serve as a precursor for histochemical stains and indicators in laboratory settings.

Basic Information

Product Name	7-Hydroxy-8-[[3,4'-Bis(Sodiooxysulfonyl)Azobenzene-4-Yl]Azo]-1,3,6-Naphthalenetrisulfonic Acid Trisodium Salt
CAS No.	6226-91-1
Molecular Formula	C26H14N4Na3O16S5
Molecular Weight	884.69 g/mol
Synonyms	Reactive Black 5 Precursor; C.I. Reactive Black 5 Intermediate; 1,3,6-Naphthalenetrisulfonic acid, 7-hydroxy-8-((3,4'-disulfo(1,1'-azobenzene)-4-yl)azo)-, trisodium salt; Trisodium 7-hydroxy-8-[(E)-[4-[(E)-(3-sulfonato-4-sulfophenyl)diazenyl]phenyl]diazenyl]naphthalene-1,3,6-trisulfonate; Reactive Dye Intermediate 6226-91-1; Azo Dye Intermediate Black 5; 4-Amino-5-hydroxy-2,7-naphthalenedisulfonic acid coupled diazo derivative
EINECS	Contact for details

Quality Control

Our production of this dye intermediate adheres to stringent quality control protocols to ensure batch-to-batch consistency and high chemical purity. 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 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). Due to its hygroscopic nature, the container must be kept tightly sealed to prevent moisture absorption, which can affect product stability and performance.

Specification

Item	Specification
Appearance	Dark blue to black powder or granules
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Moisture Content	≤ 5.0%
Water Solubility	Complete, clear solution
Heavy Metals (as Pb)	≤ 20 ppm
pH (1% Solution)	7.0 - 9.0

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