Description

4,4'-[[2,4-Dihydroxy-5-[(4-Sulfophenyl)Azo]-1,3-Phenylene]Bis(Azo)]Bis(1-Naphthalenesulfonic Acid)Trisodium Salt is a high-purity, water-soluble azo dye intermediate of significant industrial importance. Its complex polyazo structure is engineered to deliver exceptional color strength and specific hue properties for demanding applications. This compound is a critical raw material for manufacturers in the textile, ink, and specialty coatings sectors who require consistent, high-performance chromophores. We supply this intermediate with a focus on batch-to-batch uniformity and reliable global logistics.

Application

• Primary Intermediate for Textile Dyes: Used in the synthesis of direct, acid, and reactive dyes for coloring cotton, wool, silk, and nylon fibers.
• Inkjet and Printing Inks: Serves as a key pigment precursor for producing high-quality inks requiring specific color fastness and solubility profiles.
• Paper Coloring: Employed in the manufacture of dyes for specialty papers and paper products.
• Leather Dyeing: Used in formulations for dyeing leather goods, providing rich and durable colors.
• Biological Staining: Potential use as a starting material for certain histological or cytological stains in laboratory settings.
• Research & Development: Supplied to chemical R&D laboratories for the development of new polymeric dyes and functional colorants.

Basic Information

Product Name	4,4'-[[2,4-Dihydroxy-5-[(4-Sulfophenyl)Azo]-1,3-Phenylene]Bis(Azo)]Bis(1-Naphthalenesulfonic Acid)Trisodium Salt
CAS No.	68877-39-4
Molecular Formula	C34H21N6Na3O13S3
Molecular Weight	910.72 g/mol (approx.)
Synonyms	Trisodium 4,4'-[[2,4-dihydroxy-5-[(4-sulfophenyl)azo]-1,3-phenylene]bis(azo)]di(1-naphthalenesulfonate); C.I. Direct Brown 1:1; Direct Brown 1:1; Polyazo Brown Dye Intermediate; 4,4'-[2,4-Dihydroxy-5-(4-sulfophenylazo)-m-phenylene bis(azo)]di(1-naphthalenesulfonic acid) trisodium salt; Azo Dye Intermediate Brown; [2,4-Dihydroxy-5-[(4-sulfophenyl)azo]-1,3-phenylene]bis[azo-4,1-naphthalenedisulfonic acid] trisodium salt
EINECS	Contact for details

Quality Control

Our production of 4,4'-[[2,4-Dihydroxy-5-[(4-Sulfophenyl)Azo]-1,3-Phenylene]Bis(Azo)]Bis(1-Naphthalenesulfonic Acid)Trisodium Salt adheres to a strict quality management system to ensure product integrity and performance consistency. Every batch is analyzed using advanced techniques including HPLC and spectrophotometry to confirm identity, purity, and colorimetric properties. Certificates of Analysis (COA) detailing all relevant specifications are provided with each shipment. Our quality commitment supports compliance with industry standards for dye intermediates.

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); keep the container tightly sealed when not in use to prevent absorption of atmospheric moisture. Keep away from strong oxidizing agents.

Specification

Item	Specification
Appearance	Dark brown to reddish-brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Moisture Content (KF)	≤ 5.0%
Ash Content (Sulfated)	≤ 20.0%
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.