Description

Disodium 5,5'-[(1,4-Dioxobut-2-Ene-1,4-Diyl)Bis(Imino-p-Phenyleneazo)]Disalicylate is a high-purity, water-soluble azo dye intermediate with a complex disalicylate structure. This compound is valued for its ability to impart vivid color and act as a key building block in the synthesis of specialized dyes and pigments. It is essential for manufacturers in the textile, ink, and specialty chemical industries requiring precise colorants and functional intermediates.

Application

• Textile Dyeing: A critical intermediate for synthesizing reactive and direct dyes for cotton, wool, and synthetic fibers.
• Ink Manufacturing: Used in the production of high-performance pigments for printing inks, including inks for packaging and textiles.
• Functional Dyes: Serves as a precursor for dyes used in biological staining, laser applications, and optical data storage.
• Research & Development: Employed in academic and industrial R&D labs for developing novel chromophores and studying azo dye chemistry.
• Specialty Coatings: A component in formulating colored coatings and paints where specific light-fastness and solubility properties are required.

Basic Information

Item	Detail
Product Name	Disodium 5,5'-[(1,4-Dioxobut-2-Ene-1,4-Diyl)Bis(Imino-p-Phenyleneazo)]Disalicylate
CAS No.	72139-21-0
Molecular Formula	C30H20N4Na2O10
Molecular Weight	642.48 g/mol
Synonyms	Disodium 5,5'-[1,4-Dioxobut-2-ene-1,4-diylbis(imino-p-phenylenazo)]disalicylate; C.I. Reactive Red 198 (related class); Azo Dye Intermediate 72139-21-0; Disalicylate Azo Dye Sodium Salt; 5,5'-[1,4-Dioxobut-2-ene-1,4-diylbis(imino-p-phenylenazo)]disalicylic Acid Disodium Salt; Bis-azo Disalicylate; Textile Dye Intermediate 72139-21-0
EINECS	Contact for details

Quality Control

Our Disodium 5,5'-[(1,4-Dioxobut-2-Ene-1,4-Diyl)Bis(Imino-p-Phenyleneazo)]Disalicylate is produced under strict quality management systems. Every batch undergoes rigorous analytical testing, including HPLC for purity and identity confirmation, to ensure it meets precise customer specifications and industry standards. Certificates of Analysis (COA) documenting all critical parameters are available upon request.

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.

Specification

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

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