Description

3-[[4-[(4-Amino-5-Methoxy-2-Methylphenyl)Azo]Phenyl]Azo]Benzenesulfonic Acid Sodium Salt is a high-purity, water-soluble azo dye intermediate of significant commercial importance. Its primary value lies in its role as a versatile precursor for synthesizing a range of specialized dyes and pigments, offering excellent color properties and structural stability. This compound is essential for manufacturers in the textile, ink, and specialty chemical industries seeking to develop high-performance colorants.

Application

• Primary Intermediate for Azo Dyes: Key building block for the synthesis of acid dyes, direct dyes, and other azo-based colorants.
• Textile Dyeing: Used in the production of dyes for coloring natural and synthetic fibers like wool, silk, and nylon.
• Ink Manufacturing: Serves as a precursor for pigments used in printing inks, including inks for packaging and textiles.
• Paper Coloring: Employed in the manufacture of dyes for specialty paper products.
• Leather Dyeing: Used to produce dyes for the leather tanning and finishing industry.
• Research & Development: A valuable chemical for R&D laboratories focusing on novel dye synthesis and material science.
• Biological Staining: Potential use as an intermediate for histochemical stains and indicators in life sciences.

Basic Information

Product Name	3-[[4-[(4-Amino-5-Methoxy-2-Methylphenyl)Azo]Phenyl]Azo]Benzenesulfonic Acid Sodium Salt
CAS No.	127090-21-5
Molecular Formula	C20H18N5NaO4S
Molecular Weight	447.44 g/mol
Synonyms	Benzenesulfonic acid, 3-[[4-[(4-amino-5-methoxy-2-methylphenyl)azo]phenyl]azo]-, sodium salt (1:1); Sodium 3-[[4-[(4-amino-5-methoxy-2-methylphenyl)diazenyl]phenyl]diazenyl]benzenesulfonate; Azo dye intermediate 127090-21-5; Acid Black 210 intermediate (related); Direct Black 22 intermediate (related); C.I. 30027 (related index); 4-Amino-5-methoxy-2-methylazobenzene-4'-azobenzenesulfonic acid sodium salt
EINECS	Contact for details

Quality Control

Our production of 3-[[4-[(4-Amino-5-Methoxy-2-Methylphenyl)Azo]Phenyl]Azo]Benzenesulfonic Acid Sodium Salt adheres to stringent quality management protocols. Every batch undergoes comprehensive analytical testing, including HPLC for purity and identity confirmation, to ensure consistency and meet precise customer specifications. Certificates of Analysis (COA) documenting all critical parameters are provided with each shipment to guarantee traceability and compliance.

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 tightly sealed to prevent absorption of atmospheric moisture.

Specification

Item	Specification
Appearance	Dark brown to reddish-brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 5.0%
Heavy Metals (as Pb)	≤ 20 ppm
Water Solubility	Freely soluble

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