Description

3,3'-[(3-Sodiosulfo[1,1'-Biphenyl]-4,4'-Diyl)Bis(Azo)]Bis[6-[(2,4-Diaminophenyl)Azo]-4-Hydroxynaphthalene-2-Sulfonic Acid Sodium] Salt is a high-purity, complex azo dye intermediate known for its intense color properties and chemical stability. This compound is critical for synthesizing high-performance dyes and pigments with excellent fastness and vivid hues. It is primarily required by manufacturers in the textile, ink, and specialty coatings industries seeking reliable and consistent raw materials for their production processes.

Application

• Textile Dyeing: As a key intermediate for producing high-grade, wash-fast azo dyes for cotton, wool, and synthetic fibers.
• Ink Manufacturing: Used in the synthesis of pigments for industrial printing inks, including packaging and security inks.
• Leather Coloring: Employed in the production of dyes for achieving deep, uniform colors on leather goods.
• Paper Coloring: Serves as an intermediate for dyes used in specialty paper and cardboard products.
• Plastic and Polymer Pigmentation: Utilized to create colorants for plastics and synthetic materials requiring high thermal stability.
• Research & Development: Acts as a standard or reagent in chemical research for developing new chromogenic materials and analytical methods.

Basic Information

Product Name	3,3'-[(3-Sodiosulfo[1,1'-Biphenyl]-4,4'-Diyl)Bis(Azo)]Bis[6-[(2,4-Diaminophenyl)Azo]-4-Hydroxynaphthalene-2-Sulfonic Acid Sodium] Salt
CAS No.	6428-36-0
Molecular Formula	C52H34N12Na4O16S4
Molecular Weight	~1295.15 g/mol (Contact for details)
Synonyms	Direct Black 19; C.I. 35255; Azo Black; Direct Deep Black EW; 3,3'-[(3-Sulfonato[1,1'-biphenyl]-4,4'-diyl)bis(diazene-2,1-diyl)]bis[6-[(2,4-diaminophenyl)diazenyl]-4-hydroxynaphthalene-2-sulfonate] Tetrasodium Salt; Tetrasodium 3,3'-[(3-sulfonato-4,4'-biphenylylene)bis(azo)]bis[6-[(2,4-diaminophenyl)azo]-4-hydroxy-2-naphthalenesulfonate]; Benzenesulfonic acid, 3,3'-[(3-sodiosulfo[1,1'-biphenyl]-4,4'-diyl)bis(azo)]bis[6-[(2,4-diaminophenyl)azo]-4-hydroxy-, disodium salt
EINECS	229-210-2

Quality Control

Our production of 3,3'-[(3-Sodiosulfo[1,1'-Biphenyl]-4,4'-Diyl)Bis(Azo)]Bis[6-[(2,4-Diaminophenyl)Azo]-4-Hydroxynaphthalene-2-Sulfonic Acid Sodium] Salt adheres to stringent quality management protocols. Every batch undergoes comprehensive analytical testing, including HPLC for purity and spectrophotometry for color strength, to ensure it meets precise customer specifications and industry standards. Certificates of Analysis (COA) documenting identity, purity, and impurity profiles are available upon request.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at a controlled room temperature (15-25°C). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept tightly sealed to prevent absorption of atmospheric moisture, which can affect product quality and performance.

Specification

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

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