Description

Trisodium 2,4-Dihydroxy-3,5-Bis[(4-Sulphonatophenyl)Azo]Benzenesulphonate is a high-purity, water-soluble azo dye intermediate of significant industrial importance. This compound is valued for its role in synthesizing vibrant and stable colorants, particularly for demanding applications requiring excellent light and wash fastness. It is primarily needed by manufacturers in the textile dyeing, ink formulation, and specialty paper coloring industries seeking reliable and consistent color precursors.

Application

• Primary Intermediate for Reactive Dyes: A key building block in the synthesis of high-performance reactive dyes for cotton and other cellulosic fibers.
• Textile Dyeing and Printing: Used in the production of dyes for exhaust, continuous, and printing processes, offering bright shades.
• Ink Manufacturing: Serves as a colorant precursor in the formulation of inks for jet printing, packaging, and security applications.
• Paper Coloring: Employed in the production of dyes for coloring paper and paperboard.
• Leather Dyeing: Utilized in the formulation of dyes for the leather tanning and finishing industry.
• Research & Development: Acts as a standard or starting material in chemical research for developing new chromophores and functional dyes.

Basic Information

Item	Detail
Product Name	Trisodium 2,4-Dihydroxy-3,5-Bis[(4-Sulphonatophenyl)Azo]Benzenesulphonate
CAS No.	25807-51-6
Molecular Formula	C24H13N4Na3O11S3
Molecular Weight	722.52 g/mol
Synonyms	Acid Orange 67; C.I. 14172; Trisodium 4-hydroxy-3-[(E)-2-(4-sulfonatophenyl)diazen-1-yl]-5-[(E)-2-[4-(sodiumsulfonyl)phenyl]diazen-1-yl]benzene-1,2-disulfonate; 2,4-Dihydroxy-3,5-bis[(4-sulfophenyl)azo]benzenesulfonic acid trisodium salt; Benzenesulfonic acid, 2,4-dihydroxy-3,5-bis[(4-sulfophenyl)azo]-, trisodium salt; Trisodium 2,4-dihydroxy-3,5-bis(p-sulfophenylazo)benzenesulfonate
EINECS	Contact for details

Quality Control

Our production of Trisodium 2,4-Dihydroxy-3,5-Bis[(4-Sulphonatophenyl)Azo]Benzenesulphonate adheres to stringent quality management protocols. Every batch undergoes rigorous analytical testing to ensure consistent purity, color strength, and compliance with industry specifications. A comprehensive Certificate of Analysis (COA) detailing assay, impurity profile, and physical parameters is available upon request to support your quality assurance processes.

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	Orange to reddish-brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Moisture (Karl Fischer)	≤ 5.0%
Water Solubility	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.