Description

Disodium 7,7'-(Carbonyldiimino)Bis[4-Hydroxy-3-[(2-Methoxyphenyl)Azo]Naphthalene-2-Sulphonate] is a high-purity, synthetic organic dye belonging to the class of azo dyes, valued for its specific color properties and chemical stability. This compound is essential for applications requiring precise and durable coloration in specialized industrial processes. It is primarily sought by manufacturers in the textile, ink, and specialty coatings industries, where consistent quality and performance are critical.

Application

• Textile Dyeing: Used as a key colorant for dyeing synthetic and natural fibers, providing vibrant and wash-fast shades.
• Ink Formulation: Serves as a pigment or dye component in the production of specialty printing inks, including inks for packaging and security printing.
• Industrial Coatings: Incorporated into coatings and paints where specific color matching and lightfastness are required.
• Paper Coloring: Applied in the manufacture of colored papers and specialty paper products.
• Biological Staining: Potential use as a histological or cytological stain in laboratory settings, subject to specific purity grades.
• Plastics and Polymers: Used for mass coloration of plastics and synthetic polymers during manufacturing.

Basic Information

Product Name	Disodium 7,7'-(Carbonyldiimino)Bis[4-Hydroxy-3-[(2-Methoxyphenyl)Azo]Naphthalene-2-Sulphonate]
CAS No.	72749-88-3
Molecular Formula	C44H30N6Na2O12S2
Molecular Weight	952.82 g/mol
Synonyms	Acid Black 210; C.I. 300310; Disodium 7,7'-ureylenebis[4-hydroxy-3-(2-methoxyphenylazo)naphthalene-2-sulphonate]; 7,7'-(Carbonyldiimino)bis[4-hydroxy-3-[(2-methoxyphenyl)azo]-2-naphthalenesulfonic acid, disodium salt; Azo Black; Black Dye 210; C.I. Acid Black 210; Mordant Black Dye
EINECS	Contact for details

Quality Control

Our Disodium 7,7'-(Carbonyldiimino)Bis[4-Hydroxy-3-[(2-Methoxyphenyl)Azo]Naphthalene-2-Sulphonate] is manufactured under a strict quality management system. Every batch undergoes comprehensive analytical testing to ensure it meets precise specifications for color strength, purity, and chemical composition. A Certificate of Analysis (COA) detailing assay, impurity profile, and physical properties is provided with each shipment to guarantee traceability and compliance with your requirements.

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 and sources of ignition. Due to its light-sensitive nature, prolonged exposure to direct light should be avoided to maintain product integrity.

Specification

Item	Specification
Appearance	Dark blue to black powder
Identification (IR)	Conforms to standard
Assay (HPLC)	≥ 95.0%
Color Strength	100 ± 5% (vs. Standard)
Loss on Drying	≤ 5.0%
Sulfated Ash	≤ 20.0%
Heavy Metals (as Pb)	≤ 20 ppm
Solubility (in Water)	Clear solution

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