Description

3-[[4-[(4-Amino-7-Sulpho-1-Naphthyl)Azo]-7-Sulpho-1-Naphthyl]Azo]Naphthalene-1,5-Disulphonic Acid, Sodium Salt is a high-purity, water-soluble azo dye intermediate of significant commercial importance. Its complex, multi-sulfonated structure provides excellent substantivity and chromophoric properties, making it a critical precursor for synthesizing high-value dyes and pigments. This compound is essential for manufacturers in the textile, ink, and specialty chemical industries seeking to produce vibrant, wash-fast colors.

Application

• Primary Intermediate for Reactive Dyes: A key building block in the synthesis of high-performance reactive dyes for cotton and other cellulosic fibers.
• Direct Dye Manufacturing: Used in the production of direct dyes, particularly for applications requiring deep, intense shades with good solubility.
• Specialty Ink Formulations: Serves as a colorant intermediate in the manufacture of inks for digital textile printing and other high-resolution applications.
• Liquid Dye Concentrates: Ideal for creating stable, concentrated liquid dye formulations due to its excellent water solubility.
• Research & Development: Employed in chemical R&D for developing novel chromophores and studying azo dye chemistry and properties.
• Analytical Chemistry: Can be used as a standard or reagent in analytical methods for dye identification and quantification.

Basic Information

Product Name	3-[[4-[(4-Amino-7-Sulpho-1-Naphthyl)Azo]-7-Sulpho-1-Naphthyl]Azo]Naphthalene-1,5-Disulphonic Acid, Sodium Salt
CAS No.	93858-03-8
Molecular Formula	C30H18N6O12S4 • xNa
Molecular Weight	Contact for details
Synonyms	3-[[4-[(4-Amino-7-sulfo-1-naphthyl)azo]-7-sulfo-1-naphthyl]azo]naphthalene-1,5-disulfonic acid sodium salt; Trisazo dye intermediate; C.I. Direct Brown 1:1; Acid Brown 1:1; Sodium 3-[[4-[(4-amino-7-sulfonaphthalen-1-yl)diazenyl]-7-sulfonaphthalen-1-yl]diazenyl]naphthalene-1,5-disulfonate; 93858-03-8; Azo dye intermediate (multi-sulfonated)
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 purity. Every lot is analyzed using advanced techniques like HPLC and spectrophotometry to confirm identity, strength, and impurity profiles. A comprehensive Certificate of Analysis (COA) detailing purity, assay, and specific tests 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 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 product stability and handling properties.

Specification

Item	Specification
Appearance	Dark brown to black powder or granules
Identification (IR)	Conforms to structure
Assay (HPLC)	Min. 95%
Moisture Content	Max. 5.0%
Water Solubility	Completely soluble
Heavy Metals (as Pb)	Max. 20 ppm
Related Substances (HPLC)	Total impurities: Max. 5.0%

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