Description

Disodium 7,7'-(Carbonyldiimino)Bis[3-[[4-(Acetylamino)Phenyl]Azo]-4-Hydroxynaphthalene-2-Sulphonate] is a high-purity, synthetic organic compound belonging to the class of azo dyes and colorants. This product is valued for its excellent color strength and stability, making it a critical component in demanding industrial applications. It is primarily utilized by manufacturers in the textile, ink, and specialty coatings industries seeking consistent and vibrant coloration. The compound is supplied with a CAS number of 41204-67-5.

Application

This specialized azo compound serves as a key intermediate and colorant in several high-value industrial sectors:

• Textile Dyeing: As a primary dye for synthetic fibers like nylon and polyester, providing deep, wash-fast shades.
• Ink Formulation: Used in the production of high-performance inks for packaging, printing, and digital applications.
• Industrial Coatings: Imparts color to coatings for plastics, metals, and other substrates requiring UV and chemical resistance.
• Paper Coloring: Employed in specialty paper products where consistent and bright coloration is required.
• Biological Staining: Potential use as a histological stain in laboratory settings due to its specific chromogenic properties.
• Research & Development: Serves as a chemical intermediate or reference standard in organic synthesis and analytical chemistry.

Basic Information

Product Name	Disodium 7,7'-(Carbonyldiimino)Bis[3-[[4-(Acetylamino)Phenyl]Azo]-4-Hydroxynaphthalene-2-Sulphonate]
CAS No.	41204-67-5
Molecular Formula	C44H30N8Na2O11S2
Molecular Weight	956.86 g/mol
Synonyms	Acid Black 172; C.I. 172155; Disodium 7,7'-ureylenebis[3-[[4-(acetylamino)phenyl]azo]-4-hydroxy-2-naphthalenesulfonate]; 7,7'-(Carbonyldiimino)bis[3-[[4-(acetylamino)phenyl]azo]-4-hydroxy-2-naphthalenesulfonic acid] disodium salt; Azo Black 172; Leather Black 172; Disodium 7,7'-carbonylbis[imino(3-[(4-acetamidophenyl)azo]-4-hydroxy-2-naphthalenesulfonate)]
EINECS	Contact for details

Quality Control

Our production of Disodium 7,7'-(Carbonyldiimino)Bis[3-[[4-(Acetylamino)Phenyl]Azo]-4-Hydroxynaphthalene-2-Sulphonate] adheres to stringent quality management protocols. Every batch undergoes comprehensive analytical testing to ensure consistent purity, color value, and performance characteristics. Certificates of Analysis (COA) detailing key parameters such as assay, impurity profile, and physical specifications are available upon request to support your quality assurance and regulatory needs.

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). Keep away from incompatible materials such as strong oxidizing agents. The product is light-sensitive (store away from light) as indicated in its chemical properties.

Specification

Item	Specification
Appearance	Dark blue to black powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 5.0%
Sulfated Ash	≤ 20.0%
Heavy Metals (as Pb)	≤ 20 ppm
Water Solubility	Freely soluble

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