Description

Potassium Sodium 7,7'-(Carbonyldiimino)Bis[4-Hydroxy-3-[(2-Methoxyphenyl)Azo]Naphthalene-2-Sulphonate] is a high-purity, water-soluble azo dye complex valued for its strong colorant properties and chemical stability. This compound is essential for industries requiring precise and durable coloration in specialized applications. It is primarily used by manufacturers in the textile, ink, and specialty coatings sectors seeking consistent batch-to-batch performance.

Application

• Textile Dyeing: Used as a key colorant for dyeing natural and synthetic fibers, particularly where specific shade fastness is required.
• Ink Formulation: Serves as a pigment in the production of industrial inks for packaging, printing, and coding.
• Specialty Coatings: Incorporated into coatings and paints where chemical resistance and color stability are critical.
• Biological Staining: Potential use as a histological stain in laboratory settings for microscopic analysis.
• Research & Development: Employed as a standard or intermediate in chemical synthesis and analytical method development.
• Paper Coloring: Applied in the manufacture of colored papers and paper products.
• Leather Processing: Used in dyeing processes for leather goods.
• Plastics and Polymers: Acts as a colorant for certain types of plastics and polymeric materials.

Basic Information

Product Name	Potassium Sodium 7,7'-(Carbonyldiimino)Bis[4-Hydroxy-3-[(2-Methoxyphenyl)Azo]Naphthalene-2-Sulphonate]
CAS No.	83221-61-8
Molecular Formula	C48H30K2N6Na2O16S4
Molecular Weight	1192.2 g/mol (approx.)
Synonyms	Acid Black 210; C.I. 28440; 7,7'-(Carbonyldiimino)bis[4-hydroxy-3-[(2-methoxyphenyl)azo]-2-naphthalenesulfonic acid, potassium sodium salt; Potassium Sodium 7,7'-(Carbonyldiimino)bis[4-hydroxy-3-(2-methoxyphenylazo)naphthalene-2-sulfonate]; C.I. Acid Black 210; Mordant Black 31 (related class); Azo Dye Complex 83221-61-8
EINECS	Contact for details

Quality Control

Our Potassium Sodium 7,7'-(Carbonyldiimino)Bis[4-Hydroxy-3-[(2-Methoxyphenyl)Azo]Naphthalene-2-Sulphonate] is manufactured under a strict quality management system. Every batch undergoes rigorous analytical testing to ensure it meets precise specifications for purity, color strength, and solubility. Certificates of Analysis (COA) documenting key parameters are available upon request to support your quality assurance protocols.

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). Keep away from incompatible materials and sources of ignition. This material is light-sensitive (store away from light).

Specification

Item	Specification
Appearance	Dark brown to black powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 5.0%
Sulfated Ash	≤ 20.0%
Solubility (in Water)	Freely soluble
Heavy Metals (as Pb)	≤ 20 ppm
pH (1% Solution)	6.0 - 8.0

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