Description

7,7'-(Carbonyldiimino)Bis[4-Hydroxy-3-[(2-Hydroxyphenyl)Azo]-2-Naphthalenesulfonic Acid]Disodium Salt is a high-purity, water-soluble azo dye intermediate of significant industrial importance. This compound is valued for its ability to impart strong, stable coloration and its role as a key precursor in the synthesis of specialized dyes and pigments. It is primarily sought by manufacturers in the textile, leather, ink, and specialty chemical industries for producing high-performance colorants.

Application

• Primary Intermediate for Azo Dyes: Serves as a crucial building block in the synthesis of acid dyes, direct dyes, and reactive dyes used for coloring nylon, wool, silk, and paper.
• Textile and Leather Processing: Used in the formulation of dyes for achieving deep, vibrant shades on natural and synthetic fibers, as well as in leather finishing.
• Ink and Toner Manufacturing: Employed in the production of colorants for inks, including those used in packaging, printing, and digital applications.
• Biological Staining Reagent: Potential use as a specialized stain in histology and microscopy due to its chromophoric properties.
• Research & Development: Utilized in chemical research for studying azo coupling reactions and developing novel chromophores with specific light-absorption characteristics.
• Specialty Chemical Synthesis: Acts as a functional intermediate for creating complex molecules used in advanced materials and analytical chemistry.

Basic Information

Product Name	7,7'-(Carbonyldiimino)Bis[4-Hydroxy-3-[(2-Hydroxyphenyl)Azo]-2-Naphthalenesulfonic Acid]Disodium Salt
CAS No.	82944-44-3
Molecular Formula	C34H20N6Na2O11S2
Molecular Weight	806.72 g/mol
Synonyms	Acid Black 107; C.I. 15711; 7,7'-Urylenediimino)bis[4-hydroxy-3-(2-hydroxyphenyl)azo]-2-naphthalenesulfonic acid disodium salt; Disodium 7,7'-(carbonyldiimino)bis(4-hydroxy-3-[(2-hydroxyphenyl)azo]naphthalene-2-sulphonate); C.I. Acid Black 107; Azo Dye Intermediate 82944-44-3
EINECS	Contact for details

Quality Control

Our 7,7'-(Carbonyldiimino)Bis[4-Hydroxy-3-[(2-Hydroxyphenyl)Azo]-2-Naphthalenesulfonic Acid]Disodium Salt is manufactured under a strict quality management system. Each batch undergoes rigorous analytical testing to ensure consistent purity, color strength, and performance. Certificates of Analysis (COA) detailing assay, impurity profile, and physical specifications are provided to guarantee compliance with your technical requirements.

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 (moisture-sensitive) nature, the container must be kept tightly sealed after each use to prevent absorption of atmospheric moisture, which can affect product quality and handling properties.

Specification

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

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