Description

4-Amino-3-[(2-Chlorophenyl)Azo]-5-Hydroxy-6-[[4-[[2-(Sulfooxy)Ethyl]Sulfonyl]Phenyl]Azo]-2,7-Naphthalenedisulfonic Acid Trisodium Salt is a high-purity, water-soluble azo dye intermediate of significant industrial importance. Its complex molecular structure, featuring multiple sulfonic acid groups, provides excellent solubility and substantivity, making it a critical precursor for synthesizing specialized dyes and pigments. This compound is essential for manufacturers in the textile, ink, and specialty chemical sectors who require consistent quality and reliable supply for producing vibrant, colorfast products.

Application

• Primary Intermediate for Reactive Dyes: A key building block in the synthesis of high-performance reactive dyes for cotton, wool, and nylon fibers.
• Specialty Ink Formulation: Used in the production of pigments for inks in digital textile printing and other advanced printing applications.
• Functional Dye Synthesis: Serves as a precursor for dyes used in biological staining, pH indicators, and other analytical reagents.
• Research & Development: Employed in chemical R&D for creating novel chromophores with specific light-absorption properties.

Basic Information

Product Name	4-Amino-3-[(2-Chlorophenyl)Azo]-5-Hydroxy-6-[[4-[[2-(Sulfooxy)Ethyl]Sulfonyl]Phenyl]Azo]-2,7-Naphthalenedisulfonic Acid Trisodium Salt
CAS No.	73157-54-7
Molecular Formula	C24H17ClN6Na3O14S4
Molecular Weight	879.11 g/mol
Synonyms	Reactive Dye Intermediate 73157-54-7; Trisodium 4-amino-3-[(2-chlorophenyl)diazenyl]-5-hydroxy-6-[[4-[(2-sulfooxyethyl)sulfonyl]phenyl]diazenyl]naphthalene-2,7-disulfonate; C.I. Reactive Black 5 Intermediate; Azo Dye Precursor 73157-54-7; 2,7-Naphthalenedisulfonic acid, 4-amino-3-[(2-chlorophenyl)azo]-5-hydroxy-6-[[4-[[2-(sulfooxy)ethyl]sulfonyl]phenyl]azo]-, trisodium salt
EINECS	Contact for details

Quality Control

Our production of this advanced dye intermediate adheres to strict quality management protocols. Every batch is analyzed to ensure high purity and consistency, with specifications typically covering identity, assay, and impurity profiles. Certificates of Analysis (COA) documenting results from HPLC, spectrophotometry, and other relevant tests are provided to guarantee the material meets your technical requirements.

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 purity and performance.

Specification

Item	Specification
Appearance	Dark blue to black powder or solid
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Water Content	≤ 5.0%
Solubility (in Water)	Clear solution
Heavy Metals (as Pb)	≤ 20 ppm

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