Description

4,4'-[Carbonylbis[Imino(3-Methoxy-4,1-Phenylene)Azo]]Bis(Benzenesulfonic Acid Sodium) Salt is a high-purity, water-soluble azo dye intermediate of significant commercial importance. Its value lies in its role as a key precursor for synthesizing reactive and direct dyes, offering excellent chromophore properties and stability. This compound is essential for manufacturers in the textile, leather, and specialty ink industries seeking to produce vivid and durable colorants.

Application

• Primary Intermediate for Dye Synthesis: Acts as a crucial building block for manufacturing reactive, direct, and acid dyes, particularly for cotton, wool, and nylon.
• Textile Dyeing and Printing: Used in formulations for dyeing fabrics and in printing inks to achieve specific shades of yellow, orange, and red hues with good light and wash fastness.
• Leather Coloring: Employed in the production of dyes for coloring leather goods, providing deep, uniform penetration and color stability.
• Paper and Pulp Coloring: Suitable for specialty paper dyes where water solubility and color intensity are required.
• Research & Development: Serves as a standard or experimental compound in R&D labs for developing new polymeric dyes and colorimetric sensors.
• Industrial Ink Formulation: Used in the formulation of inks for non-impact printing and other industrial marking applications.

Basic Information

Item	Detail
Product Name	4,4'-[Carbonylbis[Imino(3-Methoxy-4,1-Phenylene)Azo]]Bis(Benzenesulfonic Acid Sodium) Salt
CAS No.	71850-83-4
Molecular Formula	C29H24N6Na2O10S2
Molecular Weight	750.65 g/mol
Synonyms	Direct Yellow 142 (Parent Dye Acid); Benzenesulfonic acid, 4,4'-[carbonylbis[imino(3-methoxy-4,1-phenylene)azo]]bis-, disodium salt; C.I. 13940; Disodium 4,4'-[carbonylbis(imino-3-methoxy-4,1-phenyleneazo)]dibenzenesulphonate; Azo dye intermediate 71850-83-4; Sodium 4,4'-[carbonylbis[imino(3-methoxy-4,1-phenylene)azo]]dibenzenesulfonate
EINECS	Contact for details

Quality Control

Our production of 4,4'-[Carbonylbis[Imino(3-Methoxy-4,1-Phenylene)Azo]]Bis(Benzenesulfonic Acid Sodium) Salt adheres to stringent quality management protocols. Every batch undergoes rigorous analytical testing, including HPLC for purity and identity confirmation, to ensure consistency and compliance with customer specifications. A comprehensive Certificate of Analysis (COA) detailing assay, impurity profile, and physical properties is 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 product performance and handling.

Specification

Item	Specification
Appearance	Yellow to Orange-Red Powder
Identification (IR)	Conforms to Standard
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.