Description

Tetrasodium 4-Amino-5-Hydroxy-6-[(1-Sulphonato-2-Naphthyl)Azo]-3-[[4-[[2-(Sulphonatooxy)Ethyl]Sulphonyl]Phenyl]Azo]Naphthalene-2,7-Disulphonate is a high-purity, water-soluble azo dye intermediate of significant industrial importance. This compound is valued for its ability to impart a strong, stable color and its role as a key precursor in the synthesis of advanced reactive and direct dyes. It is primarily required by manufacturers in the textile, ink, and specialty chemical industries seeking to produce vibrant and durable colorants.

Application

• Primary Intermediate for Reactive Dyes: A critical building block in the synthesis of high-performance reactive dyes used for coloring cotton, viscose, and other cellulosic fibers.
• Direct Dye Production: Used in the manufacture of direct dyes for applications on paper, leather, and textiles where high affinity is required.
• Specialty Ink Formulations: Serves as a key colorant component in the production of inks for digital textile printing and other high-value printing applications.
• Functional Dye Synthesis: Acts as a precursor for dyes used in non-textile applications, such as lasers, optical data storage, and biomedical staining.
• Research & Development: Utilized in chemical R&D for developing novel chromophores and studying structure-property relationships in dye chemistry.

Basic Information

Item	Details
Product Name	Tetrasodium 4-Amino-5-Hydroxy-6-[(1-Sulphonato-2-Naphthyl)Azo]-3-[[4-[[2-(Sulphonatooxy)Ethyl]Sulphonyl]Phenyl]Azo]Naphthalene-2,7-Disulphonate
CAS No.	84083-11-4
Molecular Formula	C34H22N6Na4O19S5
Molecular Weight	Contact for details
Synonyms	Reactive Black 5 Precursor; Tetrasodium 6-Amino-4-hydroxy-3-[[4-[[2-(sulfonatooxy)ethyl]sulfonyl]phenyl]azo]-5-[(2-sulfonatonaphthalen-1-yl)azo]naphthalene-2,7-disulfonate; C.I. Reactive Black 5 Intermediate; Azo Dye Intermediate 84083-11-4; 4-Amino-5-hydroxy-6-[(1-sulphonato-2-naphthyl)azo]-3-[[4-[[2-(sulphonatooxy)ethyl]sulphonyl]phenyl]azo]naphthalene-2,7-disulphonic acid tetrasodium salt
EINECS	Contact for details

Quality Control

Our production of this dye intermediate adheres to strict quality management systems to ensure batch-to-batch consistency and high purity. Every lot is tested against stringent in-house specifications, which typically include parameters for assay (HPLC), identification (IR/UV-Vis), and impurity profile. A comprehensive Certificate of Analysis (COA) detailing all test results is provided with each shipment to support your quality assurance protocols.

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 (moisture-sensitive) nature, the container must be kept sealed to prevent absorption of atmospheric moisture, which can affect product performance.

Specification

Item	Specification
Appearance	Dark blue to black powder or granules
Identification (IR)	Conforms to reference spectrum
Assay (HPLC)	Min. 95%
Moisture Content	Max. 5.0%
Water Solubility	Completely 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.