Description

Disodium 4-Amino-3-[[4'-[(2,4-Diaminophenyl)Azo]-3,3'-Dimethoxy[1,1'-Biphenyl]-4-Yl]Azo]-5-Hydroxy-6-(Phenylazo)Naphthalene-2,7-Disulphonate is a high-purity, polyazo dye intermediate of significant industrial importance. This compound is valued for its ability to impart deep, complex shades and its role in synthesizing specialized colorants. It is primarily required by manufacturers in the textile, leather, and specialty ink industries for producing high-performance dyes and pigments.

Application

• Primary application in the synthesis of high-grade, complex azo dyes for textiles like cotton, wool, and silk.
• Manufacturing of leather dyes requiring excellent color fastness and depth.
• Production of specialty inks, including those for security printing and high-resolution applications.
• Used as a key intermediate for paper colorants and specialty coatings.
• Potential use in the research and development of functional dyes for non-textile applications.
• Serves as a reference standard in analytical and quality control laboratories for dye identification.

Basic Information

Product Name	Disodium 4-Amino-3-[[4'-[(2,4-Diaminophenyl)Azo]-3,3'-Dimethoxy[1,1'-Biphenyl]-4-Yl]Azo]-5-Hydroxy-6-(Phenylazo)Naphthalene-2,7-Disulphonate
CAS No.	38449-92-2
Molecular Formula	C46H34N10Na2O10S2
Molecular Weight	989.92 g/mol
Synonyms	Direct Black 38 (disodium salt); C.I. 30235; Pontamine Black E; Azo Black; 4-Amino-3-[[4'-[(2,4-diaminophenyl)azo]-3,3'-dimethoxy[1,1'-biphenyl]-4-yl]azo]-5-hydroxy-6-(phenylazo)-2,7-naphthalenedisulfonic acid, disodium salt; Benzenesulfonic acid, 4-amino-3-[[4'-[(2,4-diaminophenyl)azo]-3,3'-dimethoxy[1,1'-biphenyl]-4-yl]azo]-5-hydroxy-6-(phenylazo)-2,7-, disodium salt
EINECS	Contact for details

Quality Control

Our products undergo rigorous quality testing to ensure compliance with industry standards. Every batch is controlled against strict specifications for identity, purity, and impurity profiles. Certificates of Analysis (COA) are available upon request, detailing results from advanced analytical techniques. We adhere to a robust quality management system to guarantee batch-to-batch consistency and supply reliability for our global B2B clients.

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 nature, the container must be kept tightly sealed to prevent moisture absorption, which can affect product stability and performance.

Specification

Item	Specification
Appearance	Dark brown to black powder
Identification (IR)	Conforms to structure
Assay (HPLC)	Min. 95%
Moisture (KF)	Max. 5.0%
Sulfated Ash	Max. 20.0%
Heavy Metals (as Pb)	Max. 20 ppm
Solubility (in Water)	Freely soluble

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