Description

Trisodium 8-[[4-[(4-Aminophenyl)Azo]-6-Sulphonatonaphthyl]Azo]-5-[(2-Hydroxy-7-Sulphonatonaphthyl)Azo]Naphthalene-2-Sulphonate is a high-purity, water-soluble azo dye intermediate of significant commercial importance. Its complex polyazo structure is engineered to deliver exceptional color strength and specific hue properties for advanced dye synthesis. This product is essential for manufacturers requiring precise and reliable intermediates for producing high-performance dyes and pigments used in textiles, inks, and specialty coatings.

Application

• Primary Intermediate for Reactive Dyes: Key building block in the synthesis of high-grade reactive dyes for cotton and cellulose fiber dyeing.
• Direct Dye Production: Used in the manufacture of direct dyes for paper, leather, and textile applications requiring good wet fastness.
• Specialty Pigment Synthesis: Serves as a precursor for creating complex organic pigments used in high-quality inks and coatings.
• Research & Development: A valuable compound for R&D laboratories developing new chromophores and colorants with specific lightfastness and solubility properties.
• Functional Dye Manufacturing: Potential use in the production of dyes for non-textile applications, such as in lasers or optical data storage.

Basic Information

Product Name	Trisodium 8-[[4-[(4-Aminophenyl)Azo]-6-Sulphonatonaphthyl]Azo]-5-[(2-Hydroxy-7-Sulphonatonaphthyl)Azo]Naphthalene-2-Sulphonate
CAS No.	68227-44-1
Molecular Formula	C42H24N6Na3O13S3
Molecular Weight	~994.82 g/mol
Synonyms	Reactive Black 5 Intermediate; Polyazo Dye Intermediate; Trisodium 1-amino-4-[4-[(2-hydroxy-1-naphthyl)azo]-7-sulfo-1-naphthyl]azo-5-[4-[(4-aminophenyl)azo]-6-sulfo-1-naphthyl]azo-2,7-naphthalenedisulfonate; C.I. Reactive Black 5 precursor; Azo Dye CAS 68227-44-1; Tetrasodium salt variant may exist; 8-[[4-[(4-Aminophenyl)azo]-6-sulfo-1-naphthyl]azo]-5-[(2-hydroxy-7-sulfo-1-naphthyl)azo]-2,7-naphthalenedisulfonic acid trisodium salt
EINECS	Contact for details

Quality Control

Our production of Trisodium 8-[[4-[(4-Aminophenyl)Azo]-6-Sulphonatonaphthyl]Azo]-5-[(2-Hydroxy-7-Sulphonatonaphthyl)Azo]Naphthalene-2-Sulphonate adheres to stringent quality management protocols. Every batch undergoes comprehensive analytical testing, including HPLC for purity and isomer content, spectrophotometry for color value, and titration for active moiety, ensuring consistency and performance for your downstream synthesis. Certificates of Analysis (COA) detailing all specifications are provided with each shipment.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at a controlled room temperature (15-25°C). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept sealed when not in use to prevent absorption of atmospheric moisture, which can affect purity and handling properties.

Specification

Item	Specification
Appearance	Dark blue to black powder or granules
Identification (IR)	Conforms to structure
Assay (HPLC)	Min. 95%
Moisture Content (KF)	Max. 5.0%
Sulfated Ash	20 - 30%
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.