Description

4-Amino-3,6-Bis[[4-[(2,4-Diamino-5-Sulfophenyl)Azo]Phenyl]Azo]-5-Hydroxy-2,7-Naphthalenedisulfonic Acid Tetrasodium Salt is a high-purity, water-soluble polyazo dye intermediate. This compound is valued for its ability to impart deep, stable colors and its reactivity as a key building block in the synthesis of complex dyes. It is primarily required by manufacturers in the textile, ink, and specialty chemical industries for producing high-performance dyes and pigments.

Application

• Primary Intermediate for Textile Dyes: Used in the synthesis of direct, reactive, and acid dyes for coloring cotton, wool, silk, and nylon.
• Inkjet Ink Formulation: Serves as a critical colorant component in the production of high-quality pigment-based inks for industrial and commercial printing.
• Specialty Pigment Manufacturing: Acts as a precursor in creating complex organic pigments used in plastics, coatings, and automotive paints.
• Biological Staining Agent: Employed in the development of histological stains for microscopy and diagnostic applications in life sciences.
• Paper Coloring: Utilized in the manufacturing of dyed papers and paper products requiring specific, lightfast colors.
• Research & Development: Serves as a standard or reagent in chemical research focused on azo chemistry and dye synthesis.

Basic Information

Product Name	4-Amino-3,6-Bis[[4-[(2,4-Diamino-5-Sulfophenyl)Azo]Phenyl]Azo]-5-Hydroxy-2,7-Naphthalenedisulfonic Acid Tetrasodium Salt
CAS No.	72927-74-3
Molecular Formula	C34H22N12Na4O16S4
Molecular Weight	Contact for details
Synonyms	Acid Black 234; C.I. 31741; Tetrasodium 4-amino-3,6-bis[[4-[(2,4-diamino-5-sulfophenyl)azo]phenyl]azo]-5-hydroxy-2,7-naphthalenedisulfonate; 4-Amino-3,6-bis({4-[(2,4-diamino-5-sulfophenyl)diazenyl]phenyl}diazenyl)-5-hydroxynaphthalene-2,7-disulfonic acid tetrasodium salt; Polyazo Black Dye Intermediate; Azo Dye Intermediate 72927-74-3
EINECS	Contact for details

Quality Control

Our production of 4-Amino-3,6-Bis[[4-[(2,4-Diamino-5-Sulfophenyl)Azo]Phenyl]Azo]-5-Hydroxy-2,7-Naphthalenedisulfonic Acid Tetrasodium 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. Certificates of Analysis (COA) detailing purity, impurity profile, and physical characteristics 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 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)	≥ 95.0%
Water Content (KF)	≤ 5.0%
Solubility (in Water)	Clear solution
Heavy Metals (as Pb)	≤ 20 ppm

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